heroku/python buildpack for node.js app get rejected - node.js

Question

I have an Node.js app with Python scripts that I am trying to deploy to Heroku.
Every time I try to add the heroku/python buildpack the git push gets rejected.
remote: Could not find a version that satisfies the requirement pywin32==224 (from -r /tmp/build_ebad00f3b8d3c9b4b03965f0d0924e7a/requirements.txt (line 57)) (from versions: )
remote: No matching distribution found for pywin32==224 (from -r /tmp/build_ebad00f3b8d3c9b4b03965f0d0924e7a/requirements.txt (line 57))
remote: ! Push rejected, failed to compile Python app.
remote:
remote: ! Push failed
remote: ! Push failed
remote: Verifying deploy...
remote:
remote: ! Push rejected to XXXXXX
remote:
To https://git.heroku.com/xxxxxx.git
! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/xxxxx.git'
Without the heroku/python buildpack the push works fine. I think I need that buildback for my Python scripts work on web.
My app runs fine locally but everything related to Python is not working when deployed. I use Python 3.7.3 64-bit version.
I have runtime.txt and requirements.txt in root of my app.
My runtime.txt file:
python-3.7.3
requirements.txt:
altgraph==0.16.1
asn1crypto==0.24.0
astroid==2.1.0
awscli==1.16.209
beautifulsoup4==4.6.3
botocore==1.12.199
bs4==0.0.1
cached-property==1.5.1
cachetools==3.1.1
certifi==2019.6.16
cffi==1.12.2
chardet==3.0.4
colorama==0.3.9
cryptography==2.6.1
defusedxml==0.5.0
dnspython==1.16.0
docutils==0.14
et-xmlfile==1.0.1
exchangelib==1.12.2
future==0.17.1
google-api-python-client==1.7.9
google-auth==1.6.3
google-auth-httplib2==0.0.3
google-auth-oauthlib==0.4.0
googletrans==2.4.0
gspread==3.1.0
httplib2==0.13.0
idna==2.8
isodate==0.6.0
isort==4.3.4
jdcal==1.4
jmespath==0.9.4
lazy-object-proxy==1.3.1
lxml==4.3.2
macholib==1.11
mccabe==0.6.1
ntlm-auth==1.2.0
numpy==1.15.4
oauth2client==4.1.3
oauthlib==3.0.1
openpyxl==2.6.0
pandas==0.23.4
pefile==2018.8.8
py2exe==0.9.2.2
pyasn1==0.4.5
pyasn1-modules==0.2.5
pycparser==2.19
Pygments==2.3.1
pygsheets==2.0.1
PyInstaller==3.4
pylint==2.2.2
PyMySQL==0.9.3
pyodbc==4.0.26
PySocks==1.6.8
python-dateutil==2.7.5
pytz==2019.1
pywin32==224
pywin32-ctypes==0.2.0
pywinrm==0.3.0
PyYAML==5.1
requests==2.22.0
requests-kerberos==0.12.0
requests-ntlm==1.1.0
requests-oauthlib==1.2.0
rsa==3.4.2
s3transfer==0.2.1
selenium==3.141.0
six==1.11.0
soupsieve==1.8
stem==1.7.0
torrequest==0.1.0
tzlocal==1.5.1
uritemplate==3.0.0
urllib3==1.25.3
uuid==1.30
virtualenv==16.7.2
winkerberos==0.7.0
wrapt==1.10.11
xlrd==1.1.0
XlsxWriter==1.1.2
xmltodict==0.12.0
Appreciate any guidance.

Answer 1

Here's the problem:
Could not find a version that satisfies the requirement pywin32==224
Heroku doesn't run Windows, so pywin32 isn't available. I'm not sure what you're using that for. If you don't need it, remove it (along with pywin32-ctypes, pywinrm, and anything else that's Windows-dependent) then redeploy. If you're using those libraries you'll need to rewrite that portion of your code.
Generally speaking, your requirements.txt should only have things your application actually needs. I suspect that you've got a lot of things in there that you're not using. Maybe you're not using virtual environments?