Pi and deg2rad have to be defined if the script is imported too.

physics/parabelfunc.py

@@ -7,6 +7,11 @@ from math import sin, cos, tan, sqrt
 from time import sleep
 
 
+# pi is not defined by default
+pi = 3.1416
+deg2rad = pi / 180
+
+
 ########################################################################################
 def berechneflugbahn(xmax, ymax, steps, startwinkel, startgeschwindigkeit, xmin=0, ymin=0, starthoehe=0, gravitation=9.81, xstep=1):
     x = 0
@@ -79,9 +84,7 @@ if __name__ == "__main__":
     cows = "🐵🐒🦍🦧🐕🐯🦝🐩🐅🐴🐎🦄🦌🐗🐂🐃🐄🐪🐫🦙🦒🐹🦘🦡🐧🕊️ 🦅🦆🦉🐍🦎🐊🦜🦚🦩🐲🐉🦕"
     cowlistlength = len(cows)
     cow = cows[random.randint(0, cowlistlength - 1)]
-    # pi is not defined by default
-    pi = 3.1416
-    deg2rad = pi / 180
+
 
     # Needed: find our screensize. We are in textmode here
     termsize_xy = os.get_terminal_size()