ImportError: cannot import name HTTPSHandler using PIP

问题:

Facing an HTTPSHandler error while installing python packages using pip, following is the stack trace,

--------desktop:~$ pip install Django==1.3 Traceback (most recent call last):   File "/home/env/.genv/bin/pip", line 9, in      load_entry_point('pip==1.4.1', 'console_scripts', 'pip')()   File "/home/env/.genv/lib/python2.7/site-packages/pkg_resources.py", line 378, in load_entry_point     return get_distribution(dist).load_entry_point(group, name)   File "/home/env/.genv/lib/python2.7/site-packages/pkg_resources.py", line 2566, in load_entry_point     return ep.load()   File "/home/env/.genv/lib/python2.7/site-packages/pkg_resources.py", line 2260, in load     entry = __import__(self.module_name, globals(),globals(), ['__name__'])   File "/home/env/.genv/lib/python2.7/site-packages/pip/__init__.py", line 10, in      from pip.util import get_installed_distributions, get_prog   File "/home/env/.genv/lib/python2.7/site-packages/pip/util.py", line 17, in      from pip.vendor.distlib import version   File "/home/env/.genv/lib/python2.7/site-packages/pip/vendor/distlib/version.py", line 13, in      from .compat import string_types   File "/home/env/.genv/lib/python2.7/site-packages/pip/vendor/distlib/compat.py", line 31, in      from urllib2 import (Request, urlopen, URLError, HTTPError, ImportError: cannot import name HTTPSHandler

I used to edit Modules/setup.dist file and uncomment SSL code lines and rebuilt it, with reference to following thread : http://forums.opensuse.org/english/get-technical-help-here/applications/488962-opensuse-python-openssl-2.html

回答1:

OSX + homebrew users:

You can get the latest updates to the recipe:

brew reinstall python

But if you still get the issue, e.g. maybe you have upgraded your OS, then you may need to get the latest openssl first. You can check which version and where it is used from:

openssl version -a which openssl

To get the latest openssl:

brew update brew install openssl brew link --overwrite --dry-run openssl  # safety first. brew link openssl --overwrite

This may issue a warning:

bash-4.3$ brew link --overwrite --dry-run openssl Warning: Refusing to link: openssl Linking keg-only openssl means you may end up linking against the insecure, deprecated system OpenSSL while using the headers from Homebrew's openssl.  Instead, pass the full include/library paths to your compiler e.g.:  -I/usr/local/opt/openssl/include -L/usr/local/opt/openssl/lib

Side note: this warning means that for other apps, you may want to use

export LDFLAGS=-L/usr/local/opt/openssl/lib export CPPFLAGS=-I/usr/local/opt/openssl/include

Then recompile python:

brew uninstall python brew install python --with-brewed-openssl

or for python 3

brew uninstall python3 brew install python3 --with-brewed-openssl

回答2:

You need to install the OpenSSL header files before building Python if you need SSL support. On Debian and Ubuntu, they are in a package called libssl-dev. You might need some more dependencies, as noted here.

回答3:

Homebrew

This was probably caused by an upgrade to Mavericks. Here's how I fixed it.

Update OpenSSL

#make a copy of the existing library, just in case sudo cp /usr/bin/openssl /usr/bin/openssl.apple  # update openssl  brew update brew install openssl brew link --force openssl  # reload terminal paths hash -r

Reinstall Python

Python 3

brew uninstall python3  brew install python3 --with-brewed-openssl

Python 2

brew uninstall python  brew install python --with-brewed-openssl

This answer consolidates all the Stack Exchange answers and comments I found, and is based mostly on this Apple Stack Exchange answer.

回答4:

I was having this problem on Mac OSX, even after confirming my PATH, etc.

Did a; pip uninstall virtualenv then install virtualenv and it seemed to works now.

At the time I had forced brew to link openssl, unlinked it and virtualenv still seems to work but maybe that's because it was originally linked when I reinstalled it.

回答5:

You need to install OpenSSl before make and install Python to solve the problem.

On Centos:

yum install openssl openssl-devel -y

^source

回答6:

Another symptom of this problem for me was if I went into the python console of my virtualenv and did import ssl it would error out. Turns out my virtualenv wasn't using the brew version of python, just the default install on my machine. No clue why the default install suddenly stopped working, but here's how I fixed it the problem:

• rmvirtualenv myvirtualenv
• brew update
• brew reinstall python
• mkvirtualenv -p /usr/local/Cellar/python/whatever_version_number/bin/python myvirtualenv

回答7:

It seems your pip requires HTTPSHandler which is part of SSL library.

OSX

On OS X you should link OpenSSL during Python installation (See: #14497).

