Easy way to get params from external file in the main script (and work with them)

a.param

# Parameters file for simulation.
{
    "dt" : 0.025,  # integration dt [ms]
    "dict_ampa_s1" : 
        {"t_stim" : 0.130, # t_stim [s]  
         "numbers" : 4, # number
         "delay" : 0.1, # delay [s]
         "type" : "ampa" # , type
         },
    "dict_ampa_s2" :
        {"t_stim" : 0.230, # t_stim [s]  
         "numbers" : 3, # number
         "delay" : 0.1, # delay [s]
         "type" : "ampa" # , type
         },
    'sec_to_rec' : ['all'],
    "var_to_plot" : ['v','cai','cali','ica'],
}

master_sim.py

import sys
from sumatra.external.NeuroTools import parameters
if __name__ == "__main__":
    
    if len(sys.argv) != 2:
        print("No parameter file supplied. Abort.")
        usage = 'python %s parameters_file.param' %__file__
        print usage
        sys.exit()
    
    parameter_file = sys.argv[1]
    parameter_dict = parameters.ParameterSet(parameter_file)
    parameter_dict # contains all the param. 
    parameter_dict['dt'] # value is 0.025 Python Float