Python 3 - assignments within a loop

Question

So, I have a large number of arrays that I need a mean value for. To try and simplify I'm attempting to use a for-loop, but I'm not sure if this is possible or if it is, how I can name the left-hand of the assignment line. I've tried:

for data in data_list:
    data + _mean = np.mean(data)

This gives a syntax error; can't assign to operator. I feel like that's a lame try, but I'm very new to coding and I'm not sure what I can do on the left-hand side to make each assignment have a unique name.

Thanks for your time!

Append the values to a list.

Barmar
– Barmar

2017-09-28 07:33:55 +00:00
Commented Sep 28, 2017 at 7:33 — Barmar
– Barmar, Commented Sep 28, 2017 at 7:33

Barmar · Accepted Answer · 2017-09-28 07:35:56Z

2

Don't try to give each value a unique name, put them in a list. You can use a list comprehension for this.

means = [np.mean(data) for data in data_list]

answered Sep 28, 2017 at 7:35

Barmar

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2 Comments

grizzlyhills Over a year ago

I didn't know I could use 'for data in data_list' outside of a loop statement - thanks! that makes next step easier as well.

Barmar Over a year ago

Look up Python list comprehensions, they're very powerful and common in Python code.

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