python进制转换用if语句怎么写

在Python中，可以使用if语句来实现进制转换。以下是一个示例代码，演示了如何将一个十进制数转换为二进制、八进制和十六进制：

decimal_num = 10

binary_num = ""
octal_num = ""
hexadecimal_num = ""

# 转换为二进制
if decimal_num == 0:
    binary_num = "0"
else:
    while decimal_num > 0:
        binary_num = str(decimal_num % 2) + binary_num
        decimal_num = decimal_num // 2

# 转换为八进制
if decimal_num == 0:
    octal_num = "0"
else:
    while decimal_num > 0:
        octal_num = str(decimal_num % 8) + octal_num
        decimal_num = decimal_num // 8

# 转换为十六进制
if decimal_num == 0:
    hexadecimal_num = "0"
else:
    while decimal_num > 0:
        remainder = decimal_num % 16
        if remainder < 10:
            hexadecimal_num = str(remainder) + hexadecimal_num
        else:
            hexadecimal_num = chr(ord('A') + remainder - 10) + hexadecimal_num
        decimal_num = decimal_num // 16

print("二进制:", binary_num)
print("八进制:", octal_num)
print("十六进制:", hexadecimal_num)