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awesome-cheatsheets | ‍‍ Awesome cheatsheets | Learning library

 by   LeCoupa JavaScript Version: Current License: MIT

 by   LeCoupa JavaScript Version: Current License: MIT

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kandi X-RAY | awesome-cheatsheets Summary

awesome-cheatsheets is a JavaScript library typically used in Telecommunications, Media, Media, Entertainment, Tutorial, Learning applications. awesome-cheatsheets has no vulnerabilities, it has a Permissive License and it has medium support. However awesome-cheatsheets has 12 bugs. You can download it from GitHub.
WEBSITE DIRECTORY: Available here. 📚 Awesome cheatsheets for popular programming languages, frameworks and development tools. They include everything you should know in one single file.
Support
Support
Quality
Quality
Security
Security
License
License
Reuse
Reuse

kandi-support Support

  • awesome-cheatsheets has a medium active ecosystem.
  • It has 21765 star(s) with 3649 fork(s). There are 614 watchers for this library.
  • It had no major release in the last 12 months.
  • There are 16 open issues and 31 have been closed. On average issues are closed in 90 days. There are 25 open pull requests and 0 closed requests.
  • It has a neutral sentiment in the developer community.
  • The latest version of awesome-cheatsheets is current.
awesome-cheatsheets Support
Best in #Learning
Average in #Learning
awesome-cheatsheets Support
Best in #Learning
Average in #Learning

quality kandi Quality

  • awesome-cheatsheets has 12 bugs (0 blocker, 0 critical, 5 major, 7 minor) and 4 code smells.
awesome-cheatsheets Quality
Best in #Learning
Average in #Learning
awesome-cheatsheets Quality
Best in #Learning
Average in #Learning

securitySecurity

  • awesome-cheatsheets has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
  • awesome-cheatsheets code analysis shows 0 unresolved vulnerabilities.
  • There are 0 security hotspots that need review.
awesome-cheatsheets Security
Best in #Learning
Average in #Learning
awesome-cheatsheets Security
Best in #Learning
Average in #Learning

license License

  • awesome-cheatsheets is licensed under the MIT License. This license is Permissive.
  • Permissive licenses have the least restrictions, and you can use them in most projects.
awesome-cheatsheets License
Best in #Learning
Average in #Learning
awesome-cheatsheets License
Best in #Learning
Average in #Learning

buildReuse

  • awesome-cheatsheets releases are not available. You will need to build from source code and install.
  • awesome-cheatsheets saves you 716 person hours of effort in developing the same functionality from scratch.
  • It has 1655 lines of code, 0 functions and 18 files.
  • It has low code complexity. Code complexity directly impacts maintainability of the code.
awesome-cheatsheets Reuse
Best in #Learning
Average in #Learning
awesome-cheatsheets Reuse
Best in #Learning
Average in #Learning
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awesome-cheatsheets Key Features

👩‍💻👨‍💻 Awesome cheatsheets for popular programming languages, frameworks and development tools. They include everything you should know in one single file.

Community Discussions

Trending Discussions on awesome-cheatsheets
  • Interpret output from bash in Python's subprocess module
Trending Discussions on awesome-cheatsheets

QUESTION

Interpret output from bash in Python's subprocess module

Asked 2018-Dec-25 at 17:26

I have been going through the subprocess module examples on Doug Helmann's PYMOPTW. Here's the code snippet that I have trouble with.

# subprocess_run_output_error.py
import subprocess

try:
    completed = subprocess.run(
        'echo to stdout; echo to stderr 1>&2; exit 1',
        check=True,
        shell=True,
        stdout=subprocess.PIPE,
    )
except subprocess.CalledProcessError as err:
    print('ERROR:', err)
else:
    print('returncode:', completed.returncode)
    print('Have {} bytes in stdout: {!r}'.format(
        len(completed.stdout),
        completed.stdout.decode('utf-8'))
    )

I understand that exit 1 is supposed to throw an error and the except clause is run.

to stderr 
ERROR: Command 'echo to stdout; echo to stderr 1>&2; exit 1' returned non-zero exit status 1.

I don't get why to stdout is not printed but to stderr. Doesn't 1>&2 appear after echo to stdout has been run?

For better understanding, I changed the code to see if I could get the else portion to run so I switched it to exit 0. When I did so, the output that I got was:

to stderr
returncode: 0
Have 10 bytes in stdout: 'to stdout\n'

I don't seem to understand what the 1>2 means despite going to cheatsheets.

  1. Again to stderr was printed. Why isn't to stdout printed out first since it appeared first?

  2. Why is the CompletedProcess object only holding on to to stderr and not to stdout?

  3. If I understand the cheatsheet's portion below, why isn't to stderr sent to the standard error stream if it's file descriptor is 2?

n>&m # file descriptor n is made to be a copy of the output file descriptor

The other question that I found relatively close to this was this. However, it was comparing &> and >&. I couldn't make sense of the initial >& so I felt even more confused.

ANSWER

Answered 2018-Dec-25 at 17:26
  1. Because you captured it, sou you have it available at completed.stdout.
  2. Because you only captured stdout: stdout=subprocess.PIPE, but no stderr=subprocess.PIPE
  3. It is actually sent to stderr, that's why it is printed at the beginning, because you didn't captured it and that stream is unbuffered.

Source https://stackoverflow.com/questions/53924268

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install awesome-cheatsheets

You can download it from GitHub.

Support

You are more than welcome to contribute and build your own cheat sheet for your favorite programming language, framework or development tool. Just submit changes via pull request and I will review them before merging.

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