2886 Change Data Type

Problem Statement

DataFrame students

Column Name	Type
student_id	int
name	object
age	int
grade	float

Write a solution to correct the errors:

• The grade column is stored as floats, convert it to integers.

The result format is in the following example.

For the whole problem statement, please refer here.

Plans

• Import pandas to manipulate the DataFrame.

• Create a function named changeDatatype that takes a DataFrame as input.

• Use astype(int) to convert the grade column from float to int.

• Ensure the modified DataFrame is returned as the output.

Solution

import pandas as pd

def changeDatatype(students: pd.DataFrame) -> pd.DataFrame:
    # Change the data type of the 'grade' column to int
    students['grade'] = students['grade'].astype(int)

    # Change the data type of the 'age' column to int
    return students

Explanation

1. Import Pandas

   • We start by importing the Pandas library, which provides data structures and operations for manipulating numerical tables and time series.

2. Define the Function

   • We define a function changeDatatype that takes a single argument students, which is a DataFrame containing student data.

3. Changing Data Type

   • We use the astype(int) method on the grade column of the DataFrame students to convert the data type from float to int.

4. Return the Result

   • We return the modified DataFrame after changing the data type of the grade column to int.