Creating dictionary from two sequences in Python - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a dictionary by pairing keys and values from two lists.

Python

keys = ['a', 'b', 'c']
values = [1, 2, 3]
d = dict(zip(keys, [1]))
print(d)

Drag options to blanks, or click blank then click option'

Avalues

Bkeys

Crange(3)

Dlist

Attempts:

3 left

💡 Hint

Common Mistakes

Using keys instead of values in zip.

Using range instead of the values list.

The zip function pairs elements from keys and values. To create the dictionary, we need to zip keys with values.

2fill in blank

medium

Complete the code to create a dictionary from two lists using a dictionary comprehension.

Python

keys = ['x', 'y', 'z']
values = [10, 20, 30]
d = {k: [1] for k, v in zip(keys, values)}
print(d)

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Ak

Bvalues

Ckeys

Dv

Attempts:

3 left

💡 Hint

Common Mistakes

Using the key variable as the value.

Using the whole list instead of the variable.

In the comprehension, k is the key and v is the value from the zipped pairs. We want the dictionary to map keys to values, so the value is v.

3fill in blank

hard

Fix the error in the code to correctly create a dictionary from two lists.

Python

keys = ['name', 'age', 'city']
values = ['Alice', 30, 'NY']
d = dict([1](keys, values))
print(d)

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Azip

Bmap

Cset

Dlist

Attempts:

3 left

💡 Hint

Common Mistakes

Using map instead of zip.

Using list or set which do not pair elements.

The dict function expects an iterable of key-value pairs. The zip function pairs elements from two lists, which is the correct input.

4fill in blank

hard

Fill both blanks to create a dictionary from two lists where keys are uppercase.

Python

keys = ['a', 'b', 'c']
values = [1, 2, 3]
d = {k[1]: v for k, v in zip(keys, [2])}
print(d)

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A.upper()

Bvalues

Ckeys

D.lower()

Attempts:

3 left

💡 Hint

Common Mistakes

Using .lower() instead of .upper().

Zipping keys with keys instead of values.

The keys are converted to uppercase using .upper(). The values come from the values list zipped with keys.

5fill in blank

hard

Fill all three blanks to create a dictionary from two lists, including only pairs where value is greater than 10.

Python

keys = ['p', 'q', 'r', 's']
values = [5, 15, 25, 8]
d = {k[1]: v for k, v in zip([2], [3]) if v > 10}
print(d)

Drag options to blanks, or click blank then click option'

A.upper()

Bkeys

Cvalues

D.lower()

Attempts:

3 left

💡 Hint

Common Mistakes

Using .lower() instead of .upper().

Swapping keys and values in zip.

Not filtering values greater than 10.

The keys are converted to uppercase with .upper(). The zipped lists are keys and values. The dictionary includes only pairs where the value is greater than 10.