Python 将值从for循环行映射到元组列表?

Python 将值从for循环行映射到元组列表?,python,mapping,Python,Mapping,对于下面的代码,我试图打印出元组列表中的值,这些元组基于列标题从行映射到行。然而,映射似乎出错了,没有给我想要的值 import itertools as it def buc(column_headers, tuples): row_dict = {} attribs = [1,2] measure = 10 # generate binary table based on number of columns binaries = [i for

对于下面的代码,我试图打印出元组列表中的值,这些元组基于列标题从行映射到行。然而,映射似乎出错了,没有给我想要的值

import itertools as it

def buc(column_headers, tuples):
    row_dict = {}   
    attribs = [1,2]
    measure = 10

    # generate binary table based on number of columns
    binaries = [i for i in it.product(range(2), repeat=(len(attribs)))]

    for line in binaries:
        line = list(line)

        # replace binary of 1 with 'ALL' or 0 with value from input attribs
        for index, item in enumerate(line):
            if (item == 1):
                line[index] = 'ALL'
            elif (item == 0):
                line[index] = attribs[index]

        line.append(measure)
        print(line)

        # map column values to column heading by index and store in row_dict (e.g. {'A': 1, 'B': 'ALL', 'M': 100} )
        for i in range(len(line)):
            row_dict[column_headers[i]] = line[i]
        tuples.append(row_dict)

    print(tuples)
以下是我得到的电流输出:

>>> buc(['A', 'B', 'M'], [])
[1, 2, 10]
[1, 'ALL', 10]
['ALL', 2, 10]
['ALL', 'ALL', 10]
[{'A': 'ALL', 'B': 'ALL', 'M': 10}, {'A': 'ALL', 'B': 'ALL', 'M': 10}, {'A': 'ALL', 'B': 'ALL', 'M': 10}, {'A': 'ALL', 'B': 'ALL', 'M': 10}]
我想要的正确输出应该是以下内容,其中根据列标题的索引将行正确映射到元组:

>>> buc(['A', 'B', 'M'], [])
[1, 2, 10]
[1, 'ALL', 10]
['ALL', 2, 10]
['ALL', 'ALL', 10]
[{'A': '1', 'B': '2', 'M': 10}, {'A': '1', 'B': 'ALL', 'M': 10}, {'A': 'ALL', 'B': '2', 'M': 10}, {'A': 'ALL', 'B': 'ALL', 'M': 10}]

我哪里做错了?

发生这种情况是因为您的列表
元组
只包含对原始词典的引用。看见你可以通过字典来解决这个问题

替换

tuples.append(row_dict)


这是因为列表
元组
仅包含对原始词典的引用。看见你可以通过字典来解决这个问题

替换

tuples.append(row_dict)