Python–将字符串列表转换为键值列表字典
原文:https://www . geesforgeks . org/python-convert-string-list-to-key-value-list-dictionary/
给定一个字符串,将其转换为键值列表字典,键作为第一个单词,其余单词作为值列表。
输入:test _ list =[“gfg 最适合极客”,“CS 最适合主语”] 输出:{‘gfg’:[‘is’,‘best’,‘for’,‘极客’,‘CS’:[‘is’,‘best’,‘subject’]} 解释:第 1 个元素与各自剩余的单词配对作为 list。
输入:test _ list =[“gfg 最适合极客”] 输出:{‘gfg’:[‘is’,‘best’,‘for’,‘极客’]} 解释:第 1 个元素与各自剩余的单词配对为 list。
方法#1:使用 split() +循环
在本文中,我们对每个字符串进行迭代,然后使用 split()执行字符串的拆分,将第一个元素指定为键,并将其他元素打包到列表中,使用*运算符并创建键值列表对。
Python 3
# Python3 code to demonstrate working of
# Convert String List to Key-Value List dictionary
# Using split() + loop
# initializing list
test_list = ["gfg is best for geeks", "I love gfg", "CS is best subject"]
# printing string
print("The original list : " + str(test_list))
res = dict()
for sub in test_list:
# split() for key
# packing value list
key, *val = sub.split()
res[key] = val
# printing results
print("The key values List dictionary : " + str(res))
Output
The original list : ['gfg is best for geeks', 'I love gfg', 'CS is best subject']
The key values List dictionary : {'gfg': ['is', 'best', 'for', 'geeks'], 'I': ['love', 'gfg'], 'CS': ['is', 'best', 'subject']}
方法二:使用 split() +词典理解
这是解决这个问题的类似方法。在这种情况下,词典理解被用来解决这个问题。
Python 3
# Python3 code to demonstrate working of
# Convert String List to Key-Value List dictionary
# Using split() + dictionary comprehension
# initializing list
test_list = ["gfg is best for geeks", "I love gfg", "CS is best subject"]
# printing string
print("The original list : " + str(test_list))
# using dictionary comprehension to solve this problem
res = {sub[0] : sub[1:] for sub in (ele.split() for ele in test_list)}
# printing results
print("The key values List dictionary : " + str(res))
Output
The original list : ['gfg is best for geeks', 'I love gfg', 'CS is best subject']
The key values List dictionary : {'gfg': ['is', 'best', 'for', 'geeks'], 'I': ['love', 'gfg'], 'CS': ['is', 'best', 'subject']}
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