if string contains global variable, how to use that global variable?

Question

I couldn't find an answer for this, so can you give a beginner pythonist some help. I have a string and if it is in globals, then I want to use that variable to manipulate it. I get an error that I'm using string to append, when my global variable is a list.

color = []
keyword = "color"
if keyword in globals():
    keyword.append("testing")

`globals()[keyword]` gives you the object. – Martijn Pieters Oct 28 '17 at 14:43 — Martijn Pieters, Oct 28 '17 at 14:43
You don't concat strings like that! Will give you an error. – Miraj50 Oct 28 '17 at 14:44 — Miraj50, Oct 28 '17 at 14:44

score 3 · Accepted Answer · answered Oct 28 '17 at 14:44

3

globals() returns a dictionary, which you can use like any other dictionary

globals()[keyword] = <my_new_value>

answered Oct 28 '17 at 14:44

blue_note

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Thank you :). And what if I wanted to append a value from the list? globals()[keyword].append("testing") @blue_note – mike-gallego Oct 28 '17 at 14:52
1

@user3152311: If you *know* that the `globals()[keyword]` is already a list, then `globals()[keyword].append("testing")` should work. – blue_note Oct 28 '17 at 14:58

if string contains global variable, how to use that global variable?

1 Answers1