Adding source code files for Chapter 6

Chapter6/comprehension/dictcomp1.py

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+#dictcomp1.py
+
+dict1 = {'a': 100, 'b': 200, 'c': 300}
+dict2 =	{x : int(y/2) for (x, y) in dict1.items() if y <=200}
+print(dict2)
+
+dict3 = {}
+for x,y in dict1.items():
+    if y <= 200:
+        dict3[x] = int(y/2)
+print(dict3)

Chapter6/comprehension/gencomp1.py

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+#gencomp1.py
+
+list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+gen1 =	(x for x in list1 if x % 2 ==0)
+print(gen1)

Chapter6/comprehension/list1.py

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+#list1.py
+
+list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+list2 =	[x+1 for x in list1]
+print(list2)
+
+list3 = []
+for x in list1:
+    list3.append(x+1)
+print(list3)

Chapter6/comprehension/list2.py

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+#list2.py
+
+list1 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+list2 =	[x for x in list1 if x % 2 == 0]
+print(list2)
+

Chapter6/comprehension/setcomp1.py

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+#setcomp1.py
+
+
+list1 = [1, 2, 6, 4, 5, 6, 7, 8, 9, 10, 8]
+set1 =	{x for x in list1 if x % 2 ==0}
+print(set1)
+
+set2 = set()
+for x in list1:
+    if x % 2 == 0:
+        set2.add(x)
+print(set2)