For Python 2:

brew reinstall python --with-brewed-openssl pip install --upgrade pip

For Python 3:

brew reinstall python3 --with-brewed-openssl pip3 install --upgrade pip

You could have multiple Python instances together, to list them run:

brew list | grep ^python

Or list your version via ls -al /usr/local/lib/python*.

回答8:

I'm using Redhat and have met the same problem.

My solution is :

1. install openssl and openssl-devel ---- yum install openssl openssl-devel -y
2. install krb5-devel ---- yum install krb5-devel
3. change to your python's directory and recompile it ---- make

If I didn't do the 2nd step, when I recompiled my python2.7 , the log would say " fail to build module _ssl".

回答9:

In many cases this is caused by an out of date virtualenv, here's a script to regenerate your virtualenv(s): https://gist.github.com/WoLpH/fb98f7dc6ba6f05da2b8

Simply copy it to a file (downloadable link above) and execute it like this: zsh -e recreate_virtualenvs.sh

#!/bin/zsh -e  if [ ! -d "$PROJECT_HOME" ]; then     echo 'Your $PROJECT_HOME needs to be defined'     echo 'http://virtualenvwrapper.readthedocs.org/en/latest/install.html#location-of-project-directories'     exit 1 fi  if [ "" = "$1" ]; then     echo "Usage: $0 "     exit 1 fi  env="$1" project_dir="$PROJECT_HOME/$1" env_dir="$HOME/envs/$1"  function command_exists(){     type $1 2>/dev/null | grep -vq ' not found' }  if command_exists workon; then     echo 'Getting virtualenvwrapper from environment'     # Workon exists, nothing to do :)  elif [ -x ~/bin/mount_workon ]; then     echo 'Using mount workon'     # Optional support for packaged project directories and virtualenvs using     # https://github.com/WoLpH/dotfiles/blob/master/bin/mount_workon     . ~/bin/mount_workon     mount_file "$project_dir"     mount_file "$env_dir"  elif command_exists virtualenvwrapper.sh; then     echo 'Using virtualenvwrapper'     . $(which virtualenvwrapper.sh) fi  if ! command_exists workon; then     echo 'Virtualenvwrapper not found, please install it'     exit 1 fi  rmvirtualenv $env || true  echo "Recreating $env" mkvirtualenv $env || true workon "$env" || true pip install virtualenv{,wrapper}  cd $project_dir setvirtualenvproject   if [ -f setup.py ]; then     echo "Installing local package"     pip install -e . fi  function install_requirements(){     # Installing requirements from given file, if it exists     if [ -f "$1" ]; then         echo "Installing requirements from $1"         pip install -r "$1"     fi }  install_requirements requirements_test.txt install_requirements requirements-test.txt install_requirements requirements.txt install_requirements test_requirements.txt install_requirements test-requirements.txt  if [ -d docs ]; then     echo "Found docs, installing sphinx"     pip install sphinx{,-pypi-upload} py fi  echo "Installing ipython" pip install ipython  if [ -f tox.ini ]; then     deps=$(python -c " parser=__import__('ConfigParser').ConfigParser(); parser.read('tox.ini'); print parser.get('testenv', 'deps').strip().replace('{toxinidir}/', '')")     echo "Found deps from tox.ini: $deps"     echo $deps | parallel -v --no-notice pip install {} fi  if [ -f .travis.yml ]; then     echo "Found deps from travis:"     installs=$(grep 'pip install' .travis.yml | grep -v '\$' | sed -e 's/.*pip install/pip install/' | grep -v 'pip install . --use-mirrors' | sed -e 's/$/;/')     echo $installs     eval $installs fi  deactivate

回答10:

On OSX, brew kept refusing to link against its openssl with this error:

15:27 $ brew link --force openssl Warning: Refusing to link: openssl Linking keg-only openssl means you may end up linking against the insecure, deprecated system OpenSSL while using the headers from Homebrew's openssl. Instead, pass the full include/library paths to your compiler e.g.:   -I/usr/local/opt/openssl/include -L/usr/local/opt/openssl/lib

I finally was able to get it working with:

  brew remove openssl   brew uninstall --force openssl   brew install openssl   export LDFLAGS=-L/usr/local/opt/openssl/lib   export CPPFLAGS=-I/usr/local/opt/openssl/include   brew remove python   brew update   brew install python

回答11:

For Ubuntu

First check wheather install openssl-develop

sudo apt-get install libssl-dev

Try another way to reinstall pip

sudo apt-get install python-setuptools sudo easy_install pip

use setuptools to install pip rather than install with source code may can solve the problem of dependency.

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