str.replace() for substitution in Pandas - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to replace all occurrences of 'cat' with 'dog' in the 'animal' column.

Pandas

df['animal'] = df['animal'].str.[1]('cat', 'dog')

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

Aswap

Bsubstitute

Creplace

Dchange

Attempts:

3 left

💡 Hint

Common Mistakes

Using a method name that does not exist like 'substitute' or 'swap'.

Trying to replace without using the str accessor.

The str.replace() method replaces all occurrences of a substring with another substring in a pandas Series.

2fill in blank

medium

Complete the code to replace all digits in the 'code' column with '#' using a regular expression.

Pandas

df['code'] = df['code'].str.[1]('\d', '#', regex=True)

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

Aswap

Bsub

Ctranslate

Dreplace

Attempts:

3 left

💡 Hint

Common Mistakes

Using sub which is not a pandas string method.

Not setting regex=True when using a regex pattern.

The str.replace() method supports regular expressions when regex=True is set, allowing pattern-based replacements.

3fill in blank

hard

Fix the error in the code to replace 'yes' with 'no' in the 'answer' column.

Pandas

df['answer'] = df['answer'].str.[1]('yes', 'no')

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

Areplace

Bstr.replace()

Cstr.replace

Dreplace()

Attempts:

3 left

💡 Hint

Common Mistakes

Including parentheses in the method name inside the code string.

Using str.replace without calling it as a method.

When using pandas string methods, you call str.replace() on the Series with str. accessor, but here the accessor is already used, so just replace is the method name.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that maps words to their uppercase form only if the word length is greater than 4.

Pandas

{word: word[1]() for word in words if len(word) [2] 4}

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

A.upper

B>

C<

D.lower

Attempts:

3 left

💡 Hint

Common Mistakes

Using .lower instead of .upper.

Using less than operator instead of greater than.

The method upper() converts strings to uppercase. The condition len(word) > 4 filters words longer than 4 characters.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps the uppercase word to its length only if the length is less than 6.

Pandas

{ [1]: [2] for word in words if len(word) [3] 6 }

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

Aword.upper()

Blen(word)

C<

Dword.lower()

Attempts:

3 left

💡 Hint

Common Mistakes

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

Using greater than operator instead of less than.

The key is the uppercase word using word.upper(). The value is the length with len(word). The condition filters words with length less than 6 using <.