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You are here: Home / Archives for Pandas 101

Pandas 101

How to convert row names to a column in Pandas

August 4, 2024 by cmdlinetips

In this tutoriual, we will learn how to convert the row name or row index name in a Pandas dataframe to a column. We will use Pandas’ reset_index() function to convert the index with name to a column. Let us load Pandas. Let us create a small dataframe in Pandas with rown index names. Our […]

Filed Under: Pandas 101, Pandas rename_axis, Pandas reset_index, Python Tips Tagged With: Convert row names to a column in Pandas

Pandas case_when() with multiple examples

February 12, 2024 by cmdlinetips

The newest Pandas release Pandas 2.2.0 has one of the most useful functions case_when() available on a Pandas Series object. Often you might want to create a new variable from an existing variable using multiple conditions. For a simple binary condition we can use Pandas’ where() function. With the new case_when() function we can apply […]

Filed Under: Pandas 101, Python, Python Tips Tagged With: Pandas case_when()

Difference between Pandas where() function and mask() function

October 10, 2022 by cmdlinetips

Difference between Pandas mask() and where()

Pandas mask() and where() functions are two related functions that are useful in Pandas to find if elements of Pandas dataframe satisfy a condition. They both preserve the shape of the dataframe. In this post, we will first see simple examples of using Pandas where() and mask() functions and then we will learn the key […]

Filed Under: Pandas 101, Python Tips, Uncategorized Tagged With: Pandas mask, Pandas where(), Pandas where() vs mask()

How to Find if Pandas Dataframe is empty

September 15, 2022 by cmdlinetips

In this tutorial, we will learn how to find if a Pandas dataframe is empty or not. Pandas empty method applied to a Pandas dataframe will tell us if the dataframe is empty or not. Pandas’ empty method will return True if the dataframe is empty and False otherwise. Let us see some examples of […]

Filed Under: Pandas 101, Python Tips Tagged With: Pandas empty

Pandas create new column using if else condition

September 9, 2022 by cmdlinetips

Add new column using i condition on. existing column in Pandas

In this quick tutorial, we will learn how to create a new column using if else condition on an existing column in a Pandas dataframe. To add new column using a condional on existing column we will use Numpy’s where function. So, let us load both numby and Pandas to get started. We. will use […]

Filed Under: Pandas 101, Python Tips Tagged With: Pandas new column using if condition

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