RegEx Exercise #0: Existentialism

Write three regular expressions: one called "nothing" that will match only an empty string, one called "anything" that will match any string empty or not, and one called "something" that will match non-empty strings only.

Example

txt1 = ""
txt2 = "This is not an empty string."

nothing = "yourregularexpressionhere"
anything = "yourregularexpressionhere"
something = "yourregularexpressionhere"

bool(re.match(nothing, txt1)) ➞ True
bool(re.match(nothing, txt2)) ➞ False
re.findall(nothing, txt1) ➞ [""]
re.findall(nothing, txt2) ➞ []

bool(re.match(anything, txt1)) ➞ True
bool(re.match(anything, txt2)) ➞ True
re.findall(anything, txt1) ➞ [""]
re.findall(anything, txt2) ➞ ["This is not an empty string."]

bool(re.match(something, txt1)) ➞ False
bool(re.match(something, txt2)) ➞ True
re.findall(something, txt1) ➞ []
re.findall(something, txt2) ➞ ["This is not an empty string."]

Notes

• You don't need to write a function, just the pattern.

• Do not remove import re from the code.

• You can find all the challenges of this series in my Basic RegEx collection.