Vector2d class

flash_cards.py

@@ -0,0 +1,49 @@
+import random
+from vector2d import Vector2d
+def print_conversion(vector, str): 
+    if str == "polar":  
+        print(40 * "-")  
+        print(f"Convert {vector.x}i + {vector.y}j to polar form")
+        print(40 * "-")
+    elif str == "rectangular":  
+        print(40 * "-")
+        print(f"Convert <{abs(vector)}, {vector.angle()}> to rectangular form") 
+        print(40 * "-")  
+
+def print_polar_conversion(vector): 
+    print(40 * "-")  
+    print(f"Convert {vector.x}i + {vector.y}j to polar form")
+    print(40 * "-") 
+
+def print_rectangular_conversion(vector): 
+    print(40 * "-")
+    print(f"Convert <{abs(vector)}, {vector.angle()}> to rectangular form") 
+    print(40 * "-") 
+
+def generate_vector():  
+    random_x = random.randint(-20,21) 
+    random_y = random.randint(-20,21)
+    return Vector2d(random_x, random_y) 
+
+def print_conversion_solution(vector, str): 
+    if str == "polar": 
+        print(f"<{abs(vector)}, {vector.angle()}>") 
+    elif str == "rectangular": 
+        print(f"{vector.x}i + {vector.y}j")  
+
+def print_polar_conversion_solution(vector): 
+    print(f"<{abs(vector)}, {vector.angle()}>") 
+
+def print_rectangular_conversion_solution(vector):
+    print(f"{vector.x}i + {vector.y}j")
+
+if __name__ == '__main__':
+        while True:
+            question = input("Would you like to practice polar or rectangular form?") 
+            generated_vector = generate_vector()
+            if question == "polar":
+                input(f"{print_polar_conversion(generated_vector)} \n Your answer here ->")  
+                input(f"Correct answer: {print_polar_conversion_solution} \n Press c to continue and press q to quit")
+
+            # But don't forget to break at the right time!
+            break

main.py

@@ -0,0 +1,30 @@
+import math
+class Vector2d:
+    def __init__(self, x, y): 
+        self.x = x 
+        self.y = y 
+    def __repr__(self): 
+        return Vector2d(self.x, self.y)
+    def __str__(self): 
+        return f"{self.x}i + {self.y}j"
+    def __abs__(self):   
+        c = self.x ** 2 + self.y ** 2
+        return c ** (1/2) 
+    def __neg__(self): 
+        return Vector2d(self.x * -1, self.y * -1) 
+    def __add__(self, other): 
+        sum_x = self.x + other.x 
+        sum_y = self.y + other.y 
+        return Vector2d(sum_x,sum_y) 
+    def __eq__(self, other): 
+        if self.x == other.x and self.y == other.y: 
+            return True  
+    def __sub__(self, other): 
+        dif_x = self.x - other.x 
+        dif_y = self.y - other.y 
+        return Vector2d(dif_x, dif_y)
+    def angle(self): 
+        return math.degrees(math.atan2(self.y, self.x))
+
+test = Vector2d(3,4) 
+test1 = Vector2d(1,1)

vector2d.py

@@ -12,7 +12,7 @@ def __str__(self):
         return f"{self.x}i + {self.y}j"
 
     def __abs__(self):
-        return (self.x ** 2 + self.y ** 2) ** .5
+        return round((self.x ** 2 + self.y ** 2) ** .5, 1)
 
     def __neg__(self):
         return Vector2d(-self.x, -self.y)
@@ -27,4 +27,6 @@ def __sub__(self, other):
         return Vector2d(self.x - other.x, self.y - other.y)
 
     def angle(self):
-        return math.degrees(math.atan2(self.y, self.x))
+        return round(math.degrees(math.atan2(self.y, self.x)), 1) 
+
+test = Vector2d(3, 4)