不間斷 Python 挑戰 Day 8 - random()模組 (2)

random.seed([a])

• 當a被省略時，每次調用random模組的方法生成的數就會是隨機的。
• 當a被設定後，每次使用random.seed(a)後調用random模組的方法生成的數就會是同一個。

rand_state = random.getstate()

random.setstate(rand_state)

# import random module
import random

# random seed
for i in range(5):
random.seed(1)
rand_int = random.randint(1, 10)
print(f"loop {i}: {rand_int}")

loop 0: 3
loop 1: 3
loop 2: 3
loop 3: 3
loop 4: 3

# save current state of the generator
rand_state = random.getstate()

# generate random integer
rand_int = random.randint(1, 10)
print(f"Generate a random integer: {rand_int}")

# generate another random integer
rand_int = random.randint(1, 10)
print(f"Generate another random integer: {rand_int}")

# generate random integer after restoring random state
random.setstate(rand_state)
rand_int = random.randint(1, 10)
print(f"Generate a random integer after restoring state: {rand_int}")

Generate a random integer: 10
Generate another random integer: 2
Generate a random integer after restoring state: 10

程式範例