[Python] 进制转换

python 中除了整型，其他进制的只能用字符串来表示

In [1]: ord('A')  # 字符 => ASCII码, Return the integer ordinal of a one-character string.
Out[1]: 65

In [2]: chr(65) # ASCII码 => 字符, Return a string of one character with ordinal i; 0 <= i < 256.
Out[2]: 'A'

In [3]: bin(99) # 十进制 => 二进制, Return the binary representation of an integer or long integer.
Out[3]: '0b1100011'

In [4]: int('0b1100011', 2) # 二进制 => 十进制, int('1100011', 2)
Out[4]: 99

In [5]: oct(99) # 十进制 => 八进制, Return the octal representation of an integer or long integer.
Out[5]: '0143'

In [6]: int('0143', 8) # 八进制 => 十进制
Out[6]: 99

In [7]: hex(99) # 十进制 => 十六进制, Return the hexadecimal representation of an integer or long integer.
Out[7]: '0x63'

In [8]: int('0x63', 16) # 十六进制 => 十进制
Out[8]: 99