Question

我有一个包含键和值对的字典。每个键可以有多个值，例如字典可以是这样的：

    enh_166084:['AC002454.1', 'RN7SL7P']
    enh_341666:['MYOM1', 'RP13-270P17.2', 'SNORA70']

现在，我想迭代键并将其相应的值写入txt文件，每个值在一行上，如下所示：

    AC002454.1
    RN7SL7P
    MYOM1
    RP13-270P17.2
    ......

我该怎么做？

Answer 1

使用字典itervalues()方法：

for value in your_dict.itervalues():
    # Since the values are lists, we have to enumerate those too:
    for item in value:
        output_file.write(item)
        output_file.write("\n")

Answer 2

迭代每个键，然后遍历每个值：

for key in dictionary: # For each key
    for value in dictionary[key]: # For each value in the dictionary under that key
        # Do something with the value

Answer 3

也许您可以将值提取为嵌套列表，展平它，然后循环它：

import itertools
chain = itertools.chain(*mydict.values())
for i in list(chain):
    output_file.write(item)
    output_file.write("\n")

如何迭代字典的值？

3 个答案: