第8章结束 类结束

Author: tan00

src/8/calling_a_method_on_an_object_given_the_name_as_a_string/example.py

@@ -20,7 +20,7 @@ def distance(self, x, y):
 
 # Method 2: Use methodcaller
 import operator
-d = operator.methodcaller('distance', 0, 0)(p)
+d = operator.methodcaller('diistance', 0, 0)(p)
 print(d)
 
 # Application in sorting

src/8/creating_an_instance_without_invoking_init/example.py

@@ -16,20 +16,21 @@ def today(cls):
         d.day = t.tm_mday
         return d
 
-d = Date.__new__(Date)
-print(d)
-print(hasattr(d,'year'))
+# d = Date.__new__(Date)
+# print(d)
+# print(hasattr(d,'year'))
 
-data = { 
-    'year' : 2012,
-    'month' : 8,
-    'day' : 29
-}
+# data = { 
+#     'year' : 2012,
+#     'month' : 8,
+#     'day' : 29
+# }
 
-d.__dict__.update(data)
-print(d.year)
-print(d.month)
+# d.__dict__.update(data)
+# print(d.year)
+# print(d.month)
 
 d = Date.today()
+
 print(d.year, d.month, d.day)
 

src/8/creating_an_instance_without_invoking_init/myexample.py

@@ -0,0 +1,18 @@
+from time import localtime
+
+class Date:
+    def __init__(self, year, month, day):
+        self.year = year
+        self.month = month
+        self.day = day
+
+   
+    @classmethod
+    def today(cls):
+        t = localtime()
+        return cls(t.tm_year,t.tm_mon,t.tm_mday)
+
+
+d = Date.today()
+
+