Getting AttributeError: 'str' object has no attribute 'append'

Question

I am getting the error:

AttributeError: 'str' object has no attribute 'append'

However, none of the posts on SO seem to be pertinent to my error. My issue is that I have no idea where my piece of code turns what seems to be an array into a string when appending.

Code:

import os
import hashlib
yn = True
var = []

while yn == True:
    print """
    1. Import from file
    2. Add new cards
    3. Look at the cards
    4. Delete cards  
    5. Modify cards  
    """
    ui = int(raw_input("Which option would you like to choose: "))
    if ui == 1:
        print "The directory is", os.getcwd()
        getcwdui = raw_input("Would you like to change the directory y/n: ")
        if getcwdui == "y":
            os.chdir(raw_input("Where would you like to change it to? Please make sure to include all necessary punctuation: "))
        else:
            print "\n"
        fileui = raw_input("Which file would you like to import?")
        file1 = open(fileui, "r")
        var = file1.read()
        var.split("]")
        file1.close()

#   [id, name, hp, set, setnum, rarity]
if ui == 2:
    name = raw_input("What is the name of the pokemon: ")
    hp = int(raw_input("What is the hp of the pokemon: "))
    setp = raw_input("What is the set of the pokemon: ")
    setnum = int(raw_input("What is the set number of the pokemon: "))
    rarity = raw_input("What is the rarity of the pokemon: ")
    copies = int(raw_input("How many copies of the card do you have: "))
    m = hashlib.md5()
    hashid = m.update(str(setnum))
    var.append([hashid, name, hp, setp, setnum, rarity])
    file1 = open(raw_input("What file would you like to open: "), "w")
    file1.write(str(var))
    file1.close()

user2555451 · Accepted Answer · 2014-12-19 02:58:43Z

2

Your problem is with this line:

var.split("]")

Like all string methods, str.split does not work in-place because strings are immutable in Python. Instead, it returns a new object, which is a list in this case.

If you want the value of var to change, you need to manually reassign the name:

var = var.split("]")

Otherwise, var will still be a string when you get to this line:

var.append([hashid, name, hp, setp, setnum, rarity])

Since strings do not have an append method, an AttributeError is raised.

answered Dec 19, 2014 at 2:58

user2555451

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Comments

LoicTheAztec · Accepted Answer · 2016-05-29 23:00:56Z

0

The first part of the above answer works. You can fix the second part with +=:

var += [hashid, name, hp, setp, setnum, rarity]

I hope this helps!

edited May 29, 2016 at 23:00

LoicTheAztec

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answered May 29, 2016 at 22:24

pianoman24

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1 Comment

Tadhg McDonald-Jensen Over a year ago

this would basically do the same thing as .extend which is not the same as .append...

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