String methods on Series in Data Analysis Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to convert all strings in the Series to lowercase.

Data Analysis Python

import pandas as pd

s = pd.Series(['Apple', 'Banana', 'Cherry'])
lower_s = s.str.[1]()

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

Aupper

Blower

Ccapitalize

Dtitle

Attempts:

3 left

💡 Hint

Common Mistakes

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

Forgetting to use the str accessor before the method

The str.lower() method converts all characters in each string of the Series to lowercase.

2fill in blank

medium

Complete the code to check if each string in the Series contains the letter 'a'.

Data Analysis Python

import pandas as pd

s = pd.Series(['Apple', 'Banana', 'Cherry'])
contains_a = s.str.[1]('a')

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Astartswith

Bendswith

Ccontains

Dmatch

Attempts:

3 left

💡 Hint

Common Mistakes

Using str.startswith() or str.endswith() which only check start or end

Using str.match() which expects a regex pattern for full match

The str.contains() method checks if each string contains the specified substring.

3fill in blank

hard

Fix the error in the code to replace all occurrences of 'a' with 'o' in the Series.

Data Analysis Python

import pandas as pd

s = pd.Series(['Apple', 'Banana', 'Cherry'])
replaced = s.str.[1]('a', 'o')

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Achange

Bsubstitute

Cswitch

Dreplace

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent methods like str.substitute or str.switch

Forgetting to use the str accessor

The correct method to replace substrings in Series strings is str.replace().

4fill in blank

hard

Fill both blanks to create a dictionary with words as keys and their lengths as values, only for words longer than 5 characters.

Data Analysis Python

words = ['apple', 'banana', 'cherry', 'date']
lengths = {word: [1] for word in words if [2]

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Alen(word)

Blen(word) > 5

Cword.startswith('b')

Dword == 'apple'

Attempts:

3 left

💡 Hint

Common Mistakes

Using word.startswith('b') which filters by first letter

Using word == 'apple' which filters only one word

The dictionary comprehension uses len(word) as value and filters words with length greater than 5.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase words as keys and their lengths as values, only for words containing 'e'.

Data Analysis Python

words = ['apple', 'banana', 'cherry', 'date']
result = { [1]: [2] for word in words if word.[3]('e') }

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

Aword.upper()

Blen(word)

Ccontains

Dstartswith

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'startswith' instead of 'contains' for filtering

Not converting words to uppercase for keys

The dictionary comprehension uses word.upper() as key, len(word) as value, and filters words containing 'e' using str.contains.