https://github.com/haarcuba/warp2

access legacy Python 2 code from within Python 3
https://github.com/haarcuba/warp2

compatibility embed-python2-in-python3 legacy-python python python-2 python-3 python2 python3

Last synced: about 1 month ago
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access legacy Python 2 code from within Python 3

• Host: GitHub
• URL: https://github.com/haarcuba/warp2
• Owner: haarcuba
• License: mit
• Created: 2017-06-03T21:23:23.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2017-06-03T23:23:04.000Z (over 7 years ago)
• Last Synced: 2024-09-29T17:03:43.520Z (about 2 months ago)
• Topics: compatibility, embed-python2-in-python3, legacy-python, python, python-2, python-3, python2, python3
• Language: Python
• Homepage: https://haarcuba.github.io/warp2/
• Size: 11.7 KB
• Stars: 13
• Watchers: 4
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Warp 2

Warp 2 wraps Python 2 code and allows access to it by running in in a subprocess.

It communicates with the subprocess using [pickle](https://docs.python.org/3.6/library/pickle.html), so there are limitation to using it - if you need to send unpicklable data, that's a problem.

## Installation

    $ pip install warp2

## Example

here's a Python 2 class of a greeter that tracks a word count:

```python

# this is in Python 2

import collections

class Greeter( object ):

    def __init__( self ):

        self._counts = collections.defaultdict( lambda: 0 )

    def say( self, what ):

        print what

        self._counts[ what ] += 1

        return 'said: {}'.format( what )

    def counts( self ):

        return dict( self._counts )

```

here's how to use it from Python 3, note that you must provide a `thing` object for the Warp 2 library to use:

```python

# this is in Python 3

import warp2.warper

import random

greeter = warp2.warper.Warper( 'import greeter ; thing=greeter.Greeter()' )

for _ in range( 10 ):

    greeting = random.choice( [ 'hi', 'hello', "what's up", 'how are you' ] )

    greeter.say( greeting )

print( "summary: " )

print( greeter.counts() )

```

Here's how to run this example from the root of this project (once warp2 is installed of course)

    $ PYTHONPATH=examples/ python examples/three.py 

    what's up

    hello

    how are you

    what's up

    how are you

    hello

    hi

    how are you

    hi

    what's up

    summary: 

    {'how are you': 3, 'hi': 2, 'hello': 2, "what's up": 3}