Pip3 breaks after pipenv install

I have an issue where after a local install of pipenv, whenever I try to use the pip3 command it throws errors.

I’m not sure if this is an issue with pipenv itself, the Ubuntu distribution’s pip3 package, pip itself, or something I’m doing wrong, but it does seem to occur immediately after the pipenv isntall

I’m testing using Vagrant, and have tried to simplify the steps to reproduce (from a vanilla VM below)

Expected result

The system pip3 command to work after a local/user install of pipenv. e.g.

vagrant@ubuntu-artful:~$ pip3 --version
pip 9.0.1 from /usr/lib/python3/dist-packages (python 3.6)

Actual result

The system pip3 throws errors such as:

vagrant@ubuntu-artful:~$ pip3 --version
Traceback (most recent call last):
  File "/usr/bin/pip3", line 9, in <module>
    from pip import main
ImportError: cannot import name 'main'

Steps to replicate

# On vanilla Ubuntu 17.10 Vagrant VM -> Update package lists and install Pip3
sudo apt-get update && sudo apt-get install --assume-yes python3-pip

# Log Pip3 info
pip3 --version  # outputs: pip 9.0.1 from /usr/lib/python3/dist-packages (python 3.6)
which pip3  # outputs: /usr/bin/pip3

# Install pipenv as user
pip3 install --user pipenv 

# Log Pip3 info
pip3 --version  # throws traceback above
which pip3  # outputs: /usr/bin/pip3

Full logs of steps to replicate:

sudo apt-get update && sudo apt-get install --assume-yes python3-pip

vagrant@ubuntu-artful:~$ # Update OS and install Pip3
vagrant@ubuntu-artful:~$ sudo apt-get update && sudo apt-get install --assume-yes python3-pip
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Reading package lists... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  binutils binutils-common binutils-x86-64-linux-gnu build-essential cpp cpp-7 dpkg-dev fakeroot g++ g++-7 gcc gcc-7
  libalgorithm-diff-perl libalgorithm-diff-xs-perl libalgorithm-merge-perl libasan4 libatomic1 libbinutils libc-dev-bin
  libc6-dev libcc1-0 libcilkrts5 libdpkg-perl libexpat1-dev libfakeroot libfile-fcntllock-perl libgcc-7-dev libgomp1
  libisl15 libitm1 liblsan0 libmpc3 libmpx2 libpython3-dev libpython3.6-dev libquadmath0 libstdc++-7-dev libtsan0
  libubsan0 linux-libc-dev make manpages-dev python-pip-whl python3-crypto python3-dev python3-keyring
  python3-keyrings.alt python3-secretstorage python3-setuptools python3-wheel python3-xdg python3.6-dev
Suggested packages:
  binutils-doc cpp-doc gcc-7-locales debian-keyring g++-multilib g++-7-multilib gcc-7-doc libstdc++6-7-dbg gcc-multilib
  autoconf automake libtool flex bison gdb gcc-doc gcc-7-multilib libgcc1-dbg libgomp1-dbg libitm1-dbg libatomic1-dbg
  libasan4-dbg liblsan0-dbg libtsan0-dbg libubsan0-dbg libcilkrts5-dbg libmpx2-dbg libquadmath0-dbg glibc-doc
  libstdc++-7-doc make-doc python3-crypto-dbg python-crypto-doc gnome-keyring libkf5wallet-bin gir1.2-gnomekeyring-1.0
  python-secretstorage-doc python-setuptools-doc
The following NEW packages will be installed:
  binutils binutils-common binutils-x86-64-linux-gnu build-essential cpp cpp-7 dpkg-dev fakeroot g++ g++-7 gcc gcc-7
  libalgorithm-diff-perl libalgorithm-diff-xs-perl libalgorithm-merge-perl libasan4 libatomic1 libbinutils libc-dev-bin
  libc6-dev libcc1-0 libcilkrts5 libdpkg-perl libexpat1-dev libfakeroot libfile-fcntllock-perl libgcc-7-dev libgomp1
  libisl15 libitm1 liblsan0 libmpc3 libmpx2 libpython3-dev libpython3.6-dev libquadmath0 libstdc++-7-dev libtsan0
  libubsan0 linux-libc-dev make manpages-dev python-pip-whl python3-crypto python3-dev python3-keyring
  python3-keyrings.alt python3-pip python3-secretstorage python3-setuptools python3-wheel python3-xdg python3.6-dev
0 upgraded, 53 newly installed, 0 to remove and 29 not upgraded.
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pip3 --version; which pip3 # pre pipenv install

vagrant@ubuntu-artful:~$ # Log Pip3 info before pipenv install
vagrant@ubuntu-artful:~$ pip3 --version
pip 9.0.1 from /usr/lib/python3/dist-packages (python 3.6)
vagrant@ubuntu-artful:~$ which pip3
/usr/bin/pip3

