made it so that the file contains the name testcase

tests/population/multiprocessing_via_population_comparison.py

@@ -3,6 +3,7 @@ import json
 import time
 import pickle
 import sys
+import numpy as np
 
 import matplotlib.pyplot as plt
 
@@ -112,7 +113,7 @@ test_pop.set(
 res = test_pop.evolve_population_comparison(
     parse_function, amt=int(amt_systems), nodes=int(amt_nodes)
 )
-with open("comparison_result.dat", "a") as f:
+with open("comparison_result_{}.dat".format(name_testcase), "a") as f:
     f.write(str(res) + "\n")