Python 17th days --- time module, random module, python 17th days

Python 17th days --- time module, random module, python 17th days

Complete a assignment and start new learning:

I learned the following two modules from today's limited time. I will continue tomorrow!

 

Time module and random Module

 

Import time

1 #! Usr/bin/env python 2 #-*-coding: UTF-8-*-3 # Author calmyan 4 import time, datetime 5 print (time. process_time () # measure the processing time, excluding sleep time 6 7 print (time. altzone) # returns the time difference from UTC time. 8 print (time. asctime () # return time format "Fri May 19 11:12:23 2017" 9 print (time. time () # timestamp 10 print (time. localtime () # returns the struct_time object Format 11 print (time. localtime (time. time () + 3600) # returns the struct_time object format of the local time in 12 13 print (time. gmtime () # returns the struct_time object format of the UTC time in 14 print (time. gmtime (time. time () + 3600) # returns the struct_time object format 15 print (time. time () # current timestamp 16 print (time. asctime (time. localtime () # return time format Fri May 19 18:16:42 201717 18 print (time. ctime () # return time format Fri May 19 18:16:42 201719 20 print (time. strptime ('2017-05-19 18:16:42 ',' % Y-% m-% d % H: % M: % s ')) # convert the time and date string to the time object 21 22 string_2 = time. strptime ('2017-05-19 18:16:42 ',' % Y-% m-% d % H: % M: % s ') # convert a time string to a time object 23 stu_2 = time. mktime (string_2) # mktime can convert a time object to a timestamp 24 print (stu_2) 25 26 string_3 = time. gmtime (stu_2) # convert to time object 27 print (string_3) 28 string_4 = time. strftime ('% Y-% m-% d % H: % M: % s', string_3) # convert to time string 29 print (string_4) 30 31 print (datetime. datetime. now () # current time, local 20:16:52. 16596832 print (datetime. date. fromtimestamp (time. time () # The timestamp is directly converted to the date format 2017-05-1933 34 print (datetime. datetime. now () + datetime. timedelta (3) # current time + 3 days 35 print (datetime. timedelta (5.3) #5 days 36 print (datetime. timedelta (-6.4) #-6 days time 37 print (datetime. datetime. now () + datetime. timedelta (hours = 3) # current time + 3 hours 38 print (datetime. datetime. now () + datetime. timedelta (minutes = 30) # current time + 30 minutes 39 print (datetime. datetime. now () + datetime. timedelta (seconds = 40) # current time + 30 minutes 40 41 a_time = datetime. datetime. now () 42 print (a_time.replace (minute = 3, hour = 2) # Replace time with 43 print (a_time) 44 print (a_time.replace (minute = 3, hour = 2, second = 18, day = 4) # Time replacement

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Import random

1 # random module 2 3 import random, string # character module 4 a = [1, 2, 3] 5. append (random. random () # random decimal number 6 a = random. random () # random decimal number 7 print (random. random () 8 print (random. randint () # randint random integer 9 print (random. randint (1, 8) 10 print (random. randrange (2, 3) # random integer without package ending number \ 11 12 print (random. sample (range (100), 4) # random number 13 14 str_list = string in the generator. digits + string. ascii_uppercase + string. ascii_lowercase # assign the ascii string to the variable 15 print (''. join (random. sample (str_list, 4) # concatenate 16 print (random. sample (str_list, 1) 17 # str_int = string. a18 # for I in range (0,255): 19 # print ('No.: % s % s' % (I, chr (I )))

View Code

A relatively low random code function is created:

1 def random_str (int = 4): # The default value is 4 bits, 2 str_int = string. digits # number 0-9 3 str_upp = string. ascii_uppercase # uppercase English 4 str_low = string. ascii_lowercase # lowercase letter 5 str_all = str_int + str_low + str_upp # common ascii characters 6 str_conut = [] 7 for I in range (int): 8 if I = 0: 9 str_conut.append (random. sample (str_upp, 1) [0]) # print (str_conut) 11 elif I = str_conut.append (random. sample (str_int, 1) [0]) # The second digit is the number 13 elif I = 2: 14 str_conut.append (chr (random. randint () # The third character is the special character 15 elif I = str_conut.append (random. sample (str_low, 1) [0]) # The fourth digit is the lowercase letter 17 else: 18 if len (str_conut) = int: 19 str_conut = ''. join (str_conut) 20 return str_conut21 else: 22 str_conut.append (random. sample (str_all, 1) [0]) # other digits are random characters 23 str_conut = ''. join (str_conut) 24 return str_conut