I have some problems about lists Python 2.7

Question

Could you tell me what's wrong here?

For some reason there's nothing added into the list.

textarea = raw_input()
n=0
txa = []
string =""

while(n < len(textarea)):
    if(textarea[n] != ' ' or textarea[n] != ','):

        string += textarea[n]
        n=n+1
        print (string)

    else:
        print "For some reason I'm never here."

        if(string == ' ' or string == ','):
            string = ""
        else:
            txa.append(string)
            string = ""
            n=n+1
print(txa)

Sorry for my english.

What are you trying to accomplish? That is important to understand to help you better. — user1767754, Dec 07 '17 at 06:30
Yeah, I'm sorry I'm trying to make a list from a string... Like: "Hello, goodbye" Then, txa would be like: ['Hello', 'goodbye'] I'm sorry for my poor explanation... — Sharki, Dec 07 '17 at 06:33
Well, I'm just a badass, I didn't know about that, thank you xD — Sharki, Dec 07 '17 at 07:17

score 0 · Answer 1 · answered Dec 07 '17 at 06:33

0

You need to change the or in your if statement to an and. Currently the condition is always true because it is impossible for textarea[n] to be both ' ' and ','.

You can also use regular expressions to split the string as seen here

answered Dec 07 '17 at 06:33

jonbush

56
4

score 0 · Answer 2 · answered Dec 07 '17 at 06:43

0

>>> txt = "Hello, goodbye Fred"
>>> txt.replace(',', ' ').split()
['Hello', 'goodbye', 'Fred']

answered Dec 07 '17 at 06:43

ShpielMeister

1,417
10
23

Hey, I was trying with your code, I'm sure it works perfectly, but I'm a bit idiot, so I couldn't get it to work. Anyway, I solved with: `"textarea.split(", ")"` Thank you! – Sharki Dec 07 '17 at 07:20

score 0 · Answer 3 · answered Dec 07 '17 at 06:59

First, you need to change or in your 1st if with and.

Second, if-else block in the 1st else is redundant. Try deleting it, but retaining the code in the 2nd else block.

Third, add an append just after the while so that the last word that is stored in the string variable also gets into the txa list.

Your code will pretty much, look like this -

while(n < len(textarea)):
    if(textarea[n] != ' ' and textarea[n] != ','):
        string += textarea[n]
        n=n+1
        print (string)

    else:
        print ("For some reason I'm never here.")
        txa.append(string)
        string = ""
        n=n+1

txa.append(string)
print(txa)

Tip: Moreover, you can try using in-built functions to do splitting for you.

txa = str(raw_input()).replace(',', ' ').split()

This one-liner works just fine.

That moment when I feel like a idiot... Python is incredible, thank you a lot! — Sharki, Dec 07 '17 at 07:17

I have some problems about lists Python 2.7

3 Answers3