Import error in Flask (urllib in local path)

Question

Am facing the below error while trying to import Flask. Similar questions posted had issues with Werkzeug versions

from urllib.request import parse_http_list as _parse_list_header
ImportError: No module named request

File "init__.py", line 25, in <module>
    from flask import Flask
File "user/anaconda/lib/python2.7/site-packages/flask/__init__.py", line 17,   
in <module>
    from werkzeug.exceptions import abort
File "user/anaconda/lib/python2.7/site-packages/werkzeug/__init__.py", line    
154, in <module>
    __import__('werkzeug.exceptions')
File "user/anaconda/lib/python2.7/site-packages/werkzeug/exceptions.py", line  
71, in <module>
    from werkzeug.wrappers import Response
File "user/anaconda/lib/python2.7/site-packages/werkzeug/wrappers.py", line  
26, in <module>
    from werkzeug.http import HTTP_STATUS_CODES, \
File "user/anaconda/lib/python2.7/site-packages/werkzeug/http.py", line 28, in   
<module>
    from urllib.request import parse_http_list as _parse_list_header
ImportError: No module named request'

Werkzeug version(I tried with 10.1,10.4 ) still the error remains.
Someone pointed out that there might be a local copy of urllib2.. I figured out that there was both urllib and urllib2 indeed in my local path.. /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7

Now I am not sure how to proceed, Should I uninstall urllib/urllib2 ?

EDIT: The solution listed in Tried to use relative imports, and broke my import paths? doesn't work for me. In this case, I tried importing urllib2 into my Flask project and printing out the file path, but that throws the below exceptions

File "/user/__init__.py", line 25, in <module>
  import urllib2
File "/user/anaconda/lib/python2.7/urllib2.py", line 94, in <module>
  import httplib
File "/user/anaconda/lib/python2.7/httplib.py", line 80, in <module>
  import mimetools
File "/user/anaconda/lib/python2.7/mimetools.py", line 6, in <module>
  import tempfile
File "/user/anaconda/lib/python2.7/tempfile.py", line 32, in <module>
  import io as _io
File "/user/anaconda/lib/python2.7/io.py", line 51, in <module>
  import _io

ImportError: dlopen(/user/anaconda/lib/python2.7/lib-dynload/_io.so, 2): Symbol not found: __PyErr_ReplaceException Referenced from: /user/anaconda/lib/python2.7/lib-dynload/_io.so Expected in: dynamic lookup

http://stackoverflow.com/questions/17391289/tried-to-use-relative-imports-and-broke-my-import-paths might be a duplicate question — TehTris, Jul 10 '15 at 21:18
The answer to that question did not address my issue. So I tried importing urllib2 from my flask project and printing the file path. Ideally it should give me the file path.. but I get the import error again — bpt, Jul 10 '15 at 21:21
so what happened when you did `from urllib2 import parse_http_list as _parse_list_header` ? — TehTris, Jul 10 '15 at 21:23
Maybe these two links may give you more ideas: http://stackoverflow.com/questions/19698509/flask-import-error-with-request-module http://stackoverflow.com/questions/3745771/urllib-request-in-python-2-7 — juanmajmjr, Jul 10 '15 at 21:56

score 1 · Answer 1 · edited May 23 '17 at 12:30

I had a similar issue, and I followed the recommendation in the solution by adding from urllib2 import parse_http_list as _parse_list_header before from flask import Flask, then I got this error message:

"/Users/anaconda/lib/python2.7/io.py", line 51, in import _io 
ImportError: dlopen(/Users/anaconda/lib/python2.7/lib-dynload/_io.so, 2): 
Symbol not found: __PyCodecInfo_GetIncrementalDecoder 
Referenced from: /Users/anaconda/lib/python2.7/lib-dynload/_io.so 
Expected in: dynamic lookup

which I then resolved by following the solution:

sudo find / -name _io.so
I replaced /Users/anaconda/lib/python2.7/lib-dynload/_io.so with /usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_io.so

It works for me!

score 0 · Answer 2 · answered Apr 09 '20 at 16:02

In my case, one of my python-modules named uu. Such as a file in python3-email module.

  ... line 4, in <module>
    import flask
  File "/usr/lib/python3/dist-packages/werkzeug/http.py", line 28, in <module>
    from urllib.request import parse_http_list as _parse_list_header
  File "/usr/lib/python3.4/urllib/request.py", line 88, in <module>
    import http.client
  File "/usr/lib/python3.4/http/client.py", line 69, in <module>
    import email.parser
  File "/usr/lib/python3.4/email/parser.py", line 12, in <module>
    from email.feedparser import FeedParser, BytesFeedParser
  File "/usr/lib/python3.4/email/feedparser.py", line 27, in <module>
    from email import message
  File "/usr/lib/python3.4/email/message.py", line 10, in <module>
    import uu

Then, i have the same error:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/werkzeug/http.py", line 26, in <module>
    from urllib2 import parse_http_list as _parse_list_header
ImportError: No module named 'urllib2'

I hope, this example will help you.

Import error in Flask (urllib in local path)

2 Answers2