diff --git a/pm4py/algo/discovery/powl/__init__.py b/pm4py/algo/discovery/powl/__init__.py
index 96a4e7ab9..b16af9245 100644
--- a/pm4py/algo/discovery/powl/__init__.py
+++ b/pm4py/algo/discovery/powl/__init__.py
@@ -1,2 +1,19 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.algo.discovery.powl import *
 
diff --git a/pm4py/algo/discovery/powl/algorithm.py b/pm4py/algo/discovery/powl/algorithm.py
index 7789c368e..91911110d 100644
--- a/pm4py/algo/discovery/powl/algorithm.py
+++ b/pm4py/algo/discovery/powl/algorithm.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.algo.discovery.inductive.dtypes.im_ds import IMDataStructureUVCL
 from pm4py.algo.discovery.powl.inductive.variants.im_base import IMBasePOWL
 from pm4py.algo.discovery.powl.inductive.variants.im_brute_force import BruteForcePOWL
diff --git a/pm4py/algo/discovery/powl/inductive/__init__.py b/pm4py/algo/discovery/powl/inductive/__init__.py
index 113c6d6ad..6744fd1bc 100644
--- a/pm4py/algo/discovery/powl/inductive/__init__.py
+++ b/pm4py/algo/discovery/powl/inductive/__init__.py
@@ -1 +1,18 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.algo.discovery.powl.inductive import *
diff --git a/pm4py/algo/discovery/powl/inductive/base_case/__init__.py b/pm4py/algo/discovery/powl/inductive/base_case/__init__.py
index 46e4e7795..393bf9a7a 100644
--- a/pm4py/algo/discovery/powl/inductive/base_case/__init__.py
+++ b/pm4py/algo/discovery/powl/inductive/base_case/__init__.py
@@ -1 +1,18 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.algo.discovery.powl.inductive.base_case import *
diff --git a/pm4py/algo/discovery/powl/inductive/base_case/abc.py b/pm4py/algo/discovery/powl/inductive/base_case/abc.py
index e89d46f58..11f14d34b 100644
--- a/pm4py/algo/discovery/powl/inductive/base_case/abc.py
+++ b/pm4py/algo/discovery/powl/inductive/base_case/abc.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from abc import ABC, abstractmethod
 from typing import Union, TypeVar, Generic, Optional, Dict, Any
 
diff --git a/pm4py/algo/discovery/powl/inductive/base_case/empty_log.py b/pm4py/algo/discovery/powl/inductive/base_case/empty_log.py
index 148a3d3a2..d8bb7a84a 100644
--- a/pm4py/algo/discovery/powl/inductive/base_case/empty_log.py
+++ b/pm4py/algo/discovery/powl/inductive/base_case/empty_log.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from abc import ABC
 from typing import Generic, Optional, Dict, Any
 
diff --git a/pm4py/algo/discovery/powl/inductive/base_case/factory.py b/pm4py/algo/discovery/powl/inductive/base_case/factory.py
index 5e99c5375..32dbe4459 100644
--- a/pm4py/algo/discovery/powl/inductive/base_case/factory.py
+++ b/pm4py/algo/discovery/powl/inductive/base_case/factory.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from typing import TypeVar, Optional, Dict, Any, Type
 
 from pm4py.algo.discovery.powl.inductive.base_case.abc import BaseCase
diff --git a/pm4py/algo/discovery/powl/inductive/base_case/single_activity.py b/pm4py/algo/discovery/powl/inductive/base_case/single_activity.py
index 6489b482f..23ed0a315 100644
--- a/pm4py/algo/discovery/powl/inductive/base_case/single_activity.py
+++ b/pm4py/algo/discovery/powl/inductive/base_case/single_activity.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.algo.discovery.powl.inductive.base_case.abc import BaseCase
 from pm4py.algo.discovery.inductive.dtypes.im_ds import IMDataStructureUVCL
 from typing import Optional, Dict, Any
diff --git a/pm4py/algo/discovery/powl/inductive/cuts/__init__.py b/pm4py/algo/discovery/powl/inductive/cuts/__init__.py
index 188a24e78..4903c80e8 100644
--- a/pm4py/algo/discovery/powl/inductive/cuts/__init__.py
+++ b/pm4py/algo/discovery/powl/inductive/cuts/__init__.py
@@ -1 +1,18 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.algo.discovery.powl.inductive.cuts import *
diff --git a/pm4py/algo/discovery/powl/inductive/cuts/concurrency.py b/pm4py/algo/discovery/powl/inductive/cuts/concurrency.py
index fc3d8e0c8..f5bda39fa 100644
--- a/pm4py/algo/discovery/powl/inductive/cuts/concurrency.py
+++ b/pm4py/algo/discovery/powl/inductive/cuts/concurrency.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from abc import ABC
 from typing import Any, Optional, Dict, Generic
 
