Python declare multiple lists

Question

I have more than 300 variables in a list and i have to make a list of each variables:

example:

x=['aze','qsd','frz']...

i want:

MAXaze=[]
MAXqsd=[]
MAXfrz=[]
...

without typing them

Thank you for the help

Possible duplicate of [generating variable names on fly in python](http://stackoverflow.com/questions/4010840/generating-variable-names-on-fly-in-python) — Jean-François Fabre, Jan 12 '17 at 15:17
Bear in mind that variable names in Python [cannot start with numbers](https://docs.python.org/2/reference/lexical_analysis.html#grammar-token-identifier). — Phylogenesis, Jan 12 '17 at 15:19
better use dictionary - ie. `data["MAXaze"] = []` - it will be easy to do. — furas, Jan 12 '17 at 15:23

Nick is tired · Accepted Answer · 2017-01-12T15:20:56.297

1

You can use a dictionary to store the values:

x=['aze','qsd','frz',...]
vars = {}
for i in x:
    vars["MAX" + i] = []

Or in order for them to become real variables you can add them to globals:

x=['aze','qsd','frz',...]
for i in x:
    globals()["MAX" + i] = []

You can now use:

MAXaze = [1,2,3]

edited Jan 12 '17 at 15:20

answered Jan 12 '17 at 15:18

Nick is tired

1

except he says - **"i have to make a list of each variables:"** – Craicerjack Jan 12 '17 at 15:20
x=['aze','qsd','frz',...] for i in x: globals()[i] = 0 – mathieu Jan 12 '17 at 15:22
@NickA yes i will i have to wait 7 minutes to accept the answer – mathieu Jan 12 '17 at 15:24

score 0 · Answer 2 · answered Jan 12 '17 at 15:25

0

The easiest way that comes to my mind is by using exec. But be aware that there are security issues related to exec.

x=['aze','qsd','frz']
for i in x:
    exec('{}=[]'.format(i))

answered Jan 12 '17 at 15:25

alec_djinn

2 Answers2