用pip安装时都要在cmd命令行里启动的，而在python中无法运行。退出python运行环境就再执行pip可以了。
而且最好用管理员身份运行cmd
C:WINDOWSsystem32>cd D:PythonAPI
C:WINDOWSsystem32>D:
D:PythonAPI>pip install wordcloud-1.4.1-cp36-cp36m-win_amd64.whl
Processing d:pythonapiwordcloud-1.4.1-cp36-cp36m-win_amd64.whl
Requirement already satisfied: pillow in c:program filespython36libsite-packages (from wordcloud==1.4.1)
Requirement already satisfied: numpy>=1.6.1 in c:program filespython36libsite-packages (from wordcloud==1.4.1)
Collecting matplotlib (from wordcloud==1.4.1)
Using cached https://files.pythonhosted.org/packages/bf/b9/485032835e979ee11d514bb3b9b0543a928b8b96c099c178aeab1d2ba861/matplotlib-2.2.2-cp36-cp36m-win_amd64.whl
Collecting kiwisolver>=1.0.1 (from matplotlib->wordcloud==1.4.1)
Using cached https://files.pythonhosted.org/packages/44/72/16630c3392eba03788ad87949390516bbc488e8e118047a3b824631d21a6/kiwisolver-1.0.1-cp36-none-win_amd64.whl
Requirement already satisfied: six>=1.10 in c:program filespython36libsite-packages (from matplotlib->wordcloud==1.4.1)
Collecting cycler>=0.10 (from matplotlib->wordcloud==1.4.1)
Using cached https://files.pythonhosted.org/packages/f7/d2/e07d3ebb2bd7af696440ce7e754c59dd546ffe1bbe732c8ab68b9c834e61/cycler-0.10.0-py2.py3-none-any.whl
Requirement already satisfied: pytz in c:program filespython36libsite-packages (from matplotlib->wordcloud==1.4.1)
Collecting pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=2.0.1 (from matplotlib->wordcloud==1.4.1)
Using cached https://files.pythonhosted.org/packages/6a/8a/718fd7d3458f9fab8e67186b00abdd345b639976bc7fb3ae722e1b026a50/pyparsing-2.2.0-py2.py3-none-any.whl
Requirement already satisfied: python-dateutil>=2.1 in c:program filespython36libsite-packages (from matplotlib->wordcloud==1.4.1)
Requirement already satisfied: setuptools in c:program filespython36libsite-packages (from kiwisolver>=1.0.1->matplotlib->wordcloud==1.4.1)
Installing collected packages: kiwisolver, cycler, pyparsing, matplotlib, wordcloud
Successfully installed cycler-0.10.0 kiwisolver-1.0.1 matplotlib-2.2.2 pyparsing-2.2.0 wordcloud-1.4.1
You are using pip version 9.0.3, however version 10.0.1 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.