Pipenv can't find a matched version of dependency

Issue description

pipenv graph is empty

python version : 3.5.2 pipenv, version 2018.10.13

Here is my requirements.txt

alabaster
APScheduler
attrs
Automat
Babel
backports.functools-lru-cache
backports.weakref
beautifulsoup4
bleach
boto3
botocore
bz2file
cachetools
certifi
chardet
cloudpickle
configparser
constantly
cycler
cytoolz
decorator
dill
Django
django-allauth
django-appconf
django-celery-email
django-cors-headers
django-environ
django-imagekit
django-nested-inline
django-queryset-csv
django-rest-auth
django-rest-swagger
django-sse-wrapper
djangorestframework
djangorestframework-jwt
docopt
docutils
entrypoints
enum34
fakeredis
feedparser
firebase-admin
freeze
ftfy
future
gevent
google-api-python-client
google-auth
google-auth-httplib2
graphviz
greenlet
h5py
html2text
html5lib
httplib2
idna
imagesize
incremental
ipython-genutils
Jinja2
jmespath
jsonpickle
jsonschema
jupyter-core
Keras
Markdown
MarkupSafe
maya
metadata-parser
microdata
mistune
mock
mongoengine
msgpack
msgpack-numpy
msgpack-python
murmurhash
nbconvert
nbformat
nbsphinx
networkx
newsapi-python
newspaper3k
nose
numpy
oauth2client
oauthlib
pandoc
pandocfilters
pathlib
pbr
plac
ply
prawcore
preshed
protobuf
pyasn1
pyasn1-modules
pycrypto
pyfav
Pygments
pykwalify
PyLD
pymessenger
pyparsing
python-dateutil
python-dotenv
pytz
PyYAML
rasa-core
rauth
redis
regex
requests
requests-oauthlib
requests-toolbelt
rsa
s3transfer
schedule
scipy
simplejson
six
snowballstemmer
spacy
Sphinx
sphinxcontrib-websupport
tensorflow
termcolor
testpath
thinc
toolz
tqdm
traitlets
typing
tzlocal
update-checker
uritemplate
urllib3
virtualenv
wcwidth
webencodings
Werkzeug
wrapt
xmltodict
zope.interface

Describe the issue briefly here.

I get

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.
Could not find a version that matches requests<3.0,<3.0.0,==2.17.1,>=1.2.3,>=2.0.0,>=2.0.1,>=2.1.0,>=2.10.0,>=2.13.0,>=2.19.1,>=2.3.0,>=2.6.0,~=2.15

Expected result

pip freeze show something…

Actual result

pip freeze is empty

I also tried --skip-lock. But pip freeze was empty

Steps to replicate

sudo pipenv install -r requirements.txt

Related closed issues : #1598 #2258

[cegprakash]

I removed both of them but now I get

Could not find a version that matches numpy<=1.14.5,>=1.12.0,>=1.13,>=1.13.3,>=1.15.0,>=1.7,>=1.7.0,>=1.8.2,>=1.9.0,>=1.9.1,~=1.14

[frostming]

metadata-parser
newsapi-python

@cegprakash