pipenv fails to install jupyterlab

Issue description

I run pipenv install jupyterlab It correctly installs v0.34.11 Gives this error:

Could not find a version that matches prompt-toolkit<2.0.0,<2.1.0,==1.0.15,>=1.0.15,>=2.0.0

While the tree pipenv graph shows prompt-toolkit only in two lines:

jupyterlab==0.34.11
  - jupyterlab-launcher [required: >=0.13.1,<0.14.0, installed: 0.13.1]
...
    - notebook [required: >=4.2.0, installed: 5.7.0]
...
          - prompt-toolkit [required: >=2.0.0,<2.1.0, installed: 2.0.4]
...
  - notebook [required: >=4.3.1, installed: 5.7.0]
...
        - prompt-toolkit [required: >=2.0.0,<2.1.0, installed: 2.0.4]
...

Expected result

Install without the weird version error

Actual result

see above.

Steps to replicate

create a new directory with python_version = "3.6" and run pipenv install jupyterlab

---

$ pipenv --support

Pipenv version: '2018.7.1'

Pipenv location: '/usr/local/Cellar/pipenv/2018.7.1/libexec/lib/python3.7/site-packages/pipenv'

Python location: '/usr/local/Cellar/pipenv/2018.7.1/libexec/bin/python3.7'

Other Python installations in PATH:

• 2.7: /usr/local/bin/python2.7

• 2.7: /usr/local/bin/python2.7

• 2.7: /usr/bin/python2.7

• 3.6: /Users/byakubchik/.local/share/virtualenvs/ml-with-python-and-keras-u1_RmhqT/bin/python3.6m

• 3.6: /Users/byakubchik/.local/share/virtualenvs/ml-with-python-and-keras-u1_RmhqT/bin/python3.6

• 3.6: /Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6

• 3.6: /usr/local/bin/python3.6

• 3.7: /Library/Frameworks/Python.framework/Versions/3.7/bin/python3.7m

• 3.7: /Library/Frameworks/Python.framework/Versions/3.7/bin/python3.7

• 3.7: /usr/local/bin/python3.7

• 3.6.4: /Users/byakubchik/.local/share/virtualenvs/ml-with-python-and-keras-u1_RmhqT/bin/python

• 2.7.15: /usr/local/bin/python

• 2.7.10: /usr/bin/python

• 2.7.15: /usr/local/bin/python2

• 3.6.4: /Users/byakubchik/.local/share/virtualenvs/ml-with-python-and-keras-u1_RmhqT/bin/python3

• 3.7.0: /Library/Frameworks/Python.framework/Versions/3.7/bin/python3

• 3.6.4: /Library/Frameworks/Python.framework/Versions/3.6/bin/python3

• 3.7.0: /usr/local/bin/python3

PEP 508 Information:

{'implementation_name': 'cpython',
 'implementation_version': '3.7.0',
 'os_name': 'posix',
 'platform_machine': 'x86_64',
 'platform_python_implementation': 'CPython',
 'platform_release': '17.7.0',
 'platform_system': 'Darwin',
 'platform_version': 'Darwin Kernel Version 17.7.0: Thu Jun 21 22:53:14 PDT '
                     '2018; root:xnu-4570.71.2~1/RELEASE_X86_64',
 'python_full_version': '3.7.0',
 'python_version': '3.7',
 'sys_platform': 'darwin'}

System environment variables:

• PATH
• TERM_PROGRAM
• NVM_CD_FLAGS
• PIP_PYTHON_PATH
• SHELL
• TERM
• TMPDIR
• Apple_PubSub_Socket_Render
• TERM_PROGRAM_VERSION
• ZSH
• USER
• NVM_DIR
• SSH_AUTH_SOCK
• __CF_USER_TEXT_ENCODING
• VIRTUAL_ENV
• PAGER
• LSCOLORS
• PIPENV_ACTIVE
• _
• PWD
• LANG
• XPC_FLAGS
• PYTHONDONTWRITEBYTECODE
• XPC_SERVICE_NAME
• HOME
• SHLVL
• LOGNAME
• LESS
• LC_CTYPE
• NVM_BIN
• DISPLAY
• COLORTERM

Pipenv–specific environment variables:

• PIPENV_ACTIVE: 1

Debug–specific environment variables:

• PATH: /usr/local/Cellar/pipenv/2018.7.1/libexec/tools:/Users/byakubchik/.local/share/virtualenvs/ml-with-python-and-keras-u1_RmhqT/bin:/usr/local/opt/opencv3/bin:/usr/local/Cellar/pipenv/2018.7.1/libexec/tools:/usr/local/opt/opencv3/bin:/Users/byakubchik/.nvm/versions/node/v8.11.2/bin:/Library/Frameworks/Python.framework/Versions/3.7/bin:/Library/Frameworks/Python.framework/Versions/3.6/bin:/Library/Frameworks/Python.framework/Versions/2.7/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:~/.composer/vendor/bin:/Library/TeX/texbin:/usr/local/go/bin:/opt/X11/bin
• SHELL: /bin/zsh
• LANG: en_US.UTF-8
• PWD: /Users/byakubchik/Desktop/myML/ml-with-python-and-keras
• VIRTUAL_ENV: /Users/byakubchik/.local/share/virtualenvs/ml-with-python-and-keras-u1_RmhqT

---

Contents of Pipfile (‘/Users/byakubchik/Desktop/myML/ml-with-python-and-keras/Pipfile’):

[[source]]
url = "https://pypi.org/simple"
verify_ssl = true
name = "pypi"

[packages]
jupyterlab = "*"

[dev-packages]
black = "*"
pylint = "*"

[requires]
python_version = "3.6"

[pipenv]
allow_prereleases = true

[wpsamurai]

Same issue as well.

As a workaround you can install ipython==6.5.0 first and after that jupyter:

pipenv install ipython==6.5.0
pipenv install jupyter

[ociule]

I’ve also seen this on the latest pipenv master, unfortunately.

I have not undertaken the effort to find a minimal reproducing example so I have several occurences of prompt-toolkit.

λ pipenv graph | grep prompt
      - prompt-toolkit [required: >=1.0.15,<2.0.0, installed: 1.0.15]
    - prompt-toolkit [required: >=1.0.15,<2.0.0, installed: 1.0.15]
          - prompt-toolkit [required: >=1.0.15,<2.0.0, installed: 1.0.15]
      - prompt-toolkit [required: >=1.0.15,<2.0.0, installed: 1.0.15]
    - prompt-toolkit [required: >=1.0.15,<2.0.0, installed: 1.0.15]
  - prompt-toolkit [required: >=1.0.0,<2.0.0, installed: 1.0.15]
      - prompt-toolkit [required: >=1.0.15,<2.0.0, installed: 1.0.15]

This is after doing pip install --dev --skip-lock

@whyboris you can use pip install --skip-lock as a temporary solution.