diff --git a/pm4py/algo/discovery/powl/inductive/cuts/factory.py b/pm4py/algo/discovery/powl/inductive/cuts/factory.py
index 08e2b57b8..845b67652 100644
--- a/pm4py/algo/discovery/powl/inductive/cuts/factory.py
+++ b/pm4py/algo/discovery/powl/inductive/cuts/factory.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from typing import List, Optional, Tuple, Dict, Any, Type
 
 from pm4py.algo.discovery.inductive.cuts.factory import S, T
diff --git a/pm4py/algo/discovery/powl/inductive/cuts/loop.py b/pm4py/algo/discovery/powl/inductive/cuts/loop.py
index 89ad79eef..b73b80e04 100644
--- a/pm4py/algo/discovery/powl/inductive/cuts/loop.py
+++ b/pm4py/algo/discovery/powl/inductive/cuts/loop.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from abc import ABC
 from typing import Optional, Any, Dict, Generic
 
diff --git a/pm4py/algo/discovery/powl/inductive/cuts/sequence.py b/pm4py/algo/discovery/powl/inductive/cuts/sequence.py
index 83bf854c1..e3913084e 100644
--- a/pm4py/algo/discovery/powl/inductive/cuts/sequence.py
+++ b/pm4py/algo/discovery/powl/inductive/cuts/sequence.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from abc import ABC
 from typing import Any, Optional, Dict, Tuple, List, Generic
 
diff --git a/pm4py/algo/discovery/powl/inductive/cuts/xor.py b/pm4py/algo/discovery/powl/inductive/cuts/xor.py
index 4b721eafa..d289d48c2 100644
--- a/pm4py/algo/discovery/powl/inductive/cuts/xor.py
+++ b/pm4py/algo/discovery/powl/inductive/cuts/xor.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from abc import ABC
 from typing import Optional, Any, Dict, Generic
 
diff --git a/pm4py/algo/discovery/powl/inductive/fall_through/__init__.py b/pm4py/algo/discovery/powl/inductive/fall_through/__init__.py
index 4c3d9babf..32963ed9b 100644
--- a/pm4py/algo/discovery/powl/inductive/fall_through/__init__.py
+++ b/pm4py/algo/discovery/powl/inductive/fall_through/__init__.py
@@ -1 +1,18 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.algo.discovery.powl.inductive.fall_through import *
\ No newline at end of file
diff --git a/pm4py/algo/discovery/powl/inductive/fall_through/activity_concurrent.py b/pm4py/algo/discovery/powl/inductive/fall_through/activity_concurrent.py
index 4210b59e7..7d3733f6f 100644
--- a/pm4py/algo/discovery/powl/inductive/fall_through/activity_concurrent.py
+++ b/pm4py/algo/discovery/powl/inductive/fall_through/activity_concurrent.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from collections import Counter
 from multiprocessing import Pool, Manager
 from typing import Optional, Tuple, List, Any, Dict
diff --git a/pm4py/algo/discovery/powl/inductive/fall_through/activity_once_per_trace.py b/pm4py/algo/discovery/powl/inductive/fall_through/activity_once_per_trace.py
index 190fbc567..6416f0c19 100644
--- a/pm4py/algo/discovery/powl/inductive/fall_through/activity_once_per_trace.py
+++ b/pm4py/algo/discovery/powl/inductive/fall_through/activity_once_per_trace.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.algo.discovery.inductive.fall_through.activity_once_per_trace import ActivityOncePerTraceUVCL
 from pm4py.algo.discovery.powl.inductive.fall_through.activity_concurrent import POWLActivityConcurrentUVCL
 
