python 24----- classroom finishing time and a random number of modules

First, the time module

1. timestamp calculation done

Get is the number of seconds, from at 0:00 on January 1, 1976 start to count now

import time
print(time.time())

2. Structure of time

It shows the current date, time

You can then obtain the desired value (example: Year extract) through to a variable

import time
print(time.localtime())
t = time.localtime()
print(t.tm_year)

3. The time stamp is converted to a structured

Parameters: seconds

import time
print(time.localtime(1272352345))

4. Universal Time, UTC (UK time zone)

import time
print(time.gmtime())

The converting structure of the time stamp

import time
print(time.mktime(time.localtime()))

6. The conversion time is structured string time strftime

% Y: Year% m: month% d: Day% X: minutes and seconds, the middle "-" customize

import time
print(time.strftime("%Y-%m-%d %X", time.localtime()))

　　

7. Converts a string structured time to time strptime

8. The time is the conversion structure of a fixed format string time

import time
print(time.asctime())  #参数默认为time.localtime()
print(time.asctime(time.localtime(1734124122)))

9. The time stamp is converted to a fixed format string time

Time Import 
Print (time.ctime ()) # default parameters time.time () 
Print (time.ctime (1,724,239,748))

10. The thread running postpone the specified time, in seconds

Time Import 
the time.sleep (2) 
Print ( "I did not print qaq after two seconds")

11 shows the current month and year time

import datetime
print(datetime.datetime.now())

Two, random module

1. give float (0 - 1) of the random number

import random
print(random.random())

2. Get an integer [1, 3] random number

import random
print(random.randint(1, 3))

3. Integer to give [1, 3) a random number

import random 
print (random.randrange (1, 3))

4. Parameters: iterables

Wherein obtain a random value

import random
print(random.choice([11, 22, 33]))

5. Incoming iterables and a value of n, n random values ​​obtained

import random
print(random.sample("werdwqrfdqw",3))

6. Get any range of floating-point numbers, exclusive of a number

import random
print(random.uniform(1, 3))

7. The list of upset (I tested only upset list)

import random
str1 = [11, 22, 33, 44, 55]
random.shuffle(str1)
print(str1)

8. The preparation of a 5-bit program codes, a random combination of alphanumeric

pass: ascill code

chr(65, 90) ----> A - Z

chr(97, 122) ------> a - z

Random Import 
DEF v_code (): 
    RET = "" 
    for I in Range (. 5): 
        NUM the random.randint = (0,. 9) 
        ALF = CHR (the random.randint (65, 90)) in # A - Z randomized to receive a 
        alf2 = chr (random.randint (97, 122)) # in a - to give a random Z 
        RES = STR (the random.choice ([ALF, formation of aluminum difluoride])) # in a - z to obtain a random 
        res2 = str (random. choice ([res, num]) ) # between letters and numbers to give a random 
        RET RET = + RES2 
    return RET 
Print (v_code ())