Check your understanding of the previous reading: 36 expressions to classify as True or False, according to the rules of Truthiness in Python. The source quiz drew 12 of these at random per attempt; here they are all, grouped into six sets of six.

Question 1

Would Python treat this expression as truthy in an if statement?

"0"

1 > 5 or 3

1 > 5 is False, so or evaluates its right side, 3, which is truthy.

" "

0.0

"Corgis are cute"

""

Question 2

Question 3

Would Python treat this expression as truthy in an if statement?

1

0

''

"False"

This is a five-letter string, not the boolean False; any non-empty string is truthy.

'"'

"True"

This is a string, not the boolean True; non-empty strings are always truthy.

Question 4

Question 5

Would Python treat this expression as truthy in an if statement?

"Hermione"[4:4]

"Harry"[1:-1]

This slices out "arr", a non-empty string.

"Harry"[0]

Indexing (not slicing) gives the one-character string "H".

"".upper()

"".upper

Without (), this is the method itself (a callable object), not its result; objects like this are truthy.

"HI".lower()

This evaluates to "hi", a non-empty string.

Question 6

Would Python treat this expression as truthy in an if statement?

1 or 0

1 is truthy, so or short-circuits and returns 1.

1 and 0

1 is truthy, so and evaluates and returns its right side, 0.

-5 and 5

-5 is truthy (non-zero), so and returns its right side, 5, which is also truthy.

-1 < 4 and 0

-1 < 4 is True, so and returns its right side, 0, which is falsy.

5 < 4 and 3

5 < 4 is False, so and short-circuits and returns False without even looking at 3.

"Hi" and "Low" and ""

Each truthy string passes the check to the next; the final "" is falsy, so that is what and returns.