python -m pip install --upgrade pip
2.安装XlxsWriter
python -m pip install XlsxWriter
pip各命令：
$ python -m pip --help
Usage:
c:\Users\xxl\AppData\Local\Programs\Python\Python36-32\python.exe -m pip [options]
Commands:
install Install packages.
download Download packages.
uninstall Uninstall packages.
freeze Output installed packages in requirements format.
list List installed packages.
show Show information about installed packages.
check Verify installed packages have compatible dependencies.
config Manage local and global configuration.
search Search PyPI for packages.
wheel Build wheels from your requirements.
hash Compute hashes of package archives.
completion A helper command used for command completion.
help Show help for commands.