1. 标准库sys主要是提供系统的相关信息。
举例:
# 引入模块 import sys print(sys.argv) print(type(sys.argv)) # ['F:/QUANT/练习/ninth.py'] # 获取命令行参数的列表 for i in sys.argv: print(i) print(type(i)) # name = sys.argv[1] # age = sys.argv[2] # hoby = sys.argv[3] # print(name,age,hoby) # 自动查找模块所需要的路径的列表 print(sys.path) # ['F:\QUANT\练习', # 'F:\QUANT\练习', # 'C:\Python37\python37.zip', # 'C:\Python37\DLLs', # 'C:\Python37\lib', # 'C:\Python37', # 'C:\Python37\lib\site-packages', # 'C:\Python37\lib\site-packages\win32', # 'C:\Python37\lib\site-packages\win32\lib', # 'C:\Python37\lib\site-packages\Pythonwin', # 'F:\QUANT\PyCharm 2017.3.2\helpers\pycharm_matplotlib_backend']