adding all files done so far

learning/property/property1.py

@@ -0,0 +1,26 @@
+class P:
+
+    def __init__(self, x):
+        print('init')
+        self._x = x
+
+    @property
+    def x(self):
+        print('get')
+        return self._x
+
+    @x.setter
+    def x(self, x):
+        print('set')
+        if x < 0:
+            self._x = 0
+        elif x > 1000:
+            self._x = 1000
+        else:
+            self._x = x
+
+    def double(self):
+        return self.x * 2
+
+    def overwrite(self):
+        self.x = 20