Change one value
Write a pandas program to change John's age to 24. Step-by-step explanation, colour-coded code and real output.
SQA Tools Blog
Learn testing and automation, one article at a time
Free tutorials, solved practice problems and interview prep for QA and automation engineers: Python, Playwright, Selenium, SQL, Git and more.
1,677Articles
1,141Solved Python problems
7Topics
100%Free
Latest articles
1,677 articles · page 87 of 140Ages between 25 and 30
Write a pandas program to print rows where age is between 25 and 30. Step-by-step explanation, colour-coded code and real output.
Rows with missing age
Write a pandas program to select rows where age is missing. Step-by-step explanation, colour-coded code and real output.
Count rows and columns
Write a pandas program to count the rows and columns. Step-by-step explanation, colour-coded code and real output.
Rows where age > 29
Write a pandas program to select the rows where age is greater than 29. Step-by-step explanation, colour-coded code and real output.
Select a row
Write a pandas program to print a selected row. Step-by-step explanation, colour-coded code and real output.
Select columns
Write a pandas program to print selected columns. Step-by-step explanation, colour-coded code and real output.
Last n rows
Write a pandas program to print the last n rows. Step-by-step explanation, colour-coded code and real output.
First n rows
Write a pandas program to print the first n rows. Step-by-step explanation, colour-coded code and real output.
Dictionary to DataFrame
Write a pandas program to convert a dictionary into a DataFrame. Step-by-step explanation, colour-coded code and real output.
Index of smallest and largest
Write a pandas program to find the index of the smallest and largest values. Step-by-step explanation, colour-coded code and real output.
Date strings to datetimes
Write a pandas program to convert date strings in different formats into datetimes. Step-by-step explanation, colour-coded code and real output.
Preparing for a QA interview?
Take free timed mock tests with answers and explanations.