str.lower() and str.upper() in Pandas - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to convert all names in the DataFrame to lowercase.

Pandas

import pandas as pd

data = {'Name': ['Alice', 'Bob', 'CHARLIE']}
df = pd.DataFrame(data)
df['Name_lower'] = df['Name'].str.[1]()
print(df)

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

Acapitalize

Btitle

Clower

Dswapcase

Attempts:

3 left

💡 Hint

Common Mistakes

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

Using str.capitalize() which only changes the first letter

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

2fill in blank

medium

Complete the code to convert all city names in the DataFrame to uppercase.

Pandas

import pandas as pd

data = {'City': ['Paris', 'london', 'New York']}
df = pd.DataFrame(data)
df['City_upper'] = df['City'].str.[1]()
print(df)

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

Aupper

Bcapitalize

Ctitle

Dswapcase

Attempts:

3 left

💡 Hint

Common Mistakes

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

Using str.title() which capitalizes first letters of words

The str.upper() method converts all characters in the string to uppercase.

3fill in blank

hard

Fix the error in the code to convert the 'Fruit' column to lowercase.

Pandas

import pandas as pd

data = {'Fruit': ['Apple', 'BANANA', 'Cherry']}
df = pd.DataFrame(data)
df['Fruit_lower'] = df['Fruit'].str.[1]()
print(df)

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

Alowercase

Blower

Cto_lower

Dlower_case

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent methods like lower_case or to_lower

Trying to use lowercase instead of lower

The correct method to convert strings to lowercase is str.lower(). Other options are invalid method names.

4fill in blank

hard

Fill both blanks to create a dictionary with fruit names in uppercase as keys and their lengths as values, only for fruits longer than 5 letters.

Pandas

fruits = ['apple', 'banana', 'cherry', 'date']
lengths = {fruit.[1](): len(fruit) for fruit in fruits if len(fruit) [2] 5}
print(lengths)

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

Aupper

B>

C<

Dlower

Attempts:

3 left

💡 Hint

Common Mistakes

Using lower() instead of upper() for keys

Using < instead of > in the condition

We use upper() to convert fruit names to uppercase keys. The condition > 5 filters fruits with length greater than 5.

5fill in blank

hard

Fill all three blanks to create a dictionary with uppercase fruit names as keys, their lowercase versions as values, only for fruits with names longer than 4 letters.

Pandas

fruits = ['Apple', 'Banana', 'Fig', 'Grape']
result = {fruit.[1](): fruit.[2]() for fruit in fruits if len(fruit) [3] 4}
print(result)

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

Aupper

Blower

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up upper() and lower() for keys and values

Using < instead of > in the condition

The keys are uppercase fruit names using upper(). The values are lowercase using lower(). The condition > 4 filters fruits longer than 4 letters.