Added Namedtuple basic operation

suman2826 · suman2826 · commit d26360e96b6c · 2020-10-26T12:27:17.000+05:30
diff --git a/Collections/namedtuple_basic.py b/Collections/namedtuple_basic.py
@@ -0,0 +1,25 @@
+#Like dictionaries it also contains keys that are hashed to a particular value.
+#It supports both access from key value and iteration
+from collections import namedtuple,col
+
+nd1 = namedtuple('Student',['name','age','DOB'])
+S = Student('suman','20','2612000')   
+print ("The Student age using index is : ",end ="")   
+print (S[1])
+#The Student age using index is : 20
+print ("The Student name using keyname is : ",end ="")   
+print (S.name) 
+#The Student name using keyname is : suman
+
+#this can also be accessed using getattr
+print ("The Student DOB using getattr() is : ",end ="") 
+print (getattr(S,'DOB'))
+#The Student DOB using getattr() is : 2612000
+
+#some methods that can be used to convert other collections into namedtuple
+nd2 = col.namedtuple('Employee',['name','city','salary'])
+my_list = ['Suman','Bangalore','100000']
+e1 = nd2._make(my_list)
+print(e1)
+#Employee(name='Asim', city='Delhi', salary='25000')
+
diff --git a/Collections/orderdict_basic.py b/Collections/orderdict_basic.py
@@ -0,0 +1,40 @@
+#It is a dictionary subclass that remembers the order that keys we re first inserted.
+from collections import OrderDict
+od1 = OrderDict()
+od1['a'] = 1
+od1['b'] =2
+od1['c'] = 3
+od1['d'] = 4
+for key,value in od1.items():
+	print(key,value)
+
+#answer
+# ('a', 1)
+# ('b', 2)
+# ('c', 3)
+# ('d', 4)
+
+# if the value of a certain key is changed the position of the key remain unchanged
+od2 = OrderDict()
+od2['a'] = 1
+od2['b'] =2
+od2['c'] = 3
+od2['d'] = 4
+for key,value in od2.items():
+	print(key,value)
+#answer
+# ('a', 1)
+# ('b', 2)
+# ('c', 3)
+# ('d', 4)
+od2['c'] = 5
+for key,value in od2.items():
+	print(key,value)
+#answer
+# ('a', 1)
+# ('b', 2)
+# ('c', 5)
+# ('d', 4)
+
+# Deleting and reinserting the same key will push it to the back as orderdict however maintains the order of insertion
+# It can be used as a stack with the help of popitem function.
