What is producing “TypeError character mapping must return integer…” in this python code?

Question

please, can someone help me with the code bellow? When I run it the logs said:

return method(*args, **kwargs)
  File \"C:\\Users\\CG\\Documents\\udacity\\ro         


        

Answer 1

It's probably because the text is being entered as unicode:

>>> def rot13(st):
...     import string
...     tab1 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
...     tab2 = 'nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM'
...     tab = string.maketrans(tab1, tab2)
...     return st.translate(tab)
... 
>>> rot13('test')
'grfg'
>>> rot13(u'test')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 6, in rot13
TypeError: character mapping must return integer, None or unicode
>>> 

This question covers what you need:

• How do I get str.translate to work with Unicode strings?

If you are sure that unicode strings aren't important I guess you could just:

return str(st).translate(tab)