add collections examples

Author: fishercoder1534

collections_examples.py

@@ -0,0 +1,36 @@
+from collections import Counter
+from collections import namedtuple
+from collections import defaultdict
+
+my_list = [1, 1, 1, 1, 1, 2, 2, 3, 3, 4, 3, 'a', 'abc', "fish"]
+print(Counter(my_list))
+
+sentence = "This is a super cool sentence, how cool is this?"
+print(Counter(sentence.split()))
+
+letters = "aaaaaaaabbbbbbbcccccdddddddd"
+c = Counter(letters)
+print(c.most_common())
+print(c.most_common(2))
+print(list(c))
+
+d = {'a': 10}
+print(d['a'])
+# print(d['WRONG_KEY']) # this will throw a key error
+d = defaultdict(lambda: 0)
+d['correct_key'] = 100
+print(d['correct_key'])
+print(d['wrong_key']) # this will get the default value instead of throwing a key error
+
+
+my_tuple = (10,20,30)
+print(my_tuple[0])
+
+Dog = namedtuple('Dog', ['age', 'breed', 'name'])
+sammy = Dog(age=5, breed='Husky', name='Sam')
+print(type(sammy))
+print(sammy)
+print(sammy[0])
+print(sammy[1])
+print(sammy[2])
+