二进制到十六进制转换答案

【问题标题】：Binary to Hexadecimal Conversions二进制到十六进制转换
【发布时间】：2016-02-09 06:27:19
【问题描述】：

#Conversion from Hex to Bin
def gethex(hexadecimal1):
       numbintotal=' '
       for i in range(len(hexadecimal1)):              
              numbin1=hexadecimal1[i]
              if(numbin1=='0'):
                  result='0000'
              elif(numbin1=='1'):
                  result='0001'
              elif(numbin1=='2'):
                   result='0010'
              elif(numbin1=='3'):
                   result='0011'
              elif(numbin1=='4'):
                   result='0100'
              elif(numbin1=='5'):
                  result='0101'
              elif(numbin1=='6'):
                   result='0110'
              elif(numbin1=='7'):
                   result='0111'
              elif(numbin1=='8'):
                   result='1000'
              elif(numbin1=='9'):
                   result='1001'
              elif(numbin1=='a'):
                   result='1010'
              elif(numbin1=='b'):
                   result='1011'
              elif(numbin1=='c'):
                   result='1100'
              elif(numbin1=='d'):
                   result='1101'
              elif(numbin1=='e'):
                   result='1110'
              elif(numbin1=='f'):
                   result='1111'
              elif(numbin1=='q'):
#Get hexadecimal
while(numhex!='q'):
    numhex=raw_input('Enter a hexadecimal number (q to quit): ')
    numbin= gethex(numhex)
    if(numhex=='q'):
        print(numbin)
    else:
        print('The binary number is:'+ numbin)


                   result='Program shutting down...'
              else:
                   result='Please type in a hexadecimal number'
              numbintotal= numbintotal + result
       return numbintotal


#Create a varaible
numhex='0'
results='0'
numbin1='0'

如上所示，我知道如何从十六进制转换为二进制，但我不确定如何将二进制转换为十六进制？请注意，您不能使用任何 Python 函数，因为这只是一个简单的方法，所以我只是让您知道！我正在考虑与代码中的完全相反的操作，例如 numbin1== 0001 和 result= 1。请帮助我，将不胜感激！这是在 Python 2.7 中！

【问题讨论】：

标签： python-2.7 binary hex

【解决方案1】：

试试这个功能。

def binhexZ(invalue):
    wmap = {"0000": "0",
            "0001": "1",
            "0010": "2",
            "0011": "3",
            "0100": "4",
            "0101": "5",
            "0110": "6",
            "0111": "7",
            "1000": "8",
            "1001": "9",
            "1010": "A",
            "1011": "B",
            "1100": "C",
            "1101": "D",
            "1110": "E",
            "1111": "F"
            }
    i = 0
    output = ""

    while (len(invalue) % 4 != 0):
        invalue = "0" + invalue

    while (i < len(invalue)):
        output = output + wmap[invalue[i:i + 4]]
        i = i + 4

    output = output.lstrip("0")
    output = "0" if len(output) == 0 else output

    return output

【讨论】：