Docstrings for common package

common/tools.py

@@ -2,4 +2,13 @@ import re
 
 
 def check_sha256_hex_format(value):
+    """
+    Checks if a given value is a 32-byte hex encoded string.
+
+    Args:
+        value(:mod:`str`): the value to be checked.
+
+    Returns:
+        :mod:`bool`: Wether or not the value matches the format.
+    """
     return isinstance(value, str) and re.search(r"^[0-9A-Fa-f]{64}$", value) is not None