Question

How would you convert a string into lowercase?

Answer 1

We use the lower() method for this.
AD

>>> 'AyuShi'.lower()
‘ayushi’

To convert it into uppercase, then, we use upper().

>>> 'AyuShi'.upper()
‘AYUSHI’

Also, to check if a string is in all uppercase or all lowercase, we use the methods isupper() and islower().

>>> 'AyuShi'.isupper()
False

>>> 'AYUSHI'.isupper()
True

>>> 'ayushi'.islower()
True

>>> '@yu$hi'.islower()
True

>>> '@YU$HI'.isupper()
True

So, characters like @ and $ will suffice for both cases

Also, istitle() will tell us if a string is in title case.

>>> 'The Corpse Bride'.istitle()
True