Adding source code files for Chapter 6

Chapter6/mapfilterreduce/filter1.py

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+# filter1.py to get even numbers from a list
+
+def is_even(num):
+    return (num % 2 == 0)
+
+mylist = [1, 2, 3, 4, 5,6,7,8,9]
+new_list = list(filter(is_even, mylist))
+print(new_list)

Chapter6/mapfilterreduce/filter2.py

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+# filter1.py to get even numbers from a list
+
+def is_dublicate(item):
+    return not(item in mylist)
+
+mylist = ["Orange","Apple", "Banana", "Peach", "Banana"]
+new_list = list(filter(is_dublicate, mylist))
+print(new_list)

Chapter6/mapfilterreduce/filter3.py

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+# filter1.py to get even numbers from a list
+
+def is_even(num):
+    return (num % 2 == 0)
+
+def contains_e(name):
+    return 'e' in name
+
+mylist1 = [1, 2, 3, 4, 5,6,7,8,9]
+mylist2 = ["Orange","Apple", "Banana", "Peach", "Banana"]
+new_list1 = list(filter(is_even, mylist1))
+new_list2 = list(filter(contains_e, mylist2))
+print(new_list1)
+print(new_list2)

Chapter6/mapfilterreduce/map1.py

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+#map1.py to get sqauare of each item in a list
+
+mylist = [1, 2, 3, 4, 5]
+new_list = []
+
+for item in mylist:
+    square = item*item
+    new_list.append(square)
+
+print(new_list)

Chapter6/mapfilterreduce/map2.py

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+# map2.py to get square of each item in a list
+
+def square(num):
+    return num * num
+
+mylist = [1, 2, 3, 4, 5]
+new_list = list(map(square, mylist))
+print(new_list)

Chapter6/mapfilterreduce/map3.py

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+# map3.py to get product of corresponding item in the two lists
+
+def product(num1, num2):
+    return num1 * num2
+
+mylist1 = [1, 2, 3, 4, 5]
+mylist2 = [6, 7, 8, 9]
+new_list = list(map(product, mylist1, mylist2))
+print(new_list)

Chapter6/mapfilterreduce/reduce1.py

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+# reduce1.py to get sum of numbers from a list
+from functools import reduce
+
+def seq_sum(num1, num2):
+    return num1+num2
+
+mylist = [1, 2, 3, 4, 5]
+result = reduce(seq_sum, mylist, 10)
+print(result)