在Python中,re
模塊提供了對(duì)正則表達(dá)式的支持。你可以使用re.search()
、re.findall()
等函數(shù)來查找字符串中與正則表達(dá)式匹配的部分。
下面是一些示例:
re.search()
查找字符串中與正則表達(dá)式匹配的第一個(gè)子串:import re
text = "Hello, my phone number is 123-456-7890."
pattern = r'\d{3}-\d{3}-\d{4}'
match = re.search(pattern, text)
if match:
print("Found a match:", match.group())
else:
print("No match found.")
re.findall()
查找字符串中與正則表達(dá)式匹配的所有子串:import re
text = "Hello, my phone numbers are 123-456-7890 and 987-654-3210."
pattern = r'\d{3}-\d{3}-\d{4}'
matches = re.findall(pattern, text)
if matches:
print("Found matches:", matches)
else:
print("No matches found.")
re.sub()
替換字符串中與正則表達(dá)式匹配的子串:import re
text = "Hello, my phone number is 123-456-7890."
pattern = r'\d{3}-\d{3}-\d{4}'
replacement = "XXX-XXX-XXXX"
new_text = re.sub(pattern, replacement, text)
print("New text:", new_text)
這些示例展示了如何在Python中使用正則表達(dá)式進(jìn)行查找和替換操作。你可以根據(jù)需要調(diào)整正則表達(dá)式以匹配不同的文本模式。