Sentry Answers>Python>

Make a list of the column headers in a Python Pandas DataFrame

Make a list of the column headers in a Python Pandas DataFrame

David Y.

—

The Problem

How can I create a list of the column headers in a Python Pandas DataFrame?

The Solution

The simplest way to do this is by directly casting the DataFrame to a list:

Click to Copy
import pandas

data = {
    "A": [1, 2, 3],
    "B": [4, 5, 6],
    "C": [7, 8, 9]
}
df = pandas.DataFrame(data)
column_names = list(df)

print(column_names) # will print ['A', 'B', 'C']

A more explicit and performant method would be to use df.columns.values and its tolist method:

Click to Copy
import pandas

data = {
    "A": [1, 2, 3],
    "B": [4, 5, 6],
    "C": [7, 8, 9]
}
df = pandas.DataFrame(data)

column_names = df.columns.values.tolist()

print(column_names) # will print ['A', 'B', 'C']
  • Sentry BlogPython Performance Testing: A Comprehensive Guide
  • Syntax.fmListen to the Syntax Podcast
  • Sentry BlogLogging in Python: A Developer’s Guide
  • CodecovPython - Codecov
  • Syntax.fm logo
    Listen to the Syntax Podcast

    Tasty treats for web developers brought to you by Sentry. Get tips and tricks from Wes Bos and Scott Tolinski.

    SEE EPISODES

Considered “not bad” by 4 million developers and more than 150,000 organizations worldwide, Sentry provides code-level observability to many of the world’s best-known companies like Disney, Peloton, Cloudflare, Eventbrite, Slack, Supercell, and Rockstar Games. Each month we process billions of exceptions from the most popular products on the internet.

learn more about sentryjoin our discord