Update Particles_software.py

Particles_software.py

@@ -29,6 +29,6 @@ class Particle:
         """Charge, 1,-1"""
         self.k = np.random.uniform(1, 0)
         if self.k > 0.5:
-            q = 1
+            self.q = 1
         else:
-            q = -1
+            self.q = -1