更简单的方法

my_num = 6
print(f'{my_num:b}')

. .或者如果你不确定它应该总是8位，你可以把它作为一个参数传递:

>>> '%0*d' % (8, int(bin(6)[2:]))
'00000110'

('0' * 7 + bin(6)[2:])[-8:]

or

right_side = bin(6)[2:]
'0' * ( 8 - len( right_side )) + right_side

def int_to_bin(num, fill):
    bin_result = ''

    def int_to_binary(number):
        nonlocal bin_result
        if number > 1:
            int_to_binary(number // 2)
        bin_result = bin_result + str(number % 2)

    int_to_binary(num)
    return bin_result.zfill(fill)

另一个想法:

>>> bin(6)[2:].zfill(8)
'00000110'

通过字符串插值的更短方法(Python 3.6+):

>>> f'{6:08b}'
'00000110'

只需使用format函数

format(6, "08b")

一般形式是

format(<the_integer>, "<0><width_of_string><format_specifier>")