Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

"can't set attribute" error

See original GitHub issue

I’ve install iepy on an arch linux machine in a fresh conda environment. There are no problems during installation with pip install iepy

However, if I try to run iepy there is an error message

Traceback (most recent call last):
  File "/home/donnut/anaconda/envs/iepy/bin/iepy", line 7, in <module>
    from iepy.instantiation.command_line import execute_from_command_line
  File "/home/donnut/anaconda/envs/iepy/lib/python3.5/site-packages/iepy/instantiation/command_line.py", line 20, in <module>
    import nltk.data
  File "/home/donnut/anaconda/envs/iepy/lib/python3.5/site-packages/nltk/__init__.py", line 117, in <module>
    from nltk.align import *
  File "/home/donnut/anaconda/envs/iepy/lib/python3.5/site-packages/nltk/align/__init__.py", line 15, in <module>
    from nltk.align.ibm1 import IBMModel1
  File "/home/donnut/anaconda/envs/iepy/lib/python3.5/site-packages/nltk/align/ibm1.py", line 18, in <module>
    from nltk.corpus import comtrans
  File "/home/donnut/anaconda/envs/iepy/lib/python3.5/site-packages/nltk/corpus/__init__.py", line 64, in <module>
    from nltk.tokenize import RegexpTokenizer
  File "/home/donnut/anaconda/envs/iepy/lib/python3.5/site-packages/nltk/tokenize/__init__.py", line 65, in <module>
    from nltk.tokenize.regexp   import (RegexpTokenizer, WhitespaceTokenizer,
  File "/home/donnut/anaconda/envs/iepy/lib/python3.5/site-packages/nltk/tokenize/regexp.py", line 201, in <module>
    blankline_tokenize = BlanklineTokenizer().tokenize
  File "/home/donnut/anaconda/envs/iepy/lib/python3.5/site-packages/nltk/tokenize/regexp.py", line 172, in __init__
    RegexpTokenizer.__init__(self, r'\s*\n\s*\n\s*', gaps=True)
  File "/home/donnut/anaconda/envs/iepy/lib/python3.5/site-packages/nltk/tokenize/regexp.py", line 119, in __init__
    self._regexp = compile_regexp_to_noncapturing(pattern, flags)
  File "/home/donnut/anaconda/envs/iepy/lib/python3.5/site-packages/nltk/internals.py", line 54, in compile_regexp_to_noncapturing
    return sre_compile.compile(convert_regexp_to_noncapturing_parsed(sre_parse.parse(pattern)), flags=flags)
  File "/home/donnut/anaconda/envs/iepy/lib/python3.5/site-packages/nltk/internals.py", line 50, in convert_regexp_to_noncapturing_parsed
    parsed_pattern.pattern.groups = 1
AttributeError: can't set attribute

Any idea what might be wrong?