KnowCardPython · Regular Expressions
What does \b mean in a regex, and what's the bug in re.search("\bword", text)?
Answer locked. Get the free KnowCard app to reveal it — plus spaced-repetition review so it actually sticks.
More in Regular Expressions
Greedy .* vs lazy .*? — what's the difference and when does it bite you?
Why should regex patterns almost always be written as raw strings r"..." instead of plain strings?
What does this print?
```
import re
print(re.match(r"Python", "I love Python"))
```
re.match vs re.search vs re.fullmatch — what does each require of where the pattern sits in the string?
What does this print?
```
import re
print(re.findall(r"P[Yy]thon",
"Python or PYthon"))
```
What does this print?
```
import re
print(re.findall(r"P([Yy])thon",
"Python and PYthon"))
```
Start learning today
Free to start — download the app or use it in your browser.