random模块

一 random模块运用
import random

# print(random.random())
# print(random.randint(1,3))
# print(random.randrange(1,3))
# print(random.choice([1,'egon',[1,2]]))
# print(random.sample([1, 'aa', [4, 5]], 2))

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

# item=['a','b','c','d']
# random.shuffle(item)
# print(item)


# import time
# def make_progress(precent,width=50):
#     if precent>1:precent=1
#     a=("[%%-%ds]"%width)%(int(precent*width)*"#")
#     print("\r%s %s%%"%(a,int(precent*100)),end="")
#
# total_size=66666
# size=0
# while size<total_size:
#     time.sleep(0.1)
#     size+=1024
#     precent=size/total_size
#     make_progress(precent)

import random
def made_code(size=7):
    res=""
    for i in range(size):
        s1=chr(random.randint(65,90))
        s2=str(random.randint(0,9))
        res+=random.choice([s1,s2])
    return res
print(made_code())

二 random汇总
random 0-1 开闭 
randint 0 - 3 开开 
randrange 0 - 3 开闭 
choice [1,2,32,3,2,"哈哈"]   
随机选一个 sample ([1,"a",["c","d"]],2)   
随机选指定个数 uniform (1,3)  闭闭 浮点 
shuffle (列表) 打乱顺序