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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.

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