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Python: Add a key to a dictionary

Python dictionary: Exercise-2 with Solution

Write a Python program to add a key to a dictionary.

Sample Solution:-

Python Code:

d = {0:10, 1:20}
print(d)
d.update({2:30})
print(d)

Sample Output:

{0: 10, 1: 20}                                                                                                
{0: 10, 1: 20, 2: 30} 

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Python: Tips of the Day

Access an Element in a Sequence Using the Reverse Index:

>>> a = 'Hello World!'
  >>> # instead of using a[len(a)-1]
  >>> a[-1]
  '!'
  >>> # in combination with slicing
  >>> a[-5:-1]
  'orld'