Trouble slicing based on function +1

Question

I am trying to search c_item_number_one = (r'12" Pipe SA-106 GR. B SCH 40 WALL smls'.upper()) for " to pull both it and all information in front of it. i.e. I want 12"

I thought I could just search for what position " is in...

def find_nps_via_comma_item_one():
    nps = '"'
    print(c_item_number_one.find(nps))
find_nps_via_comma_item_one()

Image showing above function results in 2 and then slice everything off after it

c_item_number_one = (r'12" Pipe SA-106 GR. B SCH 40 WALL smls'.upper())

def find_nps_via_comma_item_one():
    nps = '"'
    print(c_item_number_one.find(nps))
find_nps_via_comma_item_one()

item_one_nps = slice(3)
print(c_item_number_one[item_one_nps])

Issue: It is returning an error

print(c_item_number_one[item_one_nps])

TypeError: slice indices must be integers or None or have an __index__ method

How can I turn the results of my function into an integer? I've tried changing print(c_item_number_one.find(nps)) to return(c_item_number_one.find(nps)) but then it stopped giving a value entirely.

Lastly, the slice portion does not produce the full answer I am looking for 12". Even if I enter the value produced by the function 2

item_one_nps = slice(2)
print(c_item_number_one[item_one_nps])

It only gives me 12. I need to +1 the function results.

Answer 1

The print statement prints a value to the console whereas a return returns a value where the function is call.

In your code you are not storing the value but just printing it to the console even when you used return instead of print you weren't making use of the returned value.

1 is being added to the slice since while slicing python excludes the stop index so to include the stop index you add 1

c_item_number_one = (r'12" Pipe SA-106 GR. B SCH 40 WALL smls'.upper())

def find_nps_via_comma_item_one():
    nps = '"'
    return(c_item_number_one.find(nps))

item_one_nps = slice(find_nps_via_comma_item_one()+1)
print(c_item_number_one[item_one_nps])

The following code is more verbose.

c_item_number_one = (r'12" Pipe SA-106 GR. B SCH 40 WALL smls'.upper())

def find_nps_via_comma_item_one():
    nps = '"'
    return(c_item_number_one.find(nps))

index = find_nps_via_comma_item_one()

item_one_nps = slice(index+1)
print(c_item_number_one[item_one_nps])