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Author: Kamesh-Mishra

snippets/python/OrderedDict.md

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+# OrderedDict in Python
+An OrderedDict is a dictionary subclass that remembers the order that keys were first inserted. 
+The only difference between dict() and OrderedDict() is that:
+
+OrderedDict preserves the order in which the keys are inserted. A regular dict doesn’t track the 
+insertion order, and iterating it gives the values in an arbitrary order. By contrast, the order the
+items are inserted is remembered by OrderedDict.
+
+_tags_: OrderedDict
+
+
+# Snippet
+```
+# A Python program to demonstrate working of OrderedDict 
+
+from collections import OrderedDict 
+  
+print("This is a Dict:\n") 
+d = {} 
+d['a'] = 1
+d['b'] = 2
+d['c'] = 3
+d['d'] = 4
+  
+for key, value in d.items(): 
+    print(key, value) 
+  
+print("\nThis is an Ordered Dict:\n") 
+od = OrderedDict() 
+od['a'] = 1
+od['b'] = 2
+od['c'] = 3
+od['d'] = 4
+  
+for key, value in od.items(): 
+    print(key, value)
+```