Python Common Module 3 (OS and SYS modules)

Import OS
Import Sys

# Print (OS.GETCWD ()) #取当前工作目录
# Os.chmod ("/usr/local", 7) #给文件/directory plus permissions
# Print (Os.chdir (r "E:\byz_code\day2")) #更改当前目录
# print (Os.curdir) #当前目录
# print (Os.pardir) #父目录
# Print (Os.mkdir (r "test1)) #创建文件夹
# Print (Os.makedirs (r "Test1\test2")) #递归创建文件夹, parent directory does not exist when parent directory is created
# Print (Os.removedirs (r "Test1\test2")) #递归删除空目录
# Print (Os.rmdir ("Test1")) #删除指定的文件夹, only empty folders can be deleted
# Print (Os.remove (r "E:\byz_code\day4\a.txt")) #删除文件
# Print (Os.listdir ('. ')) #列出一个目录下的所有文件
# os.rename ("Test", "Test1") #重命名
# print (OS.SEP) #当前操作系统的路径分隔符
# print (R '%s '%os.linesep) #当前操作系统的换行符
# print (OS.PATHSEP) #当前系统的环境变量中每个路径的分隔符, Linux is:, Windows is;
# print (Os.environ) #当前操作系统的环境变量
# print (__file__) #代表当前文件
# Print (Os.path.abspath (' bb.py ')) #获取绝对路径
# Print (os.path.dirname)
# Print (Os.path.dirname (Os.path.dirname (__file__))) #获取父目录
# Print (os.path.exists ("hhaaa")) #目录/file is present
# Print (Os.path.isfile ("bb.py")) #判断是否是一个文件
# Print (Os.path.isdir ("/usr/local")) #是否是一个路径
# Print (Os.path.join ("root", ' hehe ', ' haha ', ' a.log ')) #拼接成一个路径
# os.path.join ("root", ' hehe ', ' haha ', ' a.log ')




# Print (Os.path.split ("/usr/hehe/hehe.txt")) #分割路径和文件名
# Print (Os.path.dirname ("/usr/local")) #获取父目录
# Print (Os.path.basename ("/usr/local")) #获取最后一级, if it is file display file name, if it is directory display directory name
# Print (os.path.exists ("/usr/local")) #目录/file is present
# Print (Os.path.isabs (".")) #判断是否是绝对路径
# Print (Os.path.isfile ("/usr/local")) #判断是否是一个文件
# Print (Os.path.isdir ("/usr/local")) #是否是一个路径
# Print (Os.path.join ("/root", ' hehe ', ' a.sql ')) #拼接成一个路径
# Print (Os.path.getatime ("len_os.py")) #输出最近访问时间
# Print (Os.path.getmtime ("len_os.py")) #输出最近访问时间


Import Sys
#sys. argv command line argument list, the first element is the path of the program itself
# sys.exit (' xxxxx ')
#退出程序, Exit normally (0)
# print (sys.version) #获取Python解释程序的版本信息
#sys. Path #返回模块的搜索路径, using the value of the PYTHONPATH environment variable when initializing
# print (sys.platform) #返回操作系统平台名称
def sayhi (name):
Print (' hi~%s '%name)

If __name__== ' __main__ ': #只有在运行自己这个python文件的时候
#才会执行下面的代码, it will not be executed when importing in another module.
Print (' This is the time in your own file: ', __name__)
Sayhi (' WMH ') # I'm calling when I'm self-rated

Python Common Module 3 (OS and SYS modules)