standar model

Author: qiwsir

newcodes/answers/q75.py

@@ -0,0 +1,38 @@
+#!/usr/bin/env python
+# -*- coding: UTF-8 -*-
+
+class Particle:
+    def __init__(self, name="", position=(0.0, 0.0, 0.0), velocity=(0.0, 0.0, 0.0), spin=0.0):
+        self.position = position
+        self.velocity = velocity
+        self.name = name
+        self.spin = spin
+    def __str__(self):
+        pos = "({0:.2f}:{1:.2f}:{2:.2f})".format(self.position[0], self.position[1], self.position[2])
+        vel = "({0:.2f}:{1:.2f}:{2:.2f})".format(self.velocity[0], self.velocity[1], self.velocity[2])
+        the_str = "{0}\n at {1}\n with velocity {2}\n and spin {3}\n".format(self.name, pos, vel, self.spin)
+        return the_str
+
+class MassParticle(Particle):
+    def __init__(self, name="", position=(0.0, 0.0, 0.0), velocity=(0.0, 0.0, 0.0), spin=0.0, mass=0.0):
+        super(MassParticle, self).__init__(name, position, velocity, spin)
+        self.mass = mass
+    def __str__(self):
+        temp_str = super(MassParticle, self).__str__()
+        temp_str = temp_str + " and mass {0}\n".format(self.mass)
+        return temp_str
+
+class ChargeParticle(MassParticle):
+    def __init__(self, name="", position=(0.0, 0.0, 0.0), velocity=(0.0, 0.0, 0.0), spin=0.0, mass=0.0, charge=0.0):
+        super(ChargeParticle, self).__init__(name, position, velocity, spin, mass)
+        self.charge = charge
+    def __str__(self):
+        temp_str = super(MassParticle, self).__str__()
+        temp_str = temp_str + " and charge {0}".format(self.charge)
+        return temp_str
+
+if __name__ == "__main__":
+    photon = Particle(name="photon", spin=1.0)
+    tau = ChargeParticle(name="tau", spin=0.5, charge=-1.0, mass=1.777)
+    print(photon)
+    print(tau)