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On Windows, without git available on path, the following happens on import of GitPython:
[packagestack]fromgit.excimportGitErrorFile"C:\Miniconda3\lib\site-packages\git\__init__.py",line45,in<module>fromgit.repoimportRepo# @NoMove @IgnorePep8File"C:\Miniconda3\lib\site-packages\git\repo\__init__.py",line4,in<module>from .baseimport*File"C:\Miniconda3\lib\site-packages\git\repo\base.py",line31,in<module>fromgit.remoteimportRemote,add_progress,to_progress_instanceFile"C:\Miniconda3\lib\site-packages\git\remote.py",line190,in<module>classFetchInfo(object):File"C:\Miniconda3\lib\site-packages\git\remote.py",line219,inFetchInfov=Git().version_info[:2]File"C:\Miniconda3\lib\site-packages\git\cmd.py",line461,inversion_inforeturnself._version_infoFile"C:\Miniconda3\lib\site-packages\git\cmd.py",line424,in__getattr__returnLazyMixin.__getattr__(self,name)File"C:\Miniconda3\lib\site-packages\gitdb\util.py",line256,in__getattr__self._set_cache_(attr)File"C:\Miniconda3\lib\site-packages\git\cmd.py",line444,in_set_cache_version_numbers=self._call_process('version').split(' ')[2]File"C:\Miniconda3\lib\site-packages\git\cmd.py",line877,in_call_processreturnself.execute(call,**exec_kwargs)File"C:\Miniconda3\lib\site-packages\git\cmd.py",line602,inexecuteraiseGitCommandNotFound(command,err)git.exc.GitCommandNotFound:Cmd('git')notfounddueto:FileNotFoundError('[WinError 2] The system cannot find the file specified')cmdline:gitversion
Since it fails while trying to import the exception type that it raises (GitError), the only way to catch the error is with atry: ... except Exception: block, which is needlessly wide. It would be nice if a better pattern was available for conditional use of the package.