Learning Python: The Ultimate Guide for Beginners to Coding with Python with Useful Tools

Adding Key-Value Pairs

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Since dictionaries are structurally dynamic, we can add new pairs to them
whenever we want. For instance, we can add additional information to our
original  program  to  include  positions,  which  will  display  the  position  the
score  is  taken.  Let  the  home  team  be  on  the  left  position  while  the  away
team be on the right.
team1 ={‘color’: ‘red’, ‘scores’ : 3}
print(team1)
team1[‘home_team’] = left
team1[‘away_team’] = right
print(team1)
We began by defining a dictionary “team1” and included its key and values,
respectively, before printing the dictionary. In the second phase of the code,
we assign the home team to be on the left position while the away team is
on the right. If we print the program, our output will be:
{‘color’: ‘red,’ ‘scores’ : 3}
{‘color’: ‘red’, ‘scores’ : 3, ‘home_team’: left, ‘away_team’ : right}
In  our  final  program,  we  have  four  key-value  pairs,  where  we  added  two
positions, whereas the original two specifies only color and score.
At  times,  most  programmers  find  it  convenient,  to  begin  with,  empty
dictionary  unlike  what  we  did  by  adding  elements  first.  To  fill  an  empty
dictionary, you have to define the dictionary without adding any key-value
pairs. The dictionary will be empty with a set of braces. For instance, if we
are to define the color and scores dictionary, that will be as follows:
team1 = {}
team1[‘color’] = ‘red’
team1[‘score’] = 3
print(team1)
What  we  did  here  is  to  define  an  empty  team1  dictionary  before  adding
color  and  score  values,  respectively.  We  will  get  the  same  results  as  what
we got in our previous examples.
{‘color’: ‘red,’ ‘scores’ : 3}

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