python import re
时间: 2023-11-04 20:04:38 浏览: 109
As an AI language model, I can explain to you what is the purpose of `import re` statement in Python programming.
In Python programming, `import re` statement is used to import the regular expression module, which provides various functions and methods for working with regular expressions.
Regular expression is a sequence of characters that define a search pattern. It is used to match and manipulate text. Python's `re` module provides powerful tools for working with regular expressions. It allows you to search, replace, split, and extract information from text based on a pattern.
Once you import the `re` module, you can use its various functions and methods to work with regular expressions in your Python program.
Here's an example of using the `re` module to search for a pattern in a string:
```
import re
text = "The quick brown fox jumps over the lazy dog"
pattern = "fox"
match_obj = re.search(pattern, text)
if match_obj:
print("Match found:", match_obj.group())
else:
print("Match not found")
```
In this example, we imported the `re` module and used its `search()` function to search for the pattern "fox" in the string "The quick brown fox jumps over the lazy dog". If the pattern is found, the program prints "Match found" along with the matched text. If the pattern is not found, the program prints "Match not found".
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