diff --git a/pm4py/algo/discovery/powl/inductive/fall_through/empty_traces.py b/pm4py/algo/discovery/powl/inductive/fall_through/empty_traces.py
index 01fdfb832..e64fabfbe 100644
--- a/pm4py/algo/discovery/powl/inductive/fall_through/empty_traces.py
+++ b/pm4py/algo/discovery/powl/inductive/fall_through/empty_traces.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from collections import Counter
 from multiprocessing import Pool, Manager
 from typing import Tuple, List, Optional, Dict, Any
diff --git a/pm4py/algo/discovery/powl/inductive/fall_through/factory.py b/pm4py/algo/discovery/powl/inductive/fall_through/factory.py
index 85fbf502d..78a237cb4 100644
--- a/pm4py/algo/discovery/powl/inductive/fall_through/factory.py
+++ b/pm4py/algo/discovery/powl/inductive/fall_through/factory.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from multiprocessing import Pool, Manager
 from typing import List, TypeVar, Tuple, Optional, Dict, Any, Type
 
diff --git a/pm4py/algo/discovery/powl/inductive/fall_through/flower.py b/pm4py/algo/discovery/powl/inductive/fall_through/flower.py
index c432f623a..76161fe75 100644
--- a/pm4py/algo/discovery/powl/inductive/fall_through/flower.py
+++ b/pm4py/algo/discovery/powl/inductive/fall_through/flower.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from multiprocessing import Pool, Manager
 from typing import Optional, Tuple, List, Dict, Any
 
diff --git a/pm4py/algo/discovery/powl/inductive/fall_through/strict_tau_loop.py b/pm4py/algo/discovery/powl/inductive/fall_through/strict_tau_loop.py
index 4c032a6fc..a44364a94 100644
--- a/pm4py/algo/discovery/powl/inductive/fall_through/strict_tau_loop.py
+++ b/pm4py/algo/discovery/powl/inductive/fall_through/strict_tau_loop.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from collections import Counter
 from multiprocessing import Pool, Manager
 from typing import Optional, Tuple, List, Dict, Any
diff --git a/pm4py/algo/discovery/powl/inductive/fall_through/tau_loop.py b/pm4py/algo/discovery/powl/inductive/fall_through/tau_loop.py
index 26ec01509..e4318b9b4 100644
--- a/pm4py/algo/discovery/powl/inductive/fall_through/tau_loop.py
+++ b/pm4py/algo/discovery/powl/inductive/fall_through/tau_loop.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from collections import Counter
 from typing import Optional, Dict, Any
 
diff --git a/pm4py/objects/conversion/powl/__init__.py b/pm4py/objects/conversion/powl/__init__.py
index 401689a07..8cea81f11 100644
--- a/pm4py/objects/conversion/powl/__init__.py
+++ b/pm4py/objects/conversion/powl/__init__.py
@@ -1 +1,18 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.objects.conversion.powl import *
diff --git a/pm4py/objects/conversion/powl/converter.py b/pm4py/objects/conversion/powl/converter.py
index 4f2a40ce0..f67b19056 100644
--- a/pm4py/objects/conversion/powl/converter.py
+++ b/pm4py/objects/conversion/powl/converter.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.objects.conversion.powl.variants import to_petri_net
 from pm4py.util import exec_utils
 from enum import Enum
diff --git a/pm4py/objects/conversion/powl/variants/__init__.py b/pm4py/objects/conversion/powl/variants/__init__.py
index 866bc7823..c18f14794 100644
--- a/pm4py/objects/conversion/powl/variants/__init__.py
+++ b/pm4py/objects/conversion/powl/variants/__init__.py
@@ -1 +1,18 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.objects.conversion.powl.variants import *
diff --git a/pm4py/objects/conversion/powl/variants/to_petri_net.py b/pm4py/objects/conversion/powl/variants/to_petri_net.py
index 90cbcdf16..35e3da360 100644
--- a/pm4py/objects/conversion/powl/variants/to_petri_net.py
+++ b/pm4py/objects/conversion/powl/variants/to_petri_net.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 import time
 from itertools import product
 
diff --git a/pm4py/objects/petri_net/__init__.py b/pm4py/objects/petri_net/__init__.py
index 1f618c356..a0b02e9f7 100644
--- a/pm4py/objects/petri_net/__init__.py
+++ b/pm4py/objects/petri_net/__init__.py
@@ -1 +1,18 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.objects.petri_net import obj, properties, semantics, utils, exporter, saw_net, stochastic
diff --git a/pm4py/objects/powl/BinaryRelation.py b/pm4py/objects/powl/BinaryRelation.py
index 6a9318f4e..f9672bba3 100644
--- a/pm4py/objects/powl/BinaryRelation.py
+++ b/pm4py/objects/powl/BinaryRelation.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 import copy
 from itertools import product
 from typing import Hashable, TypeVar
diff --git a/pm4py/objects/powl/__init__.py b/pm4py/objects/powl/__init__.py
index eb94901c4..802e139ea 100644
--- a/pm4py/objects/powl/__init__.py
+++ b/pm4py/objects/powl/__init__.py
@@ -1,2 +1,19 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.objects.powl import *
 
