Escaping practice

## Which definitions of ```s``` will cause ```re.findall(r"\don't", s)``` to return a non-empty list? - [ ] ```s = "don't"``` - [x] ```s = "1on't"``` - [ ] ```s = "do not"``` - [x] ```s = "0on't"```

## Which of the following match the regular expression ```\d.\d\d```? - [x] ```3.14``` - [ ] ```1.5``` - [x] ```2e23``` - [ ] ```10x5``` ## Which of the filenames is given by regular expression "task.\.py" - [x] ```task1.py``` - [x] ```task2.py``` - [ ] ```task3_py``` - [ ] ```task_3_py.zip```