Using a string as a name for a numpy array

Question

I have a list including some names, as example: data_set_names=['matrix_1','matrix_2','matrix_3']. Inside a loop, I want to use each of these names for storing the output of some computations, which are as NumPy array. I highly appreciate if someone could tell me how to do that. As I looked it up online, exec() function can be used to convert a string to a variable name, but in my case, it is not useful.

Would storing the matrices as values in a dictionary where the keys are the strings in the list work for you? — ChrisOram
– ChrisOram, Commented Jul 30, 2021 at 10:34
Does this answer your question? How do I create variable variables? — Matthias
– Matthias, Commented Jul 30, 2021 at 11:17

Suspicio · Accepted Answer · 2021-07-30 10:37:42Z

1

You can use the dictionary of str/numpyArray

answered Jul 30, 2021 at 10:37

Suspicio

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PiElLi · Accepted Answer · 2021-07-30 10:41:03Z

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You could think about using globals() or locals() depending on your needs. Both are a dictionary of the variables you are using in your code, (global or locals) and from there you can assign a variable as a string, in your case something like:

for i in data_set_names:
    globals()[i] = 'your data here'

answered Jul 30, 2021 at 10:41

PiElLi

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2 Comments

Matthias Over a year ago

So why not use an explicit dictionary rather than doing this weird stuff?

Shahin Over a year ago

Thank you for your suggestion. Indeed, as I tried using a Dictionary is much easier.

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