python程序，输出前20个斐波那契数列，每行输出5个数

Sure, here's the code to output the first 20 Fibonacci numbers in Python:

a, b = 0, 1
for i in range(20):
    print(b, end=' ')
    a, b = b, a + b
    if (i+1) % 5 == 0:
        print()

This will output the first 20 Fibonacci numbers, with 5 numbers per line.