![Python. re
● d D
● s S
● w W
● b
● []
○ [amk]
○ [0-5][0-9]
● '.'
● '^', '$'
● '*'
● '+'
● '?'
● {m}
● {m,n}
● (...)
● (?:...)](https://image.slidesharecdn.com/pythonre-160725201613/85/Python-re-3-320.jpg)
![Python. match
● match(pattern, string, flags=0)
● m=re.match(‘[a-z0-9_.-]+@[a-z0-9.-]+.w{2,4}’,text)
○ m - match object
○ m - None
○ m.group(n)](https://image.slidesharecdn.com/pythonre-160725201613/85/Python-re-5-320.jpg)
Python. re
- 2. Python. re ● import re ● Regular expression
- 3. Python. re ● d D ● s S ● w W ● b ● [] ○ [amk] ○ [0-5][0-9] ● '.' ● '^', '$' ● '*' ● '+' ● '?' ● {m} ● {m,n} ● (...) ● (?:...)
- 4. Python. compile ● compile(pattern, flags=0) ○ re.I¶ ○ re.M¶ ○ re.U ● r = re.compile(‘b(ddsd)’) m = r.match(text)
- 5. Python. match ● match(pattern, string, flags=0) ● m=re.match(‘[a-z0-9_.-]+@[a-z0-9.-]+.w{2,4}’,text) ○ m - match object ○ m - None ○ m.group(n)
- 6. Python. findall ● findall(pattern, string, flags=0) ○ Return a list of all non-overlapping matches in the string ○ Empty matches are included in the result
- 7. Python. findall ● text = ‘’’hello, my friend! 1234 Hello, world 1616 ... It's time to understand 2323. Hiiiii! 4567 ooogh ... Good morning!!! 4345 heheheheh 5665 jfgjfjgjf 4545 ... That's all!!!! 7878 7678 0990 9900 7878''' ● results = re.findall('(d{2})1',text)
- 8. Python. search ● search(pattern, string, flags=0) ○ match object ○ None if no match was found ● m = re.search('(d{2})1',text)
- 9. Python. finditer ● finditer(pattern, string, flags=0) ○ iterator over all non-overlapping matches ● iter = re.search('(d{2})1',text) for m in iter: ... print m.group(0)