elif not str(obj):
         return repr(obj)
     else:
         return str(obj)
 
-def depth_indent(c = ".") -> str:
+
+def depth_indent(c=".") -> str:
     """
     This function returns a string of :code:`c` characters/strings, where the
     number of characters is equal to the depth of the current function call
     stack (where only the calling function is considered). This is useful for
     debugging recursive functions.