Making esds compatible with python 3.7

esds/simulator.py

@@ -110,7 +110,7 @@ class Simulator:
         """
         node=Node(src, self.netmat.keys())
         self.nodes.append(node)
-        thread=threading.Thread(target=node.run, daemon=True,args=[args])
+        thread=threading.Thread(target=node.run,args=[args]) # There must be "daemon=True" as a parameter, but we removed it to be compatible with older version of python
         thread.start()
 
     def log(self,msg,node=None):

setup.cfg

@@ -8,4 +8,4 @@ keywords = simulator, distributed systems, cyber-physical systems, network, wire
 license = GNU LGPLv3
 
 [options]
-install_requires = numpy >= 1.22.4
+install_requires = numpy

tests/run.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 
-import os, subprocess, time
+import os, subprocess, time,sys
 
 ##### Setup Variables
 tests_timeout=20 # Max duration of a test
@@ -15,7 +15,7 @@ for file in os.listdir(tests_path):
         print("- %-40s%s " % (file,"=>"),end='')
         try:
             start_at=time.time()
-            out=subprocess.check_output(simulator_path, stderr=subprocess.STDOUT,timeout=tests_timeout).decode("utf-8")
+            out=subprocess.check_output([sys.executable, simulator_path], stderr=subprocess.STDOUT,timeout=tests_timeout,encoding="utf-8")
             out_expected=open(out_path).read()
             end_at=time.time()
             if out_expected != out:
@@ -29,12 +29,12 @@ for file in os.listdir(tests_path):
         except subprocess.TimeoutExpired as err:
             print("failed :(")
             print("------------- Test timeout (should not exceed "+str(tests_timeout)+"s) -------------")
-            print(err.output.decode("utf-8"),end="")
+            print(err.output,end="")
             exit(1)
         except subprocess.CalledProcessError as err:
             print("failed :(")
             print("------------- Non test has a non-zero exit code -------------")
-            print(err.output.decode("utf-8"),end="")
+            print(err.output,end="")
             exit(2)
         except Exception as err:
             print("failed :(")