python常见进制转换方法示例代码

if __name__ == '__main__':
    # input接收到的是字符串, 使用int函数定义输入的是什么进制的字符串转换为10进制数字
    print(bin(int(input(), 16)))
    print(int(input(), 10))
    print(oct(int(input(), 10)))
    print(hex(int(input(), 10)))

if __name__ == '__main__':
    print("{:b}".format(int(input(), 8)))
    print("{:o}".format(int(input(), 8)))
    print("{:x}".format(int(input(), 8)))

class Solution:
    # 将十进制数字转换为任意的进制(1-16)
    def decimalToAny(self, decimal: int, x: int):
        remainder = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"]
        # 当n大于0的时候执行循环
        res = ""
        while decimal:
            res = remainder[decimal % x] + res
            decimal //= x
        return res
if __name__ == '__main__':
    decimal, x = map(int, input().split())
    print(Solution().decimalToAny(decimal, x))

class Solution:
    # 快速幂: x ** n
    def quickPower(self, x: int, n: int):
        res = 1
        while n > 0:
            if n % 2 == 1:
                res *= x
            x *= x
            n //= 2
        return res
    def anyToDecimal(self, s: str, base: int):
        n = len(s)
        res = 0
        for i in range(n):
            # 数字, ord函数获取字母的ascii值
            if "0" <= s[i] <= "9":
                res += (ord(s[i]) - ord("0")) * self.quickPower(base, n - i - 1)
            # 16进制数字对应的权重
            elif "a" <= s[i] <= "f":
                res += (ord(s[i]) - ord("a") + 10) * self.quickPower(base, n - i - 1)
            else:
                res += (ord(s[i]) - ord("A") + 10) * self.quickPower(base, n - i - 1)
        return res
if __name__ == '__main__':
    li = input().split()
    print(Solution().anyToDecimal(li[0], int(li[1])))

m = -1
bin(m & 0xffffffff)

# 1. 10 -> 16
hex(number)
# 2. 10 -> 2
bin(number)
# 3. 10 -> 8
oct(number)# 4. x进制 -> 10
int(UNIOn[str, bytes, bytearray],base=x)
------------------
print(int("0x16", base=16)) // 22

# 10进制
val = int('10')
print(type(val), val)
# 16进制
val = int('0xa', 16)
print(type(val), val)
val = int('a', 16)
print(type(val), val)
# 2进制
val = int('0b1010', 2)
print(type(val), val)
val = int('1010', 2)
print(type(val), val)
----------------------------无意义------------------------------
# 3进制
val = int('101', 3)
print(type(val), val)
# 5进制
val = int('60', 5)
print(type(val), val)