def convertToBinary(self, n):
        result=""
        if n==0:
            return 0

        while n>0:
            r=n%2
            result+=str(r)
            n=int(n/2)
        if n%2==0:
            result+="0"
        return result[::-1]

>>> '{0:08b}'.format(6)
'00000110'

只是解释一下格式化字符串的部分:

{}将变量放入字符串中 0取参数位置为0的变量 :为这个变量添加格式化选项(否则它将表示十进制6) 08将数字格式化为左边加零的8位数字 B将数字转换为二进制表示形式

如果你使用的是Python 3.6或更高版本，你也可以使用f-strings:

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

简单的递归代码:

 def bin(n,number=('')):
   if n==0:
     return(number)
   else:
     number=str(n%2)+number
     n=n//2
     return bin(n,number)

    def convertToBinary(self, n):
        result=""
        if n==0:
            return 0

        while n>0:
            r=n%2
            result+=str(r)
            n=int(n/2)
        if n%2==0:
            result+="0"
        return result[::-1]