python random模塊使用

import random

# 0-1的浮點數 float
ret = random.random()
print(ret)
# 0.18216094743707534

# 0-5的整形,包括5
ret = random.randint(0, 5)
print(ret)
# 2

# 0-5的整形,不包括5
ret = random.randrange(0, 5)
print(ret)
# 3

# 從可迭代對象隨機獲取一個值
ret = random.choice([11, 22, 33])
print(ret)
# 22

# 從可迭代對象隨機獲取值,第二個參數是獲取值得個數
ret = random.sample([11, 22, 33, 11], 3)
print(ret)
# [22, 11, 33]

# 獲取指定范圍的浮點數 float
ret = random.uniform(1, 4)
print(ret)
# 1.106849277952516

# 打亂列表的順序
ret = [1, 2, 3, 4, 5, 6]
random.shuffle(ret)
print(ret)
# [2, 6, 5, 3, 1, 4]


# 使用實例
# 驗證碼函數
def v_code():
    ret = ''
    for i in range(4):
        # 獲取0-9的隨機數
        num = random.randint(0, 9)
        # 根據ASCII碼數字，獲取字母
        alf = chr(random.choice([random.randint(65, 90), random.randint(97, 122)]))
        # 字母和數字二選一拼接
        ret += str(random.choice([num, alf]))
    return ret


print(v_code())
# 5lg4