Counter_defaultdict_OrderedDict.py

Counter_defaultdict_OrderedDict.py

from collections import Counter, defaultdict, OrderedDict

li = [1,2,3,4,5,6,7,7,7]
sentance = "blah blah blah thinking about python"

print(Counter(li)) # will return Counter({7: 3, 1: 1, 2: 1, 3: 1, 4: 1, 5: 1, 6: 1})
print(Counter(sentance)) # will return Counter({'h': 5, ' ': 5, 'b': 4, 'a': 4, 'l': 3, 't': 3, 'n': 3, 'i': 2, 'o': 2, 'k': 1, 'g': 1, 'u': 1, 'p': 1, 'y': 1})

dictionary = defaultdict(lambda: "does not exist", {"a":1, "b": 2})
print(dictionary['c']) # will return 'does not exist'

#Ordered dictionary
d = OrderedDict()
d['a'] = 1
d['b'] = 2

d2 = OrderedDict()
d2['b'] = 2
d2['a'] = 1

print(d2 == d) # will return False

#regular dictionary
d3 = {'c':100}
d3['a'] = 1
d3['b'] = 2

d4 = {'c':100}
d4['b'] = 2
d4['a'] = 1

print(d3 == d4) # will return True