无法在python中导入git

我正面临着这些问题.你能帮我一下吗？为什么我看到这个错误？我是否必须在requirements.txt文件中添加任何内容？

>>> import git
Traceback (most recent call last):
File "", line 1, in 
 import git
File "git\__init__.py", line 29, in 
_init_externals()
File "git\__init__.py", line 23, in _init_externals
raise ImportError("'gitdb' could not be found in your PYTHONPATH")
ImportError: 'gitdb' could not be found in your PYTHONPATH

>>> from git import Repo
Traceback (most recent call last):
File "", line 1, in 
from git import Repo
File "git\__init__.py", line 29, in 
_init_externals()
File "git\__init__.py", line 23, in _init_externals
raise ImportError("'gitdb' could not be found in your PYTHONPATH")
ImportError: 'gitdb' could not be found in your PYTHONPATH

Roman.. 5

我也得到了消息ImportError: 'gitdb' could not be found in your PYTHONPATH(当试图使用GitPython时).
但我已经安装了gitdb!
由于这个提示我发现gitdb默默失败,因为它缺少smmap.
所以我安装了它,它工作.

我也得到了消息ImportError: 'gitdb' could not be found in your PYTHONPATH(当试图使用GitPython时).
但我已经安装了gitdb!
由于这个提示我发现gitdb默默失败,因为它缺少smmap.
所以我安装了它,它工作.