nteract/papermill

\r characters replaced by \r\n

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#722 opened on Apr 27, 2023

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 (1 comment) (0 reactions) (0 assignees)Python (402 forks)batch import
bughelp wanted

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Description

🐛 Bug

Consider the following cell: image When running normally (i.e., through interactive python), each time a new line is printed, the \r put the cursor back to the start of the line which is replaced by the next print, and the final output of the cell should be only the last print: Hello World! 20

However if I use papermill to run the notebook with I get the following output: image

This is also affecting tdqm progress bar which output becomes an unreadable mess: image

Is someone else encountering the issue ? I'm using it inside a Docker installation.

Contributor guide

Research direction
Investigate how papermill captures and processes stdout from executed cells, specifically the handling of carriage return characters (\r). Look for any stream encoding or line ending conversion that might replace \r with \r\n.
Tech stack
python
Domain
backendcli
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonJupyter Notebooks
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70