ERROR: Cannot find command ‘git‘ - do you have ‘git‘ installed and in your PATH
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虚拟环境中，在配置coco数据集的API时出现以下错误
(py37) C:\\Users\\HASEE>pip install git+https://github.com/philferriere/cocoapi.git#subdirectory=PythonAPI
Collecting git+https://github.com/philferriere/cocoapi.git#subdirectory=PythonAPI
Cloning https://github.com/philferriere/cocoapi.git to c:\\users\\hasee\\appdata\\local\\temp\\pip-req-build-60rcidcx
Running command git clone -q https://github.com/philferriere/cocoapi.git 'C:\\Users\\HASEE\\AppData\\Local\\Temp\\pip-req-build-60rcidcx'
ERROR: Error [WinError 2] 系统找不到指定的文件。 while executing command git clone -q https://github.com/philferriere/cocoapi.git 'C:\\Users\\HASEE\\AppData\\Local\\Temp\\pip-req-build-60rcidcx'
ERROR: Cannot find command 'git' - do you have 'git' installed and in your PATH
主要是因为你没有在虚拟环境中安装git这个包，解决方法很简单，只要在你的pycharm中添加git这个库就行了
然后再从终端或者cmd命令环境下输入：
pip install git+https://github.com/gautamchitnis/cocoapi.git@cocodataset-master#subdirectory=PythonAPI若仍然无法下载，那就是网络问题了，现在下载很多库，感觉都不方便，经常无法访问。
完成后，会有下面提示：
Cloning https://github.com/gautamchitnis/cocoapi.git (to revision cocodataset-master) to c:\\users\\hasee\\appdata\\local\\temp\\pip-req-build-1spsj_qj
Running command git clone -q https://github.com/gautamchitnis/cocoapi.git 'C:\\Users\\HASEE\\AppData\\Local\\Temp\\pip-req-build-1spsj_qj'
Running command git checkout -b cocodataset-master --track origin/cocodataset-master
Branch 'cocodataset-master' set up to track remote branch 'cocodataset-master' from 'origin'.
Switched to a new branch 'cocodataset-master'
Resolved https://github.com/gautamchitnis/cocoapi.git to commit 20291f19c46a8d11935862bc9e449a1b72ec25ed
Building wheels for collected packages: pycocotools
Building wheel for pycocotools (setup.py) ... done
Created wheel for pycocotools: filename=pycocotools-2.0-cp37-cp37m-win_amd64.whl size=80448 sha256=a90734666b5eddd3b89d211565a186d5a222dabe0d4cc9d4f6d81a63003a0963
Stored in directory: C:\\Users\\HASEE\\AppData\\Local\\Temp\\pip-ephem-wheel-cache-hbh2eneq\\wheels\\6e\\c9\\59\\56484d4d5ac1ab292a452b4c3870277256551505954fc4a1db
Successfully built pycocotools
Installing collected packages: pycocotools
Successfully installed pycocotools-2.0
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