Using a list of strings in an if statement [closed]

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I have several lists that are structured as follows

list_01= [['Little Line', '15']]
list_02= [['Long Line', '20']]

Later on in the code after these lists I want to create a function that defines the creation of lines that I want to work as follows. If the items in the list equal the strings 'Little Line' and '15', it will create a little line.

def draw_line(dataset):
    if dataset[0[0]]==('Little Line'):
        left(dataset[0[1]])
        foward(25)

Later, I can then call this function as follows later on in the code:

draw_line(list_01)

to create the line. The code I've described is pretty similar to my current code and shows how I believe it should work. I understand this should probably be pretty basic code, but I'm experiencing errors and can't quite figure out how it should work.

dataset[0[0]] is not going to work, you can't index integers (0[0]). Did you mean dataset[0][0] perhaps? Why the nested format? — Martijn Pieters
– Martijn Pieters, Commented Apr 17, 2017 at 11:33
It seems your way of accessing the dataset is wrong. dataset[0[1]] should've been dataset[0][1]. [0[1]] is not a real index as it should have just been a number. — kreddyio
– kreddyio, Commented Apr 17, 2017 at 11:36

Tim Pietzcker · Accepted Answer · 2017-04-17 11:33:03Z

3

Your syntax for accessing nested lists is wrong. Instead of

dataset[0[0]]

you need to do

dataset[0][0]

But in general, a list is not a reasonable datatype for this. A dictionary would make a lot more sense:

moves = {
    "Little line": 15,
    "Long line": 20,
    # etc.
    }

and then do something like

def draw_line(dataset):
    left(dataset[0])
    forward(25)

answered Apr 17, 2017 at 11:33

Tim Pietzcker

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