Python - if statement not working correctly [duplicate]

Answer 1

It is because the condition is interpreted as :

if(yearlikedislike == "yes" or "Yes" == True or "YES" == True #...

try

if(yearlikedislike == "yes" or yearlikedislike == "Yes" or yearlikedislike == "YES"#...

or a more concise way :

if(yearlikedislike in ("yes", "Yes", "YES", #...

even more concise way :

if(yearlikedislike.lower() in ("yes", "yup", #...

A String (here "Yes") converted to a boolean is converted to True if it's not empty

>>> bool("")
False
>>> bool("0")
True
>>> bool("No")
True

Each part after or is independant from the previous.

Also consider using else or elif instead of two related if. And try to lower character before testing them so you need less test.

Answer 2

This is because Python is evaluating the "truthiness" of "Yes".

Your first if statement is interpreted like this:

if the variable "yearlikedislike" equals "yes" or the string literal "Yes" is True (or "truthy"), do something

You need to compare against yearlikedislike each time.

Try it like this:

if yearlikedislike in ("yes", "Yes", "YES", "yep", "yup", "Yep", "Yup"):
    #do something

Answer 3

if yearlikedislike in ("yes", "Yes", "YES", "yep", "yup", "Yep", "Yup"):

or

if yearlikedislike.lower() in ("yes","yep","yup"):

will do the trick

Answer 4

if (yearlikedislike == "yes" or "Yes" or "YES" or "yep" or "yup" or "Yep" or "Yup"):

Strings evaluate to True. I know you think you're saying that if yearlikedislike is equal to any of those things, keep going. However, what you're actually saying is:

if yearlikedislike equals "yes", or if "Yes" exists (which it does), or "YES" exists, etc:

What you want is either:

if (yearlikedislike == "yes" or yearlikedislike == "Yes" or yearlikedislike == "YES")

or better:

yearlikedislike in ("yes", "Yes", "YES", "yep", "yup", "Yep", "Yup")