Python–提取字符串列表中以 K 开头的单词
原文:https://www . geesforgeks . org/python-extract-words-以-k 开头的字符串列表/
给定短语列表，提取所有以字符 k 开头的字符串
输入:test _ list =【“Gfg 好学习”“Gfg 好极客”“我爱 G4G”】，K = l 输出:【‘学习’，‘爱情’】 解释:提取所有以 L 为起始字母的元素。
输入:test _ list =【“Gfg 好学”“Gfg 是极客”“我爱 G4G”】，K = m 输出:【 解释:没有从“m”开始的单词，因此没有提取单词。
方法#1:使用循环+拆分()
这是解决这个问题的粗暴方法。在这种情况下，我们将每个短语转换成单词列表，然后检查每个单词的初始字符是否为 k。
Python 3
# Python3 code to demonstrate working of
# Extract words starting with K in String List
# Using loop + split()
# initializing list
test_list = ["Gfg is best", "Gfg is for geeks", "I love G4G"]
# printing original list
print("The original list is : " + str(test_list))
# initializing K
K = "g"
res = []
for sub in test_list:
# splitting phrases
temp = sub.split()
for ele in temp:
# checking for matching elements
if ele[0].lower() == K.lower():
res.append(ele)
# printing result
print("The filtered elements : " + str(res))
Output
The original list is : ['Gfg is best', 'Gfg is for geeks', 'I love G4G']
The filtered elements : ['Gfg', 'Gfg', 'geeks', 'G4G']
方法 2:使用列表理解+拆分()
这是执行这项任务的另一种方式。在本文中，我们在单个列表理解中运行双重嵌套循环，并执行必要的条件检查。
Python 3
# Python3 code to demonstrate working of
# Extract words starting with K in String List
# Using list comprehension + split()
# initializing list
test_list = ["Gfg is best", "Gfg is for geeks", "I love G4G"]
# printing original list
print("The original list is : " + str(test_list))
# initializing K
K = "g"
res = [ele for temp in test_list for ele in temp.split() if ele[0].lower() == K.lower()]
# printing result
print("The filtered elements : " + str(res))
Output
The original list is : ['Gfg is best', 'Gfg is for geeks', 'I love G4G']
The filtered elements : ['Gfg', 'Gfg', 'geeks', 'G4G']
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