How to create variables from arguments in python

Question

I want to make a function in python were one of the arguments is a variable later...

as an example it should be like this

foo=myfunction("var1","var2",otherarguments)

(note that var1 and var2 are string never used before)

then the program should make

var1=blabla
var2=blabla2/otheraguments

i need this in order make graphs using GNUplot were a variable will be used to set the parameters of the graph

for example this should be inside the function

var1=Gnuplot.Gnuplot(debug=1)
var1("set terminal gif animate delay 10") #to make animation in gnuplot
var1("set style data lines")
var1.xlabel("name_of_x_axis")
var1("set pm3d")
var1.title("newgraph in 3d")
var1.splot(Gnuplot.GridData(otherarguments,X,Y,binary=0))

i tried with something like this

example={"var1":"Gnuplot.Gnuplot(debug=1)","var2":[1,2,3,4,5,6,7,8,9]}

and then

locals().update(example)

or

globals().update(example)

but i'm not sure how to implement this in a function

Use Python dictionaries to do this docs.python.org/tutorial/datastructures.html#dictionaries — milancurcic
– milancurcic, Commented May 16, 2012 at 17:43
im sorry what i want to do later is use the last line var1.splot(Gnuplot.GridData(otherarguments,X,Y,binary=0)) with other arguments in order to make the gif... this shoud be outside the funcion (the function it should be only for the set up frame of gnuplot and the first image in a gif — Santiago Wally Decat Sosa
– Santiago Wally Decat Sosa, Commented May 16, 2012 at 18:00

Ashwini Chaudhary · Accepted Answer · 2012-05-16 17:44:18Z

1

to create a variable from string use vars()

>>> foo="bar"
>>> vars()[foo] = 'qwertry'
>>> print bar  # --> 'qwertry'

answered May 16, 2012 at 17:44

Ashwini Chaudhary

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1 Comment

chepner Over a year ago

From the docs: "Note The contents of this dictionary should not be modified; changes may not affect the values of local and free variables used by the interpreter." (vars() being equivalent to locals()) docs.python.org/library/functions.html#locals

chepner · Accepted Answer · 2012-05-16 18:13:13Z

1

Edit: demonstrate return a reference to a plot for later use

def myfunction():
    var1=Gnuplot.Gnuplot(debug=1)
    var1("set terminal gif animate delay 10") #to make animation in gnuplot
    var1("set style data lines")
    var1.xlabel("name_of_x_axis")
    var1("set pm3d")
    var1.title("newgraph in 3d")
    return var1

myplot = myfunction()
# Now call myplot.splot with whatever arguments you want.
myplot.splot(Gnuplot.GridData(otherarguments, X, Y, binary=0))
myplot.splot(Gnuplot.GridData(morearguments, X, Y, binary=0))
myplot.splot(Gnuplot.GridData(stillmore, X, Y, binary=0))
for args in list_of_arguments:
    myplot.splot( Gnuplot.GridData(args, X, Y, binary=0) )

edited May 16, 2012 at 18:13

answered May 16, 2012 at 17:51

chepner

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2 Comments

Santiago Wally Decat Sosa Over a year ago

i want to create multiple plots from the same function... so i need to my function enter the name of the variable where later y will plot so this variables shoudent be only inside this function... this is in fact an animation so the last line will be repited in each frame of the gif and what changes is the otheraguments

chepner Over a year ago

Then you should have your function return a reference to the plot you create.

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