python 2进制，8进制，10进制，16进制转换

       python里的进制转换并不复杂，大家只需要记住，目标进制为2进制时，就用bin(),目标进制是8进制的时候用oct(),目标进制是10进制的时候用int(),目标进制是16进制的时候用hex()

#coding=utf-8
'''
Created on 2016-3-28

@author: Administrator
'''
class NumberType():
    Binary = 1
    Eigth = 2
    Decimal = 3
    Hex = 4
    

def transfer_number(str_number,oldtype,newtype):
    number = ''
    if oldtype == NumberType.Binary:
        if newtype == NumberType.Eigth:
            number = oct(int(str_number, 2))
            
        if newtype == NumberType.Decimal:
            number = int(str_number,2)
            
        if newtype == NumberType.Hex:
            number = hex(int(str_number,2))
        
    if oldtype == NumberType.Decimal:
        
        if newtype == NumberType.Binary:
            number = bin(int(str_number))
        if newtype == NumberType.Eigth:
            number = oct(int(str_number))
        if newtype == NumberType.Hex:
            number = hex(int(str_number)) 
            
    if oldtype == NumberType.Eigth:
        if newtype == NumberType.Binary:
            number = bin(int(str_number, 8))
        if newtype == NumberType.Decimal:
            number = int(str_number, 8)
        if newtype == NumberType.Hex:
            number = hex(int(str_number, 8))
            
    if oldtype == NumberType.Hex:
        if newtype == NumberType.Binary:
            number = bin(int(str_number, 16))
        if newtype == NumberType.Eigth:
            number = oct(int(str_number, 16))
        if newtype == NumberType.Decimal:
            number = int(str_number, 16)
            
    return str(number)
    
if __name__ =='__main__':
    print transfer_number('2054', NumberType.Decimal, NumberType.Hex)