real life operations with data types

Author: rayxtr

Dictionaries.py

@@ -0,0 +1,31 @@
+#store data in key-value pair , key immutable unique, value can be mutable duplicates
+
+#Create
+dc = {
+    1:'ankit',
+    2:'rahul',
+    3:'aditi',
+    4:'anjali'
+}
+#Read
+print(dc[1]) # get value of key
+print(dc.keys())  #get all keys
+dc.values() # get all values
+
+se ={}
+lis = [2,3,4,4,5,4,3,7,8]
+
+fe={}
+
+for x in range(len(lis)):
+        fe[100+x]= lis[x]
+        
+print(fe)
+for k , v in fe.items():
+      print(k,'---',v)
+for x in lis:
+    se[x]=se.get(x,0)+1
+
+
+
+print(se)

list.py

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+#Create a list
+list = [1,2,4,5,7,8,9]
+#Read a list
+print(list[2])
+
+print(list[-2])
+
+#update a list
+list[0]=3;
+
+# add 
+list.append('value')
+
+
+list.insert(2,'Here')  # 2 is index and value placed
+
+print(list)
+a = list.copy()  # copy a list
+print(a)
+
+print(list.pop())  # Remove a value from top
+list.clear()  # Clear a list.
+print(list)
+#a.remove(11) Remove a value 
+
+
+#del(a); # Completely Delete a list
+a.remove('Here')
+a.remove('value')
+print(len(a))
+a.sort() # sort a list.
+c = sorted(a)  #Create a another list which is sorted. 
+print(c)
+# if any list has mix datatype elements 
+b =  [1,2,3,'m','j',0.2,0.7,8,7]
+
+num = [x for x in b if isinstance(x, (int, float))]
+stri = [x for x in b if isinstance(x,str)]
+
+final = num+stri
+print(final)
+
+final.reverse()
+print(final)
+
+
+