PythonCharmers/python-future

print() behavior change

Open

#473 opened on Jun 4, 2019

View on GitHub
 (0 comments) (0 reactions) (1 assignee)Python (327 forks)batch import
0.19bughelp wanted

Repository metrics

Stars
 (1,172 stars)
PR merge metrics
 (No merged PRs in 30d)

Description

$ cat print_failure.py 
print 'foo\n',
print 'bar\n',
$ python print_failure.py | xxd
00000000: 666f 6f0a 6261 720a                      foo.bar.
$ futurize -nw --no-diffs print_failure.py
$ cat print_failure.py 
from __future__ import print_function
print('foo\n', end=' ')
print('bar\n', end=' ')
$ python print_failure.py | xxd
00000000: 666f 6f0a 2062 6172 0a20                 foo. bar.

If the to be printed thing ends with a newline an additional space character is added to the output.

Contributor guide

Research direction
Trace the print statement translation in the futurize script to identify where the extra space is added after a newline.
Tech stack
python
Domain
tooling
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.
1-3 hours
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
Python
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70