TypeError: __str__ returned non-string (type Error)

[mohsen8156]

• Pip version: 1.5.6
• Python version: 2.7
• Operating system: Rasbian

when I run this command see this bug:

sudo pip install -U Cython==0.28.2

Downloading/unpacking Cython==0.28.2
Cleaning up...
Exception:
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 122, in main
status = self.run(options, args)
File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 290, in run
requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
File "/usr/lib/python2.7/dist-packages/pip/req.py", line 1178, in prepare_files
url = finder.find_requirement(req_to_install, upgrade=self.upgrade)
File "/usr/lib/python2.7/dist-packages/pip/index.py", line 194, in find_requirement
page = self._get_page(main_index_url, req)
File "/usr/lib/python2.7/dist-packages/pip/index.py", line 568, in _get_page
session=self.session,
File "/usr/lib/python2.7/dist-packages/pip/index.py", line 694, in get_page
req, link, "connection error: %s" % exc, url,
TypeError: str returned non-string (type Error)

Storing debug log for failure in /root/.pip/pip.log

thanks in advance.

[pradyunsg]

Hey @mohsen8156!

You are using a very old version of pip. Could you try getting the current stable version of pip (possibly using get-pip.py) and check if the issue still occurs?

[mohsen8156]

i use get-pip.py and resulte is >>

$ python3 get-pip.py
Collecting pip
  Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:600)'),)': /simple/pip/
  Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:600)'),)': /simple/pip/
  Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:600)'),)': /simple/pip/
  Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:600)'),)': /simple/pip/
  Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:600)'),)': /simple/pip/
  Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:600)'),)) - skipping
  Could not find a version that satisfies the requirement pip (from versions: )
No matching distribution found for pip
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:600)'),)) - skipping

[pradyunsg]

Could you try:

python get-pip.py --trusted-host=pypi.python.org --trusted-host=pypi.org --trusted-host=files.pythonhosted.org

If even this doesn't work, are you behind a proxy?

[pradyunsg]

Closing due to a lack of a response + as a duplicate of #4459.

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.