why does islower have to be after .lower() in python
Question:
im new to coding in python
why islower() have to be after lower() i.e why is the below statement incorrect
phrase = "Hello world!"
print(phrase.islower().lower())
like am I not saying False first then change to lower????
Answers:
When you chain methods, each method is called on the result of the previous method, not the original value. So
print(phrase.islower().lower())
is roughly equivalent to
temp1 = phrase.islower()
temp2 = temp1.lower()
print(temp2)
lower() is being called on temp1, the boolean result of islower(), not the string phrase. Since booleans don’t have a lower() method, this gets an error.
im new to coding in python
why islower() have to be after lower() i.e why is the below statement incorrect
phrase = "Hello world!"
print(phrase.islower().lower())
like am I not saying False first then change to lower????
When you chain methods, each method is called on the result of the previous method, not the original value. So
print(phrase.islower().lower())
is roughly equivalent to
temp1 = phrase.islower()
temp2 = temp1.lower()
print(temp2)
lower() is being called on temp1, the boolean result of islower(), not the string phrase. Since booleans don’t have a lower() method, this gets an error.