esp32 windows environment issue of python requirements

pc系统：win7 x64

按照指导文档，无论是命令行安装还是msi安装，都一直卡在：

G:\esp\esp-idf-src\examples\wifi\getting_started\softAP>idf.py build
The following Python requirements are not satisfied:
pyserial>=3.0
future>=0.15.2
cryptography>=2.1.4
pyparsing>=2.0.3,<2.4.0
pyelftools>=0.22
gdbgui==0.13.2.0
pygdbmi<=0.9.0.2
reedsolo>=1.5.3,<=1.5.4
bitstring>=3.1.6
ecdsa>=0.16.0
esp-windows-curses; sys_platform == 'win32'
To install the missing packages, please run "G:\esp\esp-idf\install.bat"
Diagnostic information:
    IDF_PYTHON_ENV_PATH: D:\Programs\Python\Python38
    Python interpreter used: D:\Programs\Python\Python38\python.exe

ESP-IDF v4.2.1

解决：
python -m pip install --user -r \xxx\xxx\requirements.txt