How to convert a list into a dictionary in python-Python Tutorial-php.cn

How to convert a list into a dictionary in python

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Release： 2019-06-20 10:09:34

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Now there is a list, list1 = ['key1','key2','key3'], convert it into a dictionary like this: {'key1':'1','key2':'2',' key3':'3'}

Two methods for python to convert a list into a dictionary:

How to convert a list into a dictionary in python

1. Method: Construct a list again list2 = [' 1','2','3'], after using zip to convert to a tuple, then convert the tuple to a dictionary.

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list1 = [&#39;key1&#39;,&#39;key2&#39;,&#39;key3&#39;]
list2 = [&#39;1&#39;,&#39;2&#39;,&#39;3&#39;]
dict(zip(list1,list2))
{&#39;key1&#39;:&#39;1&#39;,&#39;key2&#39;:&#39;2&#39;,&#39;key3&#39;:&#39;3&#39;}

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2. There are two methods to convert nested lists into dictionaries,

new_list= [[&#39;key1&#39;,&#39;value1&#39;],[&#39;key2&#39;,&#39;value2&#39;],[&#39;key3&#39;,&#39;value3&#39;]]
dict(list)
{&#39;key3&#39;: &#39;value3&#39;, &#39;key2&#39;: &#39;value2&#39;, &#39;key1&#39;: &#39;value1&#39;}

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or this:

new_list= [[&#39;key1&#39;,&#39;value1&#39;],[&#39;key2&#39;,&#39;value2&#39;],[&#39;key3&#39;,&#39;value3&#39;]]
new_dict = {}
 for i in new_list:
new_dict[i[0]] = i[1]                #字典赋值，左边为key，右边为value
new_dict
{&#39;key3&#39;: &#39;value3&#39;, &#39;key2&#39;: &#39;value2&#39;, &#39;key1&#39;: &#39;value1&#39;}

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