Briefcase requires git, but it is not installed (or is not on your PATH)

错误：已安装git并配置路径但执行briefcase new时报错如下：

Briefcase requires git, but it is not installed (or is not on your PATH)

表现：在python中输入import git会报错 ImportError: Bad git executable.

具体报错如下：

ImportError: Failed to initialize: Bad git executable.
The git executable must be specified in one of the following ways:
    - be included in your $PATH
    - be set via $GIT_PYTHON_GIT_EXECUTABLE
    - explicitly set via git.refresh()

All git commands will error until this is rectified.

This initial warning can be silenced or aggravated in the future by setting the
$GIT_PYTHON_REFRESH environment variable. Use one of the following values:
    - quiet|q|silence|s|none|n|0: for no warning or exception
    - warn|w|warning|1: for a printed warning
    - error|e|raise|r|2: for a raised exception

Example:
    export GIT_PYTHON_REFRESH=quiet

解决灵感来自ImportError: Bad git executable错误的解决方案_KI4EVER的博客-优快云博客

解决方案：不用配置path，配置GIT_PYTHON_GIT_EXECUTABLE即可。如图

 错误原因：未知