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How to Convert Columns to Rows in Pandas [All Method]️

Q: What is the best way to approach this problem?

Check out this blog code to learn how to fix errors.

Richard ParkerFebruary 8, 2022

1 minute read

How to Convert Columns to Rows in Pandas [All Method]️ — How to Convert Columns to Rows in Pandas All Method

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Question: What is the best way to approach this problem? Answer: Check out this blog code to learn how to fix errors How to Convert Columns to Rows in Pandas. Question: What are the reasons for this code mistake and how can it be fixed? Answer: You can find a solution by following the advice in this blog.

How can we convert columns into rows in a Pandas DataFrame?

Example scenario

Suppose we’re dealing with a DataFrame df that looks something like this.

name    area    2019    2020    2021
A       B       0       2       4
C       D       1       3       5

We want to transform the DataFrame to look like this.

How to Sort a List of Dictionaries By Field in Python [All Method]️

name    area    year    value
A       B       2019    0
C       D       2019    1
A       B       2020    2
C       D       2020    3
A       B       2021    4
C       D       2021    5

Transform using `melt()`

We want to do a few things:

Keep the name and area headers (id_vars)
Create a new header year that uses the remaining headers as row values (var_name)
Create a new header value that uses the remaining row values as row values (value_name)

df.melt(id_vars=["name", "area"], 
        var_name="year", 
        value_name="value")

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