str.len() for string length in Pandas - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to get the length of each string in the 'Name' column.

Pandas

df['Name_length'] = df['Name'].str.[1]()

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

Alen

Blength

Ccount

Dsize

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'length' instead of 'len' causes an AttributeError.

Using 'count' counts occurrences of a substring, not string length.

The str.len() function returns the length of each string in the Series.

2fill in blank

medium

Complete the code to filter rows where the 'City' name length is greater than 5.

Pandas

filtered = df[df['City'].str.len() [1] 5]

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

A<

B==

C<=

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<=' selects shorter or equal length strings, not longer ones.

Using '==' selects only strings exactly length 5.

The condition str.len() > 5 selects rows where the city name has more than 5 characters.

3fill in blank

hard

Fix the error in the code to correctly calculate string lengths in the 'Country' column.

Pandas

lengths = df['Country'].str.[1]()

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

Alen

Blen()

Clength()

Dlength

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'len' without parentheses returns the method object instead of the lengths.

Using 'length' or 'length()' causes AttributeError.

The str.len() method is used with parentheses to get a Series of lengths.

4fill in blank

hard

Fill both blanks to create a dictionary of word lengths for words longer than 4 characters.

Pandas

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

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

A__len__()

Blen()

C>

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'len()' in the first blank causes an error because 'len' is a function, not a method of string.

Using '<=' in the second blank selects shorter words, not longer.

Use word.__len__() to get the length of each word, and filter words with length greater than 4 using >.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase words as keys and their lengths as values for words shorter than 6 characters.

Pandas

result = { [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()' for keys.

Using '>' instead of '<' in the filter condition.

Using 'word' instead of 'len(word)' for values.

The dictionary keys are uppercase words (word.upper()), values are their lengths (len(word)), and the filter selects words shorter than 6 (<).