random module os module

Random # 
# Import Random 
# random.random () # 0 and less than or greater than a decimal between 1 
# the random.randint () # 1 and less than or equal to an integer between. 3 
# random.randrange () greater than or equal to 1 and # less than the integer. 3 
# the random.choice ([. 1, '23 ',' [45] ']) take only a # 
# random.sample ([1, '23' , '[45]'], 2) take list # combination of any two 
# random.uniform (1,3) # 1 is greater than a decimal less than 3 
# Import Random 
# Print (random.random ()) 
# Print (the random.randint (l, 3)) 
# Print (random.randrange (l, 3)) 
# Print (The random.choice ([. 1, '23 ',' [45] '])) 
# Print (random.sample ([. 1, '23', '[45 ] '], 2)) 
# Print (random.uniform (l, 3)) 
' '' 
.09330761008045674 
. 1 
. 1 
[45] 
[ '[45]',. 1] 
. 1.9699491181751925
'''
# import random
L = # [1,2,3,4,5] 
# random.shuffle (L) shuffling # 
# Print (L) # [. 3, 2,. 4,. 5,. 1] 
# Import Random 
# DEF make_code (n-) : 
# = RES '' 
# for I in Range (n-): 
# STR = S1 (the random.randint (0,9)) 
# S2 = CHR (the random.randint (65, 90,)) 
# = RES + The random.choice ( [S1, S2]) 
# return RES 
# 
# Print (make_code (. 4)) YM1J # 

# OS module 
# Import OS 
# the os.getcwd () # Get the current working directory, i.e., the current working directory path python script 
# os.chdir ( "dirname") # script to change the current working directory, under the equivalent of cd shell 
# os.curdir # returns the current directory ( '.') 
# # os.pardir get the current directory's parent directory string name ( '..') 
# os.makedirs ( 'dirname1 / dirname2' ) # may generate recursive transfer multilayer 
# os.removedirs ( 'dirname1') # If the directory is empty, delete, and recursively to the parent directory, it should also empty, delete, and so on
# Os.mkdir ( 'dirname') # generate single-level directory, the equivalent of the shell dirname mkdir 
# os.rmdir ( 'dirname') # delete the single-level directory, if the directory is not empty can not be deleted, error, equivalent to the shell dirname rmdir 
# os.listdir ( 'dirname') # list all files and subdirectories in the specified directory, including hidden files, in a parallel fashion print 
# os.remove () # delete a file 
# os.rename ( "oldname", "newname") # rename file / directory 
# os.stat ( 'path / filename' ) # get the file / directory information 
# os.sep # output operating system-specific path separator is "\\" lower win, Linux of the "/" 
# # os.linesep output line terminator current platform used for "\ n \ t" under the win, as "\ n" under the Linux 
# # the os.name output string indicating the current use internet, win -> 'NT', Linux -> 'the POSIX' 
# os.system () # run shell commands, direct display 
# os.environ # acquisition system environment variables 
# os.path.abspath (path) # return path normalized absolute path 
# os.path.split (path) # the path into the directory and file name of the tuple returned 
# os.path.dirname (path) # Returns the directory path, in fact, the first element os.path.split (path) of
# Os.path.basename (patn) # Returns the last file name path, if path to / \ or end, it will return a null value, namely os.path.split (path) of the second element 
# os.path .exists (path) # If the path exists, returns Ture, if the path does not exist, return False 
# os.path.isabs (path) # If the path is the absolute path to return Ture 
# os.path.isfile (path) # If the path is an existing file, return Ture, otherwise it returns False 
# os.path.isdir (path) # If the path is an existing directory, returns Ture, otherwise it returns False 
# os.path.join (path1 [, path2 [,. ..]]) # combination of a plurality of paths after the return, a parameter before the first absolute path is ignored 
# os.path.getatime (path) # returns the path to the file or directory is last access time 
# os. path.getmtime (path) # return path points to a file or directory last modified 
# os.path.getsize (path) # return path size 
# Import os 
# Print (the os.stat (r'D: \ python13 of \ module ')) 
' ''
os.stat_result (The st_mode = 16895, st_ino = 8162774324621281, the st_dev = 79,899,118, st_nlink =. 1, the st_uid = 0, st_gid = 0, the st_size = 0, the st_atime = 1576237599, the st_mtime = 1576237599, 1576197311 st_ctime =) 
'' ' 
# Print ( os.stat (r'D: \ python13 of \ module ') .st_size) # 0 
# Print (os.stat (r'D: \ python13 of \ s1.log')) 
# Print (the os.stat (R & lt ' D: \ python13 of \ s1.log ') the st_size). 
# Print (os.path.getsize (r'D: \ python13 of \ s1.log')) 
'' ' 
os.stat_result (The st_mode = 33206, st_ino = 5066549580809765, the st_dev = 79,899,118, st_nlink =. 1, the st_uid = 0, st_gid = 0, the st_size = 237, the st_atime = 1,576,067,616, the st_mtime = 1,576,067,616, st_ctime = 1576067376) 
237 
237 
'' ' 
# Import OS 
# the os.system (' tasklist ' ) # see what is running too many processes on the system, as well as the beginning of garbled 
# res = os.System ( 'tasklist') 
# Print (RES) more than a rearmost # 0
# print(os.path.split(r'D:\python13期\s1.log'))
# print(os.path.dirname(r'D:\python13期\s1.log'))
# print(os.path.basename(r'D:\python13期\s1.log'))
'''
('D:\\python13期', 's1.log')
D:\python13期
s1.log
'''
# import os
# print(os.path.isabs(r'C:\\a123sx')) # python
# print(os.path.isabs(r'/rooy/a123sx')) # Linux
'''
True
True
'''
# import os
# print(os.path.join('C:','D:\\','dir1','a.txt')) # D:\dir1\a.txt
# import os
# print(os.path.normcase(r'D:/python13期\S1.log'))
''''' 'd: \ python13 of \ s1.log
Only useful on Windows systems uppercase to lowercase left and right slash slash changed Linux will return intact


# Print (os.path.normpath ( 'D: // windows \\ python13 of S1.log \\ ../ a.txt \\')) 
# Print (os.path.normcase ( 'D: // Windows \\ \\ python13 of s1.log ../ a.txt \\ ')) 
' '' 
D: \ Windows \ python13 of \ a.txt 
D: \\ Windows \ python13 of \ s1.log \ .. \ a.txt 
'' ' 
# Import OS 
# Print (os.path.dirname (os.path.abspath with (__ file__))) 
# Print (os.path.dirname (os.path.dirname (os.path.abspath with (__ file__ )))) 
'' ' 
D: \ python13 of \ module 
D: \ python13 of 
' '' 
# Import os 
# D: \ python13 of \ module \ os module Random module .py \ .. \ .. 
# Print (os .path.join ( 
# os.path.abspath with (__ file__), 
# '..', 
# '..' 
#)) 
# = base_dir os.path.normpath (the os.path.join(
#     os.path.abspath(__file__),
# '..', 
# '..' 
#)) 
# Print (base_dir) # Cross-platform 
'' ' 
D: \ python13 of \ modules \ random module os module .py \ .. \ .. 
D: \ python13 period 
'' '