Python实现全自动安装第三方库的方法

pip install 第三方库名称

pip install 第三方库名称==版本号

pip install selenium==3.3

pip install 'selenium>3.3'

pip install C:\Project\pyRXP-2.2.0-cp35-cp35m-win_amd64.whl

pip install plotly -i https://pypi.tuna.tsinghua.edu.cn/simple

pip uninstall 第三方库名称

pip list

pip show 库名称

pip list -o

pip install --upgrade 库名称

"""如果引用的库未安装，则自动安装""" 
#为了明确异常信息，我们追加断言
try:
    import requests
    import pandas as pd
    from bs4 import BeautifulSoup
    import jieba
    import jieba.analyse
    import matplotlib.pyplot as plt
    from wordcloud import WordCloud,STOPWORDS
    import numpy as np
    from PIL import Image
# 使用pip.main()方法进行依赖库的安装（例举几个常用的库）   
except  ImportError:
    import pip
    pip.main(["install", "--user", "requests","beautifulsoup4","matplotlib","wordcloud","pandas","pillow"])
    import requests
    import pandas as pd
    from bs4 import BeautifulSoup
    import jieba
    import jieba.analyse
    import matplotlib.pyplot as plt
    from wordcloud import WordCloud,STOPWORDS
    import numpy as np    
    from PIL import Image 

import os
#需要安装的库
libs = ["requests","beautifulsoup4","matplotlib","wordcloud","pandas","pillow"]
#循环遍历安装
for lib in libs:
    os.system("pip install " + lib)