python 3.x - 'IndentationError: unindent does not match any outer indentation level', when indent is completly correct -

i don't know if bug, or editor error, @ specific line, throw 'indentationerror: unindent ...'
code is:

def toktype(token):     if type(token) str:         if ":" in token:             out = ""             c in token:                 if c == ":":                     break                 out += c             return out         else:             return none     elif type(token) list:         i, t in enumerate(token):             if != 0 , toktype(t) != toktype(token[i-1]):                 return "multi"         return toktype(token[0])     else:         raise typeerror("unsupported type {0}, expecting list or string!".format(type(token))) 

why getting error??

it editor fault. started write tabs instead of spaces. found-replaced tabs spaces , checked settings.