How to understand random&os&sys module
This article is to share with you about how to understand the random&os&sys module, the editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article.
Random module
Import random
Print (random.random ()) # take a floating point value between 0 and 1
Print (random.randint (0prime9)) # Random integers from 0 to 9
Print (random.randrange (1 and 10)) # range 1-9 randomly take a number that contains 1 but not 9
Print (random.choice (1, 2) 3, 4)) # choice (string or list tuple) randomly removes an element or letter
Print (random.sample ('hello',2)) # randomly takes 2 digits
Print (random.uniform (1, 10)) # specifies a floating point number between 1 and 10
Lis= [1,2,3,4,5,6]
Random.shuffle (lis) # reshuffle the lis list
Print (lis)
# randomly generate CAPTCHA instances
Checkcode=''
For i in range (6):
Current=random.randrange (0Pol 6) # 0 1 2 take one at random
If current = = I:
Tmp = chr (random.randrange (65, 991)) # 65 to 90 take one at random
Else:
Tmp=random.randint (0Pol 9) # 0-9 randomly pick one
Checkcode+=str (tmp) # tmp overlay character overlay 6 times checkcode=str (tmp) + Last str (tmp) value
Print (checkcode)
Os module
Import os
Print (os.getcwd ()) # getting the current operation directory is similar to pwd
Os.chdir (r "D:\ project\ s14") # switch to the D:\ project directory
Print (os.getcwd ())
Print (os.curdir) # represents the current directory.
Print (os.pardir) # represents the directory at the next level..
Os.makedirs (r "D:\ a\ b\ c\ d") # Recursive create directory
Os.removedirs (r "D:\ a\ b\ c\ d") # Recursively delete something in the empty folder that is not deleted
Os.mkdir (r "D:\ b") # can only create one-level directories
Os.rmdir (r "D:\ b") # can only delete one level of directory
Print (os.listdir (r "D:\ project\ S14\ day5") # lists the directories or files in the current directory or in the specified directory
Print (os.listdir (".\ day5")) # day5 at the next level of the current directory
Print (os.listdir ()) # default current directory
Os.remove ("a.txt") # Delete a.txt files in the current directory or specified directory
Os.rename ("a", "b") # rename a file or folder, default to the current directory, path can be specified
Print (os.stat ('b.txt')) # View the b.txt file information in the current directory
Import time
Tm=time.localtime (1543050404) # tuple
Print (time.strftime ("% Y-%m-%d% H:%M:%S", tm)) # formatting time
Print (os.sep) # gets the path separator of the operating system under cmd is\\
Print (os.linesep) # get the newline character win is\ r\ n linux is\ n
The print (os.pathsep) # splitter file indicates that the delimiter win for each path is; linux is:
Print (os.environ) # get environment variables
Print (os.name) # get the current operating system name
Os.system ('dir') # is used to run cmd window commands
Os.system ('ipconfig')
Print (os.path.abspath (_ _ file__)) # gets the absolute path of the current file or directory, or you can specify other files or directories under the current directory
Print (os.path.abspath ("b"))
Print (os.path.split (r "D:\ project\ S14\ b.txt") # displays the tuple split directory and file name
Print (os.path.dirname (r "D:\ project\ S14\ b.txt")) # take the directory name of the file
Print (os.path.basename (r "..\ b.txt")) # take the file name
Print (os.path.exists (rusted:\ project')) # determines whether the directory exists, and if it exists, it is true.
Print (os.path.isabs (rattd:\ project\ s14\ b.txt') # determines whether it is an absolute path. If it is true, the path may not exist.
Print (os.path.isfile ("b.txt")) # determines whether the b.txt in the current directory is an ordinary file, and if it does not exist or the directory is false
# print (os.getcwd ())
# print (os.system ('dir')
Print (os.path.isdir ("b")) # determines whether it is a directory or not
# print (os.path.join (ringing Doreau recording, r'\ a recording, r'\ baking, r'\ d.txt')) # unknown
Print (os.path.getatime (rattd:\ project\ S14\ b.txt')) # get the access time of D:\ project\ S14\ b.txt file
Tm=os.path.getatime (ringing D:\ project\ s14\ b.txt') # timestamp
Print (time.strftime ('% Y-%m-%d% HGV% M% Shop time.localtime (tm)) # timestamps are converted to tuples and the output is formatted
Print (os.path.getmtime (r "D:\ project\ S14\ b.txt") # get the modification time of D:\ project\ S14\ b.txt file
Tmm=os.path.getmtime (r "D:\ project\ S14\ b.txt")
Print (time.strftime ('% Y-%m-%d -% HGV% MRV% Shop Magazine time.localtime (tmm)
Sys module
Import sys,os
Print (sys.version) # View python version
Print (sys.argv)
# change to the current directory in terminal and execute python os_1.py 1 2 3 4 5
# you can pass in 5 parameters
The above is how to understand the random&os&sys module, the editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.