pip3 install --user pipenv

vagrant@ubuntu-artful:~$ # Install pipenv as user
vagrant@ubuntu-artful:~$ pip3 install --user pipenv
Collecting pipenv
  Downloading https://files.pythonhosted.org/packages/2c/01/37a5867a47d52856b077d0faa561b791cb6e6e3e9410837b6d62f569c1e6/pi
penv-11.10.1-py3-none-any.whl (6.3MB)
    100% |████████████████████████████████| 6.3MB 194kB/s
Collecting virtualenv-clone>=0.2.5 (from pipenv)
  Downloading https://files.pythonhosted.org/packages/6d/c2/dccb5ccf599e0c5d1eea6acbd058af7a71384f9740179db67a9182a24798/vi
rtualenv_clone-0.3.0-py2.py3-none-any.whl
Collecting certifi (from pipenv)
  Downloading https://files.pythonhosted.org/packages/7c/e6/92ad559b7192d846975fc916b65f667c7b8c3a32bea7372340bfe9a15fa5/ce
rtifi-2018.4.16-py2.py3-none-any.whl (150kB)
    100% |████████████████████████████████| 153kB 7.0MB/s
Collecting setuptools>=36.2.1 (from pipenv)
  Downloading https://files.pythonhosted.org/packages/8c/10/79282747f9169f21c053c562a0baa21815a8c7879be97abd930dbcf862e8/se
tuptools-39.1.0-py2.py3-none-any.whl (566kB)
    100% |████████████████████████████████| 573kB 2.3MB/s
Collecting pip>=9.0.1 (from pipenv)
  Downloading https://files.pythonhosted.org/packages/0f/74/ecd13431bcc456ed390b44c8a6e917c1820365cbebcb6a8974d1cd045ab4/pi
p-10.0.1-py2.py3-none-any.whl (1.3MB)
    100% |████████████████████████████████| 1.3MB 1.0MB/s
Collecting virtualenv (from pipenv)
  Downloading https://files.pythonhosted.org/packages/ed/ea/e20b5cbebf45d3096e8138ab74eda139595d827677f38e9dd543e6015bdf/vi
rtualenv-15.2.0-py2.py3-none-any.whl (2.6MB)
    100% |████████████████████████████████| 2.6MB 397kB/s
Installing collected packages: virtualenv-clone, certifi, setuptools, pip, virtualenv, pipenv
Successfully installed certifi-2018.4.16 pip-10.0.1 pipenv-11.10.1 setuptools-39.1.0 virtualenv-15.2.0 virtualenv-clone-0.3
.0

pip3 --version; which pip3 # post pipenv install

vagrant@ubuntu-artful:~$ # Log Pip3 info after pipenv install
vagrant@ubuntu-artful:~$ pip3 --version
which pip3Traceback (most recent call last):
  File "/usr/bin/pip3", line 9, in <module>
    from pip import main
ImportError: cannot import name 'main'
vagrant@ubuntu-artful:~$ which pip3
/usr/bin/pip3

Environment:

• Ubuntu 17.10 (running under Vagrant)

$ python -m pipenv.help output

Pipenv version: '11.10.1'

Pipenv location: '/home/vagrant/.local/lib/python3.6/site-packages/pipenv'

Python location: '/usr/bin/python3'

Other Python installations in PATH:

• 3.6: /usr/bin/python3.6m

• 3.6: /usr/bin/python3.6

• 3.6.3: /usr/bin/python3

PEP 508 Information:

{'implementation_name': 'cpython',
 'implementation_version': '3.6.3',
 'os_name': 'posix',
 'platform_machine': 'x86_64',
 'platform_python_implementation': 'CPython',
 'platform_release': '4.13.0-38-generic',
 'platform_system': 'Linux',
 'platform_version': '#43-Ubuntu SMP Wed Mar 14 15:20:44 UTC 2018',
 'python_full_version': '3.6.3',
 'python_version': '3.6',
 'sys_platform': 'linux'}

System environment variables:

• LS_COLORS
• SSH_CONNECTION
• LESSCLOSE
• LANG
• XDG_SESSION_ID
• USER
• PWD
• HOME
• SSH_CLIENT
• XDG_DATA_DIRS
• SSH_TTY
• MAIL
• TERM
• SHELL
• SHLVL
• LOGNAME
• XDG_RUNTIME_DIR
• PATH
• LESSOPEN
• _
• PYTHONDONTWRITEBYTECODE
• PIP_PYTHON_PATH

Pipenv–specific environment variables:

Debug–specific environment variables:

• PATH: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
• SHELL: /bin/bash
• LANG: C.UTF-8
• PWD: /home/vagrant

---

[techalchemy]

pip3 install --user pipenv … Collecting pip>=9.0.1 (from pipenv) Downloading https://files.pythonhosted.org/packages/0f/74/ecd13431bcc456ed390b44c8a6e917c1820365cbebcb6a8974d1cd045ab4/pip-10.0.1-py2.py3-none-any.whl (1.3MB) … Successfully installed certifi-2018.4.16 pip-10.0.1 pipenv-11.10.1 setuptools-39.1.0 virtualenv-15.2.0 virtualenv-clone-0.3.0

The user installation of pipenv also installed pip, and pip 10 isn’t compatible with pip 9 – your executable path might point at /usr/bin/pip, but your python path is looking in your user site packages for pip when it does the import. You need to add to your bashrc/adjust your path however you like with the following: export PATH="${HOME}/.local/bin:$PATH"

Sorry for the confusion! Distribution packaged pip versions cause a lot more headaches than they are worth.

[Nditah]

Please simply reinstall pip3:

sudo python3 -m pip uninstall pip && sudo apt install python3-pip --reinstall