提问人：Milind 提问时间：11/17/2023 最后编辑：toyota SupraMilind 更新时间：11/17/2023 访问量：46
如何遍历字符串列表（即一个句子）并检查它是否包含以特定单词开头的单词？
How to iterate through a list of strings (i.e a sentence) and check if it has a word starts with a specific word in it?
问：
所以问题是创建一个 for 循环，它接受一个文档列表（每个文档都是一个字符串），它应该返回一个以特定关键字开头的字符串列表
示例（结果应为）：['python', 'python_one', 'python_two', 'python_three', 'python', 'python_two']
doc_list = ['welcome to python tutorial', 'you are welcome to python_one tutorial', 'python_two tutorial python_three tutorial', 'hello python', 'hello python_two world']
关键字 = python
import re
doc_list = ['welcome to python tutorial', 'you are welcome to python_one tutorial', 'welcome python_two tutorial python_three tutorial', 'hello python', 'hello python_four world']
output = []
for line in doc_list:
y = re.search(r' (python.*?) ', line)
if y: output.append(y.group(1))
print(output)
我得到的结果是
['python', 'python_one', 'python_two', 'python_four']
这里缺少python_three，因为我的代码忽略了每个句子字符串中 python 的多次出现。
答：
0赞
Codist
11/17/2023
#1
保持简单。遍历doc_list，将每个元素（句子）拆分为其组成单词，然后使用 startswith（） 检查每个单词。
doc_list = ['welcome to python tutorial', 'you are welcome to python_one tutorial', 'welcome python_two tutorial python_three tutorial', 'hello python', 'hello python_four world']
result = []
for sentence in doc_list:
for word in sentence.split():
if word.startswith("python"):
result.append(word)
print(result)
输出：
['python', 'python_one', 'python_two', 'python_three', 'python', 'python_four']
0赞
Andrej Kesely
11/17/2023
#2
另一种解决方案：
import re
doc_list = [
"welcome to python tutorial",
"you are welcome to python_one tutorial",
"welcome python_two tutorial python_three tutorial",
"hello python",
"hello python_two world",
]
out = []
for doc in doc_list:
out.extend(re.findall(r"\bpython\S*", doc))
print(out)
指纹：
[
"python",
"python_one",
"python_two",
"python_three",
"python",
"python_two"
]
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