正则表达式查找不是以句子开头的以大写字母开头的单词

Question

我设法找到了以大写字母开头的单词，但无法找出正则表达式来过滤出从句子开头开始的单词。

每个句子以句号和空格结尾。

• Test_string = This is a Test sentence. The sentence is Supposed to Ignore the Words at the beginning of the Sentence.

• 所需的输出= ['Test', 'Supposed', 'Ignore', 'Words', 'Sentence']

我正在用Python编码。 如果有人可以帮我解决正则表达式，将感到高兴：）

Answer 1

您可以使用以下表达式：

(?<!^)(?<!\. )[A-Z][a-z]+

正则表达式演示here。

---

import re
mystr="This is a Test sentence. The sentence is Supposed to Ignore the Words at the beginning of the Sentence."

print(re.findall(r'(?<!^)(?<!\. )[A-Z][a-z]+',mystr))

打印：

['Test', 'Supposed', 'Ignore', 'Words', 'Sentence']

Answer 2

一个非常基本的选项。有关说明，请参见here。

[^.]\s([A-Z]\w+)

---

import re
s = 'This is a Test sentence. The sentence is Supposed to Ignore the Words at the beginning of the Sentence, And others.'
re.findall(r'[^.]\s([A-Z]\w+)', s)

输出

['Test', 'Supposed', 'Ignore', 'Words', 'Sentence', 'And']