为什么向Heroku推送Flask应用程序失败了？

Question

我只是尝试将我的Flask应用程序推送到Heroku，但遇到以下错误：

remote:            ERROR: Command errored out with exit status 1:
remote:             command: /app/.heroku/python/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-qq0uk569/xlwings/setup.py'"'"'; __file__='"'"'/tmp/pip-install-qq0uk569/xlwings/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-pip-egg-info-dxixzzkg
remote:                 cwd: /tmp/pip-install-qq0uk569/xlwings/
remote:            Complete output (5 lines):
remote:            Traceback (most recent call last):
remote:              File "<string>", line 1, in <module>
remote:              File "/tmp/pip-install-qq0uk569/xlwings/setup.py", line 32, in <module>
remote:                raise OSError("xlwings requires an installation of Excel and therefore only works on Windows and macOS. To enable the installation on Linux nevertheless, do: export INSTALL_ON_LINUX=1; pip install xlwings")
remote:            OSError: xlwings requires an installation of Excel and therefore only works on Windows and macOS. To enable the installation on Linux nevertheless, do: export INSTALL_ON_LINUX=1; pip install xlwings
remote:            ----------------------------------------
remote:        ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
remote:  !     Push rejected, failed to compile Python app.
remote: 
remote:  !     Push failed
remote: Verifying deploy...
remote: 
remote: !       Push rejected to browebgen.
remote: 
To https://git.heroku.com/browebgen.git
 ! [remote rejected] main -> main (pre-receive hook declined)
error: failed to push some refs to 'https://git.heroku.com/browebgen.git'

我不确定我需要做什么来摆脱这个错误

Answer 1

错误消息说明了这一切：

xlwings requires an installation of Excel and therefore only works on Windows and macOS. To enable the installation on Linux nevertheless, do: export INSTALL_ON_LINUX=1; pip install xlwings

您可能正在应用程序中使用名为xlwings的软件包，该软件包是为在Windows和Mac上使用而构建的，但Heroku上的服务器安装了linux，因此您首先必须将环境变量INSTALL_ON_LINUX设置为1，然后再次尝试部署该应用程序

通过Heroku CLI，您可以执行以下操作：

heroku config:set INSTALL_ON_LINUX=1