Creating a directory based on function parameters, Python

Question

Suppose I have a function:

def function(a,b,c):
    do some stuff
    array = some calcualated values
    np.savetxt('/home/user/'+str(a)+'<z<'+str(b)+'/mass/M_'+str(c)+'.dat',array)

As you can see I am saving a file called M_+str(c)+.dat in the path /home/user/'+str(a)+'<z<'+str(b)+'/mass/.

The problem I have is that, both str(a)+'<z<'+str(b) and mass folders don't exist.

I have to create them inside the function and save the file inside these folders. How do I achieve this task?

Have you even tried to make those directories? Where did you get stuck? — jonrsharpe
– jonrsharpe, Commented Jul 7, 2015 at 11:10
@jonrsharpe: to be frank, I don't know how to do it!! When I just run the function with a,b,c parameters, I get the obvious error No such file or directory. — Srivatsan
– Srivatsan, Commented Jul 7, 2015 at 11:12
And you aren't off Googling "python create directory" because...? — jonrsharpe
– jonrsharpe, Commented Jul 7, 2015 at 11:13
@jonrsharpe: I did, but I don't find any solutions for my specific case. I can use os.mkdir, but how do I do it when I need the directory names to be based on my function paramters? — Srivatsan
– Srivatsan, Commented Jul 7, 2015 at 11:14
Why don't you try that, and find out? The worst that can happen is that you get a different error message, and then you just try to solve that. — jonrsharpe
– jonrsharpe, Commented Jul 7, 2015 at 11:17

Pierre.Sassoulas · Accepted Answer · 2015-07-07 11:12:50Z

1

You can create the directory with :

os.mkdir

See the doc : https://docs.python.org/2/library/os.html

answered Jul 7, 2015 at 11:12

Pierre.Sassoulas

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