Python re.findall() Method
Python re Modulere.findall()is Pythonrein the module, used tofind all matchesfunction.
It scans the entire string and returns all substrings that match the regular expression, in the form of a list.
Word Definitions： find allIt means 'find all'.
Basic Syntax and Parameters
re.findall()It is a module-level function.
Syntax Format
re.findall(pattern, string, flags=0)
Parameter Description
- pattern: regular expression pattern
- string: the string to be searched
- flags: optional, regular expression flags
Function Description
- Return Value: Returns a list containing all matched strings. If there is no match, returns an empty list.
- Features: Returns all matches, not just the first one.
Examples
Example 1: Find All Numbers
Example
import re
text = I have 3 apples, 5 oranges, 8 bananas
# Find all numbers
result = re.findall(r'\d+', text)
print(Numbers found:, result)
text = I have 3 apples, 5 oranges, 8 bananas
# Find all numbers
result = re.findall(r'\d+', text)
print(Numbers found:, result)
Expected output:
找到的数字: ['3', '5', '8']
Example 2: Find All Words
Example
import re
text = "Python is powerful, Python is easy"
# Find all "Python"
result = re.findall(r'Python', text)
print(Python found:, result)
text = "Python is powerful, Python is easy"
# Find all "Python"
result = re.findall(r'Python', text)
print(Python found:, result)
Expected output:
找到的Python: ['Python', 'Python']
Example 3: Use Groups to Extract Multiple Contents
Example
import re
text = Email: [email protected], Email: [email protected]
# Use groups to extract username and domain at the same time
result = re.findall(r'(\w+)@(\w+\.\w+)', text)
print(Emails found:, result)
text = Email: [email protected], Email: [email protected]
# Use groups to extract username and domain at the same time
result = re.findall(r'(\w+)@(\w+\.\w+)', text)
print(Emails found:, result)
Expected output:
找到的邮箱: [('test', 'example.com'), ('admin', 'test.org')]
Example 4: Find All Phone Numbers
Example
import re
text = Zhang San: 138-1234-5678, Li Si: 139-9876-5432, Wang Wu: 137-5555-8888
# Find all phone numbers
result = re.findall(r'\d{3}-\d{4}-\d{4}', text)
print(All phone numbers:, result)
text = Zhang San: 138-1234-5678, Li Si: 139-9876-5432, Wang Wu: 137-5555-8888
# Find all phone numbers
result = re.findall(r'\d{3}-\d{4}-\d{4}', text)
print(All phone numbers:, result)
Expected output:
所有手机号: ['138-1234-5678', '139-9876-5432', '137-5555-8888']
Other Extensions