尝试将zipcode转换为二进制时找不到错误

Question

这是我的代码，我觉得这应该是工作。我刚才添加了zipcode=str（zipcode）来查看它是否可以工作，所以我可能会去掉它，让原来的zipcode成为一个字符串。我需要它是一个字符串，因为我不想让二进制数实际相加。当我在python shell中初始化函数时，它什么也不返回

def digitConvert(zipcode):
zipcode = str(zipcode)
n = 0
binary = ""
while n < len(zipcode):
    if zipcode[n] == 0:
        binary = binary + "11000"
        n = n + 1
    elif zipcode[n] == 1:
        binary = binary + "00011"
        n = n + 1
    elif zipcode[n] == 2:
        binary = binary + "00101"
        n = n + 1
    elif zipcode[n] == 3:
        binary = binary + "00110"
        n = n + 1
    elif zipcode[n] == 4:
        binary = binary + "01001"
        n = n + 1
    elif zipcode[n] == 5:
        binary = binary + "01010"
        n = n + 1
    elif zipcode[n] == 6:
        binary = binary + "01100"
        n = n + 1
    elif zipcode[n] == 7:
        binary = binary + "10001"
        n = n + 1
    elif zipcode[n] == 8:
        binary = binary + "10010"
        n = n + 1
    elif zipcode[n] == 9:
        binary = binary + "10100"
        n = n + 1
return binary

谢谢你的帮助！你知道吗

Answer 1

如果我理解正确，邮政编码是一个整数。下面是一个将整数转换为二进制的小python函数。默认值是需要24位二进制。你知道吗

def int2bin(n, count=24):
    """returns the binary of integer n, using count number of digits"""
    return "".join([str((n >> y) & 1) for y in range(count-1, -1, -1)])

例如，我的邮政编码是60517，所以我会这样做：

>>> print int2bin(60517)  
000000001110110001100101 

如果我只需要16个二进制位：

>>> print int2bin(60517, 16)
1110110001100101

Answer 2

主要问题是zipcode[n]是一个字符，而不是一个数字，因此它永远不会与数字进行比较（Python不会自动转换它们）。您还可以进行一些简化，例如使用for循环而不是索引字符串，以及使用字典将十进制数字映射到二进制字符串。你知道吗

def digitConvert(zipcode):
    zipcode = str(zipcode)
    digitMap = { '0': '11000', '1': '00011', '2': '00101', ... }
    binary = ""
    for digit in zipcode:
        if digit in digitMap:
            binary += digitMap[digit]
    return binary

Answer 3

我看你的代码没有问题。。。除了缩进和检查if条件。你知道吗

def digitConvert(zipcode):
    zipcode = str(zipcode)
    n = 0
    binary = ""
    while n < len(zipcode):
        if zipcode[n] == '0':
            binary = binary + "11000"
        elif zipcode[n] == '1':
            binary = binary + "00011"
        elif zipcode[n] == '2':
            binary = binary + "00101"
        elif zipcode[n] == '3':
            binary = binary + "00110"
        elif zipcode[n] == '4':
            binary = binary + "01001"
        elif zipcode[n] == '5':
            binary = binary + "01010"
        elif zipcode[n] == '6':
            binary = binary + "01100"
        elif zipcode[n] == '7':
            binary = binary + "10001"
        elif zipcode[n] == '8':
            binary = binary + "10010"
        elif zipcode[n] == '9':
            binary = binary + "10100"
        n = n + 1
    return binary

更新：

您可以将整个过程简化为：

def digitConvert(zipcode):
  zipcode = str(zipcode)
  x = { 
    "0" : "11000",
    "1" : "00011",
    "2" : "00101",
    "3" : "00110",
    "4" : "01001",
    "5" : "01010",
    "6" : "01100",
    "7" : "10001",
    "8" : "10010",
    "9" : "10100"
  }
  return "".join(x[i] for i in zipcode if i in x)