implement __new__ function in Square class

1 files changed, 12 insertions, 1 deletions

diff --git a/foo.py b/foo.py
index 823d1f7..006df8f 100644
--- a/foo.py
+++ b/foo.py
@@ -1,10 +1,21 @@
 class Foo:
     pass
+
 def hello():
     print('hello, world')
+
 x = 13
 
 class Square():
+    def __new__(cls, x):
+        instance = super(Square, cls).__new__(cls)
+        instance.__init__(x)
+        return instance.squared
     def __init__(self, x):
         self.inital = x
-        self.squared = x**2
+        self.squared = x**2  # without .self the variable would be shared among all instances
+    def __str__(self):
+        return str(self.__class__) + ": " + str(self.__dict__)
+
+area = Square(5.5) # if __new__ wasn't implemented, instead of 30.25 float print would call __str__ and return  <class '__main__.Square'>: {'inital': 5.5, 'squared': 30.25}
+print(area)
\ No newline at end of file