用于匹配点和括号的python正则表达式

import re

# 示例字符串
text = "This is a test. Do you see the dot?"

# 匹配点
pattern = r"\."

matches = re.findall(pattern, text)
print(matches)  # 输出: ['.', '.']

import re

# 示例字符串
text = "This is a test (with a parenthesis)."

# 匹配左括号
pattern = r"\("

matches = re.findall(pattern, text)
print(matches)  # 输出: ['(']

import re

# 示例字符串
text = "This is a test (with a parenthesis)."

# 匹配右括号
pattern = r"\)"

matches = re.findall(pattern, text)
print(matches)  # 输出: [')']

import re

# 示例字符串
text = "This is a test (with a parenthesis). And another sentence."

# 匹配点和括号
pattern = r"[().]"

matches = re.findall(pattern, text)
print(matches)  # 输出: ['(', ')', '.']

import re

# 示例字符串
text = "This is a test (with a parenthesis). And another sentence."

# 匹配包含点和括号的子字符串
pattern = r"\(.*?\)|\."

matches = re.findall(pattern, text)
print(matches)  # 输出: ['(with a parenthesis)', '.']