pip issue installing almost any library

Question

I have a difficult time using pip to install almost anything  I m new to coding  so I thought maybe this is something I ve been doing wrong and have opted out to easy install to get most of what I needed done  which has generally worked  However  now I m trying to download the nltk library  and neither is getting the job done   I tried entering  sudo pip install nltk   but got the following response    Library Frameworks Python framework Versions 2 7 bin pip run on Sat May  4 00 15 38 2013 Downloading unpacking nltk    Getting page https   pypi python org simple nltk    Could not fetch URL  need more reputation to post link   There was a problem confirming the ssl certificate   lt urlopen error  Errno 1   ssl c 504  error 0D0890A1 asn1 encoding routines ASN1 verify unknown message digest algorithm gt     Will skip URL  need more reputation to post link  simple nltk  when looking for download links for nltk    Getting page  need more reputation to post link  simple    Could not fetch URL https   pypi python  org simple   There was a problem confirming the ssl certificate   lt urlopen error  Errno 1   ssl c 504  error 0D0890A1 asn1 encoding routines ASN1 verify unknown message digest algorithm gt     Will skip URL  need more reputation to post link  when looking for download links for nltk    Cannot fetch index base URL  need more reputation to post link     URLs to search for versions for nltk       need more reputation to post link    Getting page  need more reputation to post link    Could not fetch URL  need more reputation to post link   There was a problem confirming the ssl certificate   lt urlopen error  Errno 1   ssl c 504  error 0D0890A1 asn1 encoding routines ASN1 verify unknown message digest algorithm gt     Will skip URL  need more reputation to post link  when looking for download links for nltk    Could not find any downloads that satisfy the requirement nltk  No distributions at all found for nltk  Exception information  Traceback  most recent call last     File   Library Frameworks Python framework Versions 2 7 lib python2 7 site-packages pip-1 3 1-py2 7 egg pip basecommand py   line 139  in main     status   self run options  args    File   Library Frameworks Python framework Versions 2 7 lib python2 7 site-packages pip-1 3 1-py2 7 egg pip commands install py   line 266  in run     requirement set prepare files finder  force root egg info self bundle  bundle self bundle    File   Library Frameworks Python framework Versions 2 7 lib python2 7 site-packages pip-1 3 1-py2 7 egg pip req py   line 1026  in prepare files     url   finder find requirement req to install  upgrade self upgrade    File   Library Frameworks Python framework Versions 2 7 lib python2 7 site-packages pip-1 3 1-py2 7 egg pip index py   line 171  in find requirement     raise DistributionNotFound  No distributions at all found for  s    req  DistributionNotFound  No distributions at all found for nltk  --easy install installed fragments of the library and the code ran into trouble very quickly upon trying to run it    Any thoughts on this issue  I d really appreciate some feedback on how I can either get pip working or something to get around the issue in the meantime

User · Answer

I solved this issue with the following steps (on sles 11sp2)

zypper remove pip
easy_install pip=1.2.1
pip install --upgrade scons

Here are the same steps in puppet (which should work on all distros)

  package { 'python-pip':
    ensure => absent,
  }
  exec { 'python-pip':
    command  => '/usr/bin/easy_install pip==1.2.1',
    require  => Package['python-pip'],
  }
  package { 'scons': 
    ensure   => latest,
    provider => pip,
    require  => Exec['python-pip'],
  }

User · Answer

For me  the latest pip  1 5 6  works fine with the insecure nltk package if you just tell it not to be so picky about security   pip install --upgrade --force-reinstall --allow-all-external --allow-unverified ntlk nltk

User · Answer

I used pip3 version 9 0 1 and was unable to install any packages recently via the commandpip3 install    Mac os version  EI Captain 10 11 5    python version  3 5  I tried the command   curl https   bootstrap pypa io get-pip py   python  It didn t work for me   So I uninstalled the older pip and installed the newest version10 0 0 by entering this   python3 -m pip uninstall pip setuptools curl https   bootstrap pypa io get-pip py   python3   Now my problem was solved  If you are using the python2  you can substitute the python3 with python  I hope it also works for you   By the way  for some rookies like me  you have to enter the code  sudo -i  to gain the root right    Good luck

User · Answer

Another cause of SSL errors can be a bad system time     certificates won t validate if it s too far off from the present

User · Answer

Pypi removed support for TLS versions less than 1 2  You need to re-install Pip  do   curl https   bootstrap pypa io get-pip py   python   or for global Python   curl https   bootstrap pypa io get-pip py   sudo python

User · Answer

Just uninstall and reinstall pip packages it will workout for you guys   Mac os version  high Sierra 10 13 6  python version  3 7  So I uninstalled the older pip and installed the newest version10 0 0 by entering this   python3 -m pip uninstall pip setuptools  curl https   bootstrap pypa io get-pip py   python3   Now my problem was solved  If you are using the python2  you can substitute the python3 with python  I hope it also works for you

User · Answer

macOS Sierra 10 12 6  Wasn t able to install anything through pip  python installed through homebrew   All the answers above didn t work   Eventually  upgrade from python 3 5 to 3 6 worked    brew update brew doctor   in case you see such suggestion by brew    then follow any additional suggestions by brew  i e  overwrite link to python

User · Answer

You can also use conda to install packages   See http   conda pydata org  conda install nltk  The best way to use conda is to download Miniconda  but you can also try   pip install conda conda init conda install nltk

User · Answer

I had this with PyCharm and upgrading pip to 10 0 1 broke pip with   main  not found in module  error    I could solve this problem by installing pip 9 0 3 as seen in some other thread  These are the steps I did    Downloaded 9 0 3 version of pip from https   pypi org simple pip   since pip couldn t be used to install it   Install pip 9 0 3 from tar gz python -m pip install pip-9 0 3 tar gz   Everything started to work after that

