在windows环境下安装python的XlsxWriter模块，虽然很简单，但由于自己粗心，少了一个字符，导致不少的错误。。。

1、通过pip命令来安装。

C:\Users\Administrator>pip install XlsWriter

Collecting XlsWriter

Could not find a version that satisfies the requirement XlsWriter (from versions: )

No matching distribution found for XlsWriter

You are using pip version 7.1.2, however version 8.1.1 is available.

You should consider upgrading via the 'python -m pip install --upgrade pip' command.

2、误以为是由于pip的版本太低，所以根据错误信息中的提示，更新pip

其中可以看到，会先下载，然后检测到有先前的版本，所以会先卸载，最后安装新版本的pip。

C:\Users\Administrator>python -m pip install --upgrade pip

Collecting pip

Downloading pip-8.1.1-py2.py3-none-any.whl (1.2MB)

100% |████████████████████████████████| 1.2MB 61kB/s

Installing collected packages: pip

Found existing installation: pip 7.1.2

Uninstalling pip-7.1.2:</