Page 432 - Computer Science V2.0 Class 11

2. Can you use the function wordCountDict(lst)that you developed in a previous question to count the number
of occurrences of numbers in a list.
Answer: Yes, because the function does not make use of the fact that the objects in the list are strings. So, it is
applicable to any list of objects, including heterogeneous lists. However, the objects in the list should be immutable
because we are using them as keys in the dictionary.
Example:
>>> wordCountDict(['ab', 7, (2, 3, 4), 27, 7, 'ab', (2, 3, 4), (1, 2, 3)])
{'ab': 2, 7: 2, (2, 3, 4): 2, 27: 1, (1, 2, 3): 1}
>>> wordCountDict(['ab', 7, [2, 3, 4], 27, 7, 'ab', [2, 3, 4], {1:1, 2:4}])
Traceback (most recent call last):
File "<pyshell#25>", line 1, in <module>
wordCountDict(['ab', 7, [2, 3, 4], 27, 7, 'ab', [2, 3, 4], {1:1, 2:4}])
File "F:\DOWNLOADS\try1.py", line 15, in wordCountDict
if w in wordCount:
TypeError: unhashable type: 'list'
3. Write a function stateCapitalDict() that prompts a user to enter some states and capitals and outputs a
dictionary stateCapital. Make use of the function stateCapitalDict() to write a menu driven program
that does the following:
a. Create a dictionary of state capitals.

b. Accept from the user the name of the state, and find its capital. If the name of a state does not appear in the
dictionary, ask the user "Would you like to add the corresponding capital". If yes, accept state:capital pair and
add to the dictionary.

c. Accept from a user a city's name and find the state whose capital is the city entered by the user. Display appropriate
messages.

01 def stateCapitalDict():
02 '''
03 Input Parameter: None

04 Return Value: stateCapital - Dictionary containing state as keys and capital as values
05 '''
06
07 stateCapital = dict()
08 state = input('Enter state:')
09 capital = input('Enter capital:')
10 while state != '' and capital != '':
11 stateCapital[state] = capital
12 state = input('Enter state:')
13 capital = input('Enter capital:')
14 return stateCapital
15
16
17 def searchCapital(myDict, state):
18 '''

19 Input Parameters: myDict - Dictionary containing state as keys and capital as values
20 state - state for which capital is to be determined
21
22 Return Value:
23 capital, if state is present as key in the dictionary
24 updated dictionary with new entry for the state and capital, otherwise
25 '''
26 if state in myDict:
27 print('Capital of', state, 'is',myDict[state])
28 else:
29 print('No record found for given state!')

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