Passing plot file name to plot command

[Yohan]

Dear All,

I am using the Gnuplot python module to display data from a file.

The commands work fine when I run them from the terminal, however I
start running into problems when I try running the same commands from
within python.

I have done plot before, but I had to manually write the file name
into the code. I want to create the function such that the user can
enter the file path and name and then pass this info as a variable
into the plot command.

The function is as follows:

def plot_data(file_name):
g = Gnuplot.Gnuplot()
g('set datafile separator "," ')
g('set commentschars "$"')
g('set style histogram clutser gap -1')

g.plot('file_name using 2:xtic(1), '' u 3 ti col, u 4 ti col') ###
This is the problem line here

When I run the function and pass the path of the file as the input to
the function, I get the error:

line 0: undefined variable: file_name

I can use a print command to see what the variable file_name contains
just before it calls the gnuplot function. It looks something like
this:

'/home/user/data/datafile.csv'

I hope someone out there can help me...

[Yohan]

#########

Turns out I fiddled around and figured it out:

plot(file_name + " <commands here > ")