'builtin_function_or_method' object has no attribute 'getitem' error in python

Question

I'm trying to interpret data I am planning to send betweeen machines with a chosen target where I will send the data to and the data the following code is supposed to do this(the target is a number of any length and has to start with a "/") I know the whole code isn't great and I am probably using wrong names for pretty much everything but I hope with a bit of help it will work

def Interpret(command):
    if(command[0] != "/"):
        return "ERROR"
    o = 1
    targetstr = []
    while(command[o] != " "):
        targetstr.append[command[o]]
        o = o + 1
    try:
        "".join(targetstr)
        target = int(targetstr)
    except:
        return "ERROR"
    data = []
    for i in range(o + 1, len(command)):
        data.append(command[i])
    return [target, "".join(data)]

everytime I run the code I get this error message: targetstr.append[command[o]] TypeError: 'builtin_function_or_method' object has no attribute 'getitem' (pbviously it is supposed to give me an array with the target and the data)

Voting to close as a typo since append is correctly called in one of the two occurrences. — chepner
– chepner, Commented Aug 3, 2019 at 15:35
"".join(targetstr) doesn't do anything useful; it leaves targetstr unchanged while ignoring the return value of join. Did you mean targetstr = "".join(targetstr)? (Also, targets = [] would be a better name to use for the list of targets; it's not a string yet.) — chepner
– chepner, Commented Aug 3, 2019 at 15:36

Iain Shelvington · Accepted Answer · 2019-08-03 15:34:19Z

4

list.append() is a function

targetstr.append[command[o]]

Should be

targetstr.append(command[o])

The reason why you are getting that particular error is that when you use the square bracket syntax foo[bar] python is actually calling foo.__getitem__(bar) and the append method does not have the attribute/method __getitem__

answered Aug 3, 2019 at 15:34

Iain Shelvington

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