backquotes
Introduction
backquotes brings (Perl / Ruby)’s shell invocation syntax to Python.
Since backquotes is an experimental module, using it in a serious program is not recommended.
Syntax
Firstly, do not forget to import backquotes module.
import backquotesBasic
You can use similar syntax to Perl / Ruby.
import backquotes
print(`date`)Pipes and redirections
Yes, you can use pipes, redirections too.
import backquotes
print(`ls | tr [a-z] [A-Z]`.splitlines())Local variables substitution
To bring local variables in Python code to shell command, use Perl-like variables substitution.
import backquotes
spam = 'spam'
print(`echo $spam`)$$ is replaced with a literal $.
import backquotes
print(`echo $$PATH`)Usage
Runtime-preprocessing
You can use runtime-preprocessing only in Python 2. This works transparently whenever you import backquotes.
#!/usr/bin/env python
import backquotes
print(`date`)Save the above code as date.py, and run it as usual.
python date.pyYou will see the result of date command.
Runtime-preprocessing sometimes causes SyntaxError before preprocessing starts, especially with complex commands invocation. You can avoid this error by using single-quotes just inside the backquotes.
print(`'for file in *; do echo $file; done'`)Execute backquotes module
Run python with -m backquotes option to invoke backquotes as a script. backquotes compiles a plain Python code and execute it.
python -m backquotes date.pyYou can pass arguments to the script like this.
python -m backquotes date.py 2015 10 31Preprocess Python code
Run python with -m backquotes -E option to only preprocess the given source file and print the result to stdout.
mkdir dist
python -m backquotes -E date.py > dist/date.py
python dist/date.pyRestrictions
backquotes does not work in Python REPL. Importing it in REPL causes warnings.
A module which imports backquotes does not work when it is imported by another module.
Install
pip install backquotesor
git clone https://github.com/manicmaniac/backquotes.git
cd backquotes
python setup.py installor
wget https://raw.githubusercontent.com/manicmaniac/backquotes/master/backquotes.py1 maintainer
Metadata
1 maintainer
Release files for backquotes 0.1.0
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Source distribution (sdist)
| File | Size | Uploaded | Provenance | Actions |
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| backquotes-0.1.0.tar.gz | 8.6 kB | Without provenance | Details for backquotes-0.1.0.tar.gz |
Release files / backquotes-0.1.0.tar.gz
| Download URL | backquotes-0.1.0.tar.gz |
|---|---|
| Size | 8.6 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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twine/1.15.0 pkginfo/1.8.2 requests/2.27.1 setuptools/44.1.1 requests-toolbelt/0.9.1 tqdm/4.62.3 CPython/2.7.18
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Security for backquotes 0.1.0
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