Deployment Error

[dennishumes]

got the following error in attempting to deploy:-
Invalid requirement: 'aniso8601 (1.1.0)'
Traceback (most recent call last):
File "/app/.heroku/python/lib/python3.6/site-packages/pip/_vendor/packaging/requirements.py", line 92, in init
req = REQUIREMENT.parseString(requirement_string)
File "/app/.heroku/python/lib/python3.6/site-packages/pip/_vendor/pyparsing.py", line 1617, in parseString
raise exc
File "/app/.heroku/python/lib/python3.6/site-packages/pip/_vendor/pyparsing.py", line 1607, in parseString
loc, tokens = self._parse( instring, 0 )
File "/app/.heroku/python/lib/python3.6/site-packages/pip/_vendor/pyparsing.py", line 1379, in _parseNoCache
loc,tokens = self.parseImpl( instring, preloc, doActions )
File "/app/.heroku/python/lib/python3.6/site-packages/pip/_vendor/pyparsing.py", line 3376, in parseImpl
loc, exprtokens = e._parse( instring, loc, doActions )
File "/app/.heroku/python/lib/python3.6/site-packages/pip/_vendor/pyparsing.py", line 1383, in _parseNoCache
loc,tokens = self.parseImpl( instring, preloc, doActions )
File "/app/.heroku/python/lib/python3.6/site-packages/pip/_vendor/pyparsing.py", line 3164, in parseImpl
raise ParseException(instring, loc, self.errmsg, self)
pip._vendor.pyparsing.ParseException: Expected stringEnd (at char 10), (line:1, col:11)

   During handling of the above exception, another exception occurred:
   
   Traceback (most recent call last):
     File "/app/.heroku/python/lib/python3.6/site-packages/pip/req/req_install.py", line 82, in __init__
       req = Requirement(req)
     File "/app/.heroku/python/lib/python3.6/site-packages/pip/_vendor/packaging/requirements.py", line 96, in __init__
       requirement_string[e.loc:e.loc + 8]))
   pip._vendor.packaging.requirements.InvalidRequirement: Invalid requirement, parse error at "'(1.1.0)'"

! Push rejected, failed to compile Python app.
! Push failed

[cheikhnadiouf]

Some hosting services like heroku if i remembered require a special procedure when you get an Error parsing in requirements.txt
As you can see in README.md a section called "TROUBLESHOOTS" is talking about that (maybe it will help you to fix this issue) :

- Error parsing in requirements.txt ?
Run instead this compatible formatted file :
python -m pip install -r requirements-pip2.txt
or convert first your requirements.txt to a python 2 pip2 compatible format with this command :
python -m pip list --format=freeze > requirements.txt