read_csv: chunksize clashes with nrows · Issue #6774 · pandas-dev/pandas (original) (raw)

Skip to content

Navigation Menu

• • GitHub Copilot Write better code with AI
  • GitHub Advanced Security Find and fix vulnerabilities
  • Actions Automate any workflow
  • Codespaces Instant dev environments
  • Issues Plan and track work
  • Code Review Manage code changes
  • Discussions Collaborate outside of code
  • Code Search Find more, search less
• Explore
  • Learning Pathways
  • Events & Webinars
  • Ebooks & Whitepapers
  • Customer Stories
  • Partners
  • Executive Insights
• • GitHub Sponsors Fund open source developers
  • The ReadME Project GitHub community articles
• • Enterprise platform AI-powered developer platform
• Pricing

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Sign up

Appearance settings

Description

If nrows are determined, the use of chunksize option does not create a TextFileReader object.

reader = pd.read_table(fname, sep=',',chunksize=4, na_values=['null'], nrows=20) type(reader)

pandas.core.frame.DataFrame

My suggestion:

• Either put into docs that they are not to be used concurrently
• or it's a feature request that they can.

I would find it useful to get chunks of x size, but only for the first n row of a huge file.