#81: added utils.function. utils cleanup. removed unused files

sxpat/utils/collections.py

@@ -1,8 +1,9 @@
 from __future__ import annotations
 from collections import UserDict
-from typing import Iterable, Iterator, Mapping, Sequence, Tuple, Type, TypeVar, Union
+from typing import Iterable, Iterator, Mapping, Tuple, Type, TypeVar
 
-import itertools
+
+__all__ = ['mapping_inv', 'flat', 'pairwise', 'MultiDict', 'InheritanceMapping']
 
 
 NOTHING = object()
@@ -39,6 +40,10 @@ def pairwise(iterable: Iterable[T]) -> Iterator[Tuple[T, T]]:
         a = b
 
 
+def unzip(iterable: Iterable) -> Iterable:
+    return zip(*iterable)
+
+
 class MultiDict(UserDict, Mapping[K, V]):
     def __init__(self, mapping: Mapping[Iterable[K], V] = None) -> None:
         super().__init__()

sxpat/utils/functions.py

@@ -0,0 +1,27 @@
+from typing import Callable, TypeVar
+
+
+__all__ = ['get_producer', 'identity', 'str_to_bool']
+
+
+T = TypeVar('T')
+
+
+def get_producer(value: T) -> Callable[[], T]:
+    return lambda: value
+
+
+def identity(value: T) -> T:
+    return value
+
+
+STR_TO_BOOL = {
+    'true': True,
+    't': True,
+    'false': False,
+    'f': False,
+}
+
+
+def str_to_bool(string: str) -> bool:
+    return STR_TO_BOOL[string.lower()]

sxpat/utils/inheritance.py

@@ -1,4 +1,7 @@
-from typing import List, Set, Type
+from typing import Set, Type
+
+
+__all__ = ['get_all_subclasses', 'get_all_leaves_subclasses']
 
 
 def get_all_subclasses(cls: Type) -> Set[Type]: