轻松掌握Python正则表达式：高效处理文本数据的秘诀！

import re

pattern = r'apple'
text = 'apple pie'

match = re.match(pattern, text)
if match:
    print("Match found:", match.group())
else:
    print("No match")

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import re

pattern = r'apple'
text = 'I have an apple and a banana'

search = re.search(pattern, text)
if search:
    print("Match found:", search.group())
else:
    print("No match")

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import re

pattern = r'd+'
text = 'There are 3 apples and 5 bananas in the basket'

matches = re.findall(pattern, text)
print(matches)  # 输出: ['3', '5']

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import re

pattern = r'd+'
text = 'There are 3 apples and 5 bananas in the basket'

matches = re.finditer(pattern, text)
for match in matches:
    print("Match found:", match.group())

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import re

pattern = r'apple'
text = 'I have an apple and a banana'

replacement = 'orange'
new_text = re.sub(pattern, replacement, text)
print(new_text)  # 输出: "I have an orange and a banana"

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import re

pattern = r'(d{2})/(d{2})/(d{4})'
date_text = 'Today is 09/30/2023'

match = re.search(pattern, date_text)
if match:
    print("Full match:", match.group(0))
    print("Day:", match.group(1))
    print("Month:", match.group(2))
    print("Year:", match.group(3))

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import re

pattern = r'(d{2})/(d{2})/(d{4})'
date_text = 'Today is 09/30/2023'

match = re.search(pattern, date_text)
if match:
    day, month, year = match.groups()
    print(f"Date: {year}-{month}-{day}")

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import re

pattern = r'<.*?>'
text = '<p>Paragraph 1</p> <p>Paragraph 2</p>'

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

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import re

pattern = r'apple|banana'
text = 'I have an apple and a banana'

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

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import re

pattern = r'(w+) 1'
text = 'The cat cat jumped over the dog dog'

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

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