doc: Fix Flake8 issues in example files

.flake8

@@ -22,9 +22,7 @@ per-file-ignores =
     __init__.py: F401, F403
     man/build_html.py: E501
     imagery/i.atcorr/create_iwave.py: F632, F821, W293
-    doc/python/raster_example_ctypes.py: F403, F405
-    doc/python/vector_example_ctypes.py: F403, F405
-    doc/python/m.distance.py: F403, F405, E501
+    doc/python/m.distance.py: E501
     doc/gui/wxpython/example/dialogs.py: F401
     locale/grass_po_stats.py: E122, E128, E231, E401, E722
     gui/scripts/d.wms.py: E501

doc/python/m.distance.py

@@ -45,10 +45,21 @@
 # %end
 
 import sys
+from ctypes import byref, c_double
 
 import grass.script as gs
-
-from grass.lib.gis import *
+from grass.lib.gis import (
+    G_gisinit,
+    G_begin_distance_calculations,
+    G_scan_easting,
+    G_scan_northing,
+    G_distance,
+    G_begin_polygon_area_calculations,
+    G_area_of_polygon,
+    G_database_units_to_meters_factor,
+    G_database_unit_name,
+    PROJECTION_LL,
+)
 
 
 def main():

doc/python/raster_example_ctypes.py

@@ -17,9 +17,23 @@
 
 import os
 import sys
-
-from grass.lib.gis import *
-from grass.lib.raster import *
+import math
+
+from ctypes import POINTER, c_int, c_float, c_double, c_void_p, cast
+
+from grass.lib.gis import G_gisinit, G_find_raster2, G_free
+from grass.lib.raster import (
+    Rast_map_type,
+    CELL_TYPE,
+    FCELL_TYPE,
+    DCELL_TYPE,
+    Rast_open_old,
+    Rast_allocate_buf,
+    Rast_window_rows,
+    Rast_window_cols,
+    Rast_get_row,
+    Rast_close,
+)
 
 # check if GRASS is running or not
 if "GISBASE" not in os.environ:

doc/python/vector_example_ctypes.py

@@ -7,9 +7,28 @@
 
 import os
 import sys
+from ctypes import pointer, byref
 
-from grass.lib.gis import *
-from grass.lib.vector import *
+# Import specific functions and classes instead of using wildcard imports
+from grass.lib.gis import G_gisinit, G_find_vector2
+from grass.lib.vector import (
+    Map_info,
+    Vect_set_open_level,
+    Vect_open_old,
+    Vect_get_full_name,
+    Vect_is_3d,
+    Vect_get_num_dblinks,
+    Vect_get_scale,
+    Vect_get_map_box,
+    Vect_point_in_box,
+    Vect_get_num_lines,
+    Vect_get_num_primitives,
+    Vect_get_num_areas,
+    Vect_close,
+    bound_box,
+    GV_POINT,
+    GV_LINE,
+)
 
 if "GISBASE" not in os.environ:
     sys.exit("You must be in GRASS GIS to run this program.")