NameError global name unicode is not defined - in Python 3

Question

I am trying to use a Python package called bidi  In a module in this package  algorithm py  there are some lines that give me error  although it is part of the package   Here are the lines     utf-8   we need unicode if isinstance unicode or str  unicode       text   unicode or str     decoded   False else      text   unicode or str decode encoding      decoded   True   and here is the error message   Traceback  most recent call last     File   lt pyshell 25 gt    line 1  in  lt module gt      bidi text   get display reshaped text    File  C  Python33 lib site-packages python bidi-0 3 4-py3 3 egg bidi algorithm py     line 602  in get display     if isinstance unicode or str  unicode   NameError  global name  unicode  is not defined   How should I re-write this part of the code so it works in Python3  Also if anyone have used bidi package with Python 3 please let me know if they have found similar problems or not  I appreciate your help

User · Answer

One can replace unicode with u     class   to handle the missing unicode class in Python 3  For both Python 2 and 3  you can use the construct isinstance unicode or str  u     class     or type unicode or str     type u     Depending on your further processing  consider the different outcome  Python 3  gt  gt  gt  isinstance  text   u     class    True  gt  gt  gt  isinstance u text   u     class    True  Python 2  gt  gt  gt  isinstance u text   u     class    True  gt  gt  gt  isinstance  text   u     class    False

User · Answer

Python 3 renamed the unicode type to str  the old str type has been replaced by bytes   if isinstance unicode or str  str       text   unicode or str     decoded   False else      text   unicode or str decode encoding      decoded   True   You may want to read the Python 3 porting HOWTO for more such details  There is also Lennart Regebro s Porting to Python 3  An in-depth guide  free online   Last but not least  you could just try to use the 2to3 tool to see how that translates the code for you

User · Answer

If you need to have the script keep working on python2 and 3 as I did  this might help someone  import sys if sys version info 0   gt   3      unicode   str   and can then just do for example  foo   unicode lower foo

User · Answer

Hope you are using Python 3   Str are unicode by default  so please  Replace Unicode function with String Str function   if isinstance unicode or str  str        Replaces with str     text   unicode or str     decoded   False

User · Answer

You can use the six library to support both Python 2 and 3   import six if isinstance value  six string types       handle string value

[python] NameError: global name 'unicode' is not defined - in Python 3

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