Convert a list to a string in Python

David Y.

The Problem

How can I convert a list to a string in Python?

The Solution

We can do this using Python’s str.join() method. This method takes an iterable, such as a list, and returns a new string containing the iterable’s elements, concatenated with the original string as a separator. Consider the following examples:

fullname = " ".join(["John","Smith"]) print(fullname) # will output "John Smith" firstname = "".join(["J","o","h","n"]) print(firstname) # will output "John" fullname_alt = ", ".join(["Smith","John"]) print(fullname_alt) # will output "Smith, John"

If the list contains any non-string items, this method will raise a TypeError, so we may need to cast items to strings before using it. We can do this with a list comprehension:

my_numbers = [13, 7, 42] my_string = " ".join([str(number) for number in my_numbers]) print(my_string) # will output "13 7 42"

Get Started With Sentry

Get actionable, code-level insights to resolve Python performance bottlenecks and errors.

  1. Create a free Sentry account

  2. Create a Python project and note your DSN

  3. Grab the Sentry Python SDK

pip install --upgrade sentry-sdk
  1. Configure your DSN
import sentry_sdk sentry_sdk.init( "https://<key><project>", # Set traces_sample_rate to 1.0 to capture 100% # of transactions for performance monitoring. # We recommend adjusting this value in production. traces_sample_rate=1.0, )

Check our documentation for the latest instructions.

Loved by over 4 million developers and more than 90,000 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.

Share on Twitter
Bookmark this page
Ask a questionJoin the discussion

Related Answers

A better experience for your users. An easier life for your developers.

© 2024 • Sentry is a registered Trademark
of Functional Software, Inc.