User · Answer

Solution - Install any package by marking below hosts trusted   pypi python org pypi org files pythonhosted org   Temporary solution   pip install --trusted-host pypi python org --trusted-host pypi org --trusted-host files pythonhosted org  package name    Permanent solution - Update your PIP problem with version 9 0 1  to latest   pip install --trusted-host pypi python org --trusted-host pypi org --trusted-host files pythonhosted org pytest-xdist  python -m pip install --trusted-host pypi python org --trusted-host pypi org --trusted-host files pythonhosted org --upgrade pip

User · Answer

To install any other package I have to use the latest version of pip  since the 9 0 1 has this SSL problem  To upgrade the pip by pip itself  I have to solve this SSL problem first  To jump out of this endless loop  I find this only way that works for me    Find the latest version of pip in this page  https   pypi org simple pip   Download the  whl file of the latest version  Use pip to install the latest pip   Use your own latest version here       sudo pip install pip-10 0 1-py2 py3-none-any whl   Now the pip is the latest version and can install anything

User · Answer

I found it sufficient to specify the pypi host as trusted  Example    pip install --trusted-host pypi python org pytest-xdist pip install --trusted-host pypi python org --upgrade pip   This solved the following error      Could not fetch URL https   pypi python org simple pytest-cov   There was a problem confirming the ssl certificate   SSL  CERTIFICATE VERIFY FAILED  certificate verify failed   ssl c 600  - skipping   Could not find a version that satisfies the requirement pytest-cov  from versions    No matching distribution found for pytest-cov   Update April 2018  To anyone getting the TLSV1 ALERT PROTOCOL VERSION error  it has nothing to do with trusted-host verification issue of the OP or this answer  Rather the TLSV1 error is because your interpreter does not support TLS v1 2  you must upgrade your interpreter  See for example https   news ycombinator com item id 13539034  http   pyfound blogspot ca 2017 01 time-to-upgrade-your-python-tls-v12 html and https   bugs python org issue17128    Update Feb 2019  For some it may be sufficient to upgrade pip  If the above error prevents you from doing this  use get-pip py  E g  on Linux    curl https   bootstrap pypa io get-pip py sudo python get-pip py   More details at https   pip pypa io en stable installing

User · Answer

I used pip version 9 0 1 and had the same issue  all the answers above didn t solve the problem  and I couldn t install python   pip with brew for other reasons   Upgrading pip to 9 0 3 solved the problem  And because I couldn t upgrade pip with pip I downloaded the source and installed it manually    Download the correct version of pip from - https   pypi org simple pip  sudo python3 pip-9 0 3 tar gz - Install pip   Or you can install newer pip with   curl https   bootstrap pypa io get-pip py   python

User · Answer

If it is only about nltk  I once faced similar problem  Try following guide for installation   Install NLTK  If you are sure it doesn t work with any other module  you may have problem with different versions of Python installed   Or Give It a Try to see if it says pip is already installed    sudo apt-get install python-pip python-dev build-essential    and see if it works

User · Answer

I did the following on Windows 7 to solve this problem   c  Program Files Python36 Scripts  pip install beautifulsoup4 --trusted-host    The --trusted-host seems to fix the SSL issue and   means every host   Of course this does not work because you get other errors since there is no version that satisfies the requirement beautifulsoup4  but I don t think that issue is related to the general question

User · Answer

Use Latest version of python on mac Python 2 7 15rc1 https   bugs python org issue17128

User · Answer

You re probably seeing this bug  see also here   The easiest workaround is to downgrade pip to one that doesn t use SSL  easy install pip  1 2 1  This loses you the security benefit of using SSL  The real solution is to use a Python distribution linked to a more recent SSL library

User · Answer

This video tutorial worked for me     curl https   bootstrap pypa io get-pip py   python

User · Answer

If you re connecting through a proxy  execute export https proxy  lt your proxy gt   on Unix or Git Bash  and then retry installation    If you re using Windows cmd  this changes to set https proxy  lt your proxy gt

User · Answer

I solved this issue by update Python3 Virtualenv on my mac  I reference the site https   gist github com pandafulmanda 730a9355e088a9970b18275cb9eadef3 brew install python3 pip3 install virtualenv

User · Answer

As posted above by blackjar  the below lines worked for me  pip --trusted-host pypi python org --trusted-host files pythonhosted org --trusted-host pypi org install xxx   You need to give all three --trusted-host options  I was trying with only the first one after looking at the answers but it didn t work for me like that

User · Answer

I solved a similar problem by adding the --trusted-host pypi python org option

User · Answer

tried   pip --trusted-host pypi python org --trusted-host files pythonhosted org --trusted-host pypi org install xxx    and finally worked out  not quite understand why the domain pypi python org is changed

User · Answer

The only solution that worked for me is   sudo curl https   bootstrap pypa io get-pip py   sudo python

User · Answer

I had the same problem  I just updated the python from 2 7 0 to 2 7 15  It solves the problem   You can download here

User · Answer

I tried some of the popular answers  but still could not install any libraries packages using pip install  My specific error was  SSLError SSLCertVerificationError 1    SSL  CERTIFICATE VERIFY FAILED  certificate verify failed  self signed certificate in certificate chain using Miniconda for Windows  installer Miniconda3-py37 4 8 3-Windows-x86 exe   It finally works when I did this  pip install -r requirements txt --trusted-host pypi org --trusted-host pypi python org --trusted-host files pythonhosted org Specifically  I added this to make it work  --trusted-host pypi org --trusted-host pypi python org --trusted-host files pythonhosted org

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