Improved documentation and code readability

Author: LucaCappelletti94

README.rst

@@ -1,4 +1,4 @@
-Transpose Dictionary
+🎲 Transpose Dictionary
 ======================
 |pip| |downloads| |github|
 

setup.py

@@ -42,7 +42,7 @@ def find_version(*file_paths):
     # https://packaging.python.org/en/latest/single_source_version.html
     version=__version__,
 
-    description='Small customizable multiprocessing multi-proxy crawler.',
+    description='Package to transpose dictionaries across any axes, just like n-dimensional matrices.',
     long_description=long_description,
 
     # The project's main homepage.

transpose_dict/transpose_dict.py

@@ -52,9 +52,9 @@ def axis_keys(dictionary: Dict, axis: int) -> Set[Any]:
     The set of keys at given axis
     """
     return (
-        set.union(*[axis_keys(value, axis - 1) for value in dictionary.values()])
-        if axis
-        else set(dictionary.keys())
+        set.union(*[set(axis_keys(value, axis - 1)) for value in dictionary.values()])
+        if axis != 0
+        else dictionary.keys()
     )