Error while setting up the environment

[Animesh Singh Chouhan]

**OS : ** Ubuntu 16.04

Commands given :

sudo pip install pipenv
pipenv install requirements.txt 

Error :

Successfully installed certifi-2018.11.29 pipenv-2018.11.26 virtualenv-clone-0.4.0
animesh@lucifer:~/python/TextExtractor-master$ pipenv install requirements.txt 
Creating a virtualenv for this project…
Pipfile: /home/animesh/python/TextExtractor-master/Pipfile
Using /usr/bin/python3.5m (3.5.2) to create virtualenv…
⠹ Creating virtual environment...Using base prefix '/usr'
New python executable in /home/animesh/.local/share/virtualenvs/TextExtractor-master-79x26G_s/bin/python3.5m
Also creating executable in /home/animesh/.local/share/virtualenvs/TextExtractor-master-79x26G_s/bin/python
Installing setuptools, pip, wheel...done.
Running virtualenv with interpreter /usr/bin/python3.5m

✔ Successfully created virtual environment! 
Virtualenv location: /home/animesh/.local/share/virtualenvs/TextExtractor-master-79x26G_s
Installing requirements.txt…
Adding requirements.txt to Pipfile's [packages]…
✔ Installation Succeeded 
Pipfile.lock (2517dc) out of date, updating to (4146aa)…
Locking [dev-packages] dependencies…
Locking [packages] dependencies…
✘ Locking Failed! 
[pipenv.exceptions.ResolutionFailure]:   File "/usr/local/lib/python3.5/dist-packages/pipenv/resolver.py", line 69, in resolve
[pipenv.exceptions.ResolutionFailure]:       req_dir=requirements_dir
[pipenv.exceptions.ResolutionFailure]:   File "/usr/local/lib/python3.5/dist-packages/pipenv/utils.py", line 726, in resolve_deps
[pipenv.exceptions.ResolutionFailure]:       req_dir=req_dir,
[pipenv.exceptions.ResolutionFailure]:   File "/usr/local/lib/python3.5/dist-packages/pipenv/utils.py", line 480, in actually_resolve_deps
[pipenv.exceptions.ResolutionFailure]:       resolved_tree = resolver.resolve()
[pipenv.exceptions.ResolutionFailure]:   File "/usr/local/lib/python3.5/dist-packages/pipenv/utils.py", line 395, in resolve
[pipenv.exceptions.ResolutionFailure]:       raise ResolutionFailure(message=str(e))
[pipenv.exceptions.ResolutionFailure]:       pipenv.exceptions.ResolutionFailure: ERROR: ERROR: Could not find a version that matches requirements-txt
[pipenv.exceptions.ResolutionFailure]:       No versions found
[pipenv.exceptions.ResolutionFailure]: Warning: Your dependencies could not be resolved. You likely have a mismatch in your sub-dependencies.
  First try clearing your dependency cache with $ pipenv lock --clear, then try the original command again.
 Alternatively, you can use $ pipenv install --skip-lock to bypass this mechanism, then run $ pipenv graph to inspect the situation.
  Hint: try $ pipenv lock --pre if it is a pre-release dependency.
ERROR: ERROR: Could not find a version that matches requirements-txt
No versions found
Was https://pypi.org/simple reachable?
[pipenv.exceptions.ResolutionFailure]:       req_dir=requirements_dir
[pipenv.exceptions.ResolutionFailure]:   File "/usr/local/lib/python3.5/dist-packages/pipenv/utils.py", line 726, in resolve_deps
[pipenv.exceptions.ResolutionFailure]:       req_dir=req_dir,
[pipenv.exceptions.ResolutionFailure]:   File "/usr/local/lib/python3.5/dist-packages/pipenv/utils.py", line 480, in actually_resolve_deps
[pipenv.exceptions.ResolutionFailure]:       resolved_tree = resolver.resolve()
[pipenv.exceptions.ResolutionFailure]:   File "/usr/local/lib/python3.5/dist-packages/pipenv/utils.py", line 395, in resolve
[pipenv.exceptions.ResolutionFailure]:       raise ResolutionFailure(message=str(e))
[pipenv.exceptions.ResolutionFailure]:       pipenv.exceptions.ResolutionFailure: ERROR: ERROR: Could not find a version that matches requirements-txt
[pipenv.exceptions.ResolutionFailure]:       No versions found
[pipenv.exceptions.ResolutionFailure]: Warning: Your dependencies could not be resolved. You likely have a mismatch in your sub-dependencies.
  First try clearing your dependency cache with $ pipenv lock --clear, then try the original command again.
 Alternatively, you can use $ pipenv install --skip-lock to bypass this mechanism, then run $ pipenv graph to inspect the situation.
  Hint: try $ pipenv lock --pre if it is a pre-release dependency.
ERROR: ERROR: Could not find a version that matches requirements-txt
No versions found
Was https://pypi.org/simple reachable?

[Yash Sharma]

Try using ,
pip install -r requirements.txt, this should work