Call Python Script with command line arguments within .dat file

3DEC
1

Hi,

Is there anyway for us to call a python script within a dat file that includes a command line argument?

I have a python script that requires a command line argument and I want to iteratively call this script so I used the program call command but it does not recognize command line arguments so is there any alternative solution to that?

Thank you for your time.

2

Hi,
I’m not sure to understand what you need to do exactly. Call a python script from a classical data file ? Can you please clarify ?
Thanks,

Rima

3

Hello,
It is possible to call a python file using the program call command (ex : program call “py_script.py”) but you need to establish the connection between python and fish arguments. To do so you might use :
python_argument = itasca.fish.get(“fish_argument”).
Hope it helps you.

4

Hi @yopiprabowo !

I agree with @Rima and @Zakaria: further explications would be great.
An exemple file would be greater, even a very simplified one :wink: .

Regards.

Théophile

5

Dear @Rima , @Zakaria , and @Theophile ,

Thank you for your responses. I figured out a way to do this in python without having to resort to FISH variables.

Let’s say i have a main function in a script (solve.py) where model solve command is called:

def main():
    #Apply gravity load and solve to equilibrium
    num_inc = 10 #set total number of increments
    inc_size = 0.1 # 0.1 x 10 = 1.0 (the full application of loads)
    p_1 = 0.0
    p_2 = 0.0
    for count in range(0,num_inc,1):
        mult = inc_size
        p1,p2 = main_loop_v2.main(mult,count) #Call the function that needs two arguments, where loads were incrementally applied
        p_1 += p1
        p_2 += p2
        print("solving for p1 : {} N/m2 and p2 : {} N/m2".format(p_1,p_2))
        dmax,vmax = getmaxdisp()
        it.fish.set("maxdisp",dmax)
        it.command("model solve mech ratio-local 1e-4")
        it.command("model save")

Notice that I called main_loop_v2.py where the main function requires two arguments from
solve.py.

Thank you all for the help.

Regards,

YP

6

Hi @yopiprabowo !

First of all : sorry for the late response, I was away for a while.

So, I would indeed recommand driving directly from Python since you can easily run Fish commands from there and get access to 3DEC internal variables.

In my opinion, your script is a good solution.

By the way, the range(n) natively iterates from 0 to n with a step of 1, you do not need to provide range(0,n,1) :wink: .

>>> num_inc = 5
>>> for i in range(num_inc): print(i)
0
1
2
3
4
>>> for i in range(0, num_inc, 1): print(i)
0
1
2
3
4

Regards!

Théophile

7

Dear Théophile,

Thank you for your reply and your suggestion! Indeed typing range(n) instead of range(0,n,1) is a good practice! :smile: