class Solution(object):
    def addBinary(self, a, b):
        """
        :type a: str
        :type b: str
        :rtype: str
        """
        num1=num2=0
        z=0
        while(1):
            if len(a) == 0:
                break
            num1=num1+pow(2,z)*int(a[-1])
            a=a[:-1]
            z+=1
 

        z = 0
        while (1):
            if len(b) == 0:
                break
            num2 = num2 + pow(2, z) * int(b[-1])
            b = b[:-1]
            z += 1
        sum = num1+num2
        sum = str(bin(sum)[2:])
        return sum

這是最快的：

class Solution(object):
    def addBinary(self, a, b)
 
:
        """
        :type a: str
        :type b: str
        :rtype: str
        """
        num=int(a,2)+int(b,2)
        ans=bin(num)
        return ans[2:]

順便記錄一下python下各類轉換

# -*- coding: UTF-8 -*-

# 獲取使用者輸入十進位制數
dec = int(input("輸入數字："))

print("十進位制數為：", dec)
print("轉換為二進位制為：", bin(dec))
print
 
("轉換為八進位制為：", oct(dec))
print("轉換為十六進位制為：", hex(dec))