feat: added max size in cache

openvariant/annotation/process.py

@@ -41,6 +41,21 @@ def _static_process(x: StaticBuilder, original_header: List = [] or None, file_p
 
 def _internal_process(x: InternalBuilder, original_header = List or None, file_path: str = None, annotation: dict = None) \
         -> InternalProcess:
+    """Get a Internal value
+    It will return a InternalProcess describing the value to get from static annotation.
+    Parameters
+    ----------
+    x : StaticBuilder
+        Annotation builder.
+    Returns
+    -------
+    str
+        Annotation type
+    float or int or str
+        Fixed value
+    Callable
+        Function to execute on the fixed value
+    """
     field_pos = None
     try:
         for i, h in enumerate(original_header):

openvariant/variant/variant.py

@@ -89,7 +89,7 @@ def _extract_header(file_path: str, original_header: list, annotation: Annotatio
     return header_schema, annotation.columns
 
 
-@lru_cache
+@lru_cache(maxsize=256)
 def _parse_field(value: float or int or str, func: Callable) -> str:
     """Getting the value of a specific annotation field. Cached with LRU policy"""
     return func(value)