diff --git a/pm4py/objects/powl/constants.py b/pm4py/objects/powl/constants.py
index 471ab5a18..afbc49233 100644
--- a/pm4py/objects/powl/constants.py
+++ b/pm4py/objects/powl/constants.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 SILENT_TRANSITION_LABEL = "tau"
 STRICT_PARTIAL_ORDER_LABEL = "PO"
 SEQUENCE_LABEL = "->"
diff --git a/pm4py/objects/powl/obj.py b/pm4py/objects/powl/obj.py
index 315bb239c..efdc314fb 100644
--- a/pm4py/objects/powl/obj.py
+++ b/pm4py/objects/powl/obj.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.objects.powl.BinaryRelation import BinaryRelation
 from pm4py.objects.powl.constants import STRICT_PARTIAL_ORDER_LABEL
 from pm4py.objects.process_tree.obj import ProcessTree, Operator
diff --git a/pm4py/statistics/eventually_follows/__init__.py b/pm4py/statistics/eventually_follows/__init__.py
index 20d3b4b12..059b4846a 100644
--- a/pm4py/statistics/eventually_follows/__init__.py
+++ b/pm4py/statistics/eventually_follows/__init__.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.statistics.eventually_follows import log, uvcl
 import pkgutil
 
diff --git a/pm4py/statistics/eventually_follows/uvcl/__init__.py b/pm4py/statistics/eventually_follows/uvcl/__init__.py
index 393c5d9da..1544806f6 100644
--- a/pm4py/statistics/eventually_follows/uvcl/__init__.py
+++ b/pm4py/statistics/eventually_follows/uvcl/__init__.py
@@ -1 +1,18 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.statistics.eventually_follows.uvcl import get
\ No newline at end of file
diff --git a/pm4py/statistics/eventually_follows/uvcl/get.py b/pm4py/statistics/eventually_follows/uvcl/get.py
index 27fe7ae14..46b0045fa 100644
--- a/pm4py/statistics/eventually_follows/uvcl/get.py
+++ b/pm4py/statistics/eventually_follows/uvcl/get.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from enum import Enum
 
 from pm4py.algo.discovery.inductive.dtypes.im_ds import IMDataStructureUVCL
diff --git a/pm4py/visualization/powl/__init__.py b/pm4py/visualization/powl/__init__.py
index 132c7ce6a..d263a97e2 100644
--- a/pm4py/visualization/powl/__init__.py
+++ b/pm4py/visualization/powl/__init__.py
@@ -1 +1,18 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.visualization.powl import visualizer, variants
diff --git a/pm4py/visualization/powl/variants/__init__.py b/pm4py/visualization/powl/variants/__init__.py
index dc1845bd5..776b71bb0 100644
--- a/pm4py/visualization/powl/variants/__init__.py
+++ b/pm4py/visualization/powl/variants/__init__.py
@@ -1 +1,18 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.visualization.powl.variants import *
diff --git a/pm4py/visualization/powl/variants/basic.py b/pm4py/visualization/powl/variants/basic.py
index 6809dcf7d..46aeb3ec1 100644
--- a/pm4py/visualization/powl/variants/basic.py
+++ b/pm4py/visualization/powl/variants/basic.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 import tempfile
 from enum import Enum
 from graphviz import Digraph
diff --git a/pm4py/visualization/powl/visualizer.py b/pm4py/visualization/powl/visualizer.py
index cadba4d78..5eea25df0 100644
--- a/pm4py/visualization/powl/visualizer.py
+++ b/pm4py/visualization/powl/visualizer.py
@@ -1,3 +1,20 @@
+'''
+    This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
+
+    PM4Py is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    PM4Py is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with PM4Py.  If not, see <https://www.gnu.org/licenses/>.
+'''
+
 from pm4py.visualization.common import gview
 from pm4py.visualization.common import save as gsave
 from pm4py.visualization.powl.variants import basic