Ruby.py

Ruby wrapper for Python modules (based on the (PyCall gem)[https://rubygems.org/gems/pycall]).

Installation

Add this line to your application's Gemfile:

gem 'ruby.py'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ruby.py

Usage

require 'ruby.py'

string = RubyPy.import('string')
string.Formatter.new.format('The sum of 1 + 2 is {0}', 3)
#=> 'The sum of 1 + 2 is 3'
string.Template.new('$subject $object $verb')
      .substitute(subject: 'S', object: 'O', verb: 'V')
#=> 'S O V'
string.capwords('this is a test')
#=> 'This Is A Test'

re = RubyPy.import('re')
m = re.match('(\w+) (\w+)', 'Isaac Newton, physicist')
m.group(0)    #=> 'Isaac Newton'
m.group(1)    #=> 'Isaac'
m.group(2)    #=> 'Newton'
m.group(1, 2) #=> PyCall::Tuple.new('Isaac', 'Newton')

cv2 = RubyPy.import('cv2')
cv2.imread('example.png')

np = RubyPy.import('numpy')
a = np.arange(15).reshape(3, 5)
a.shape.inspect #=> '(3, 5)'
a.ndim          #=> 2
a.dtype.name    #=> 'int64'
a.itemsize      #=> 8
a.size          #=> 15

tf = RubyPy.import('tensorflow')
sess   = tf.Session.new
a      = tf.placeholder tf.int16
b      = tf.placeholder tf.int16
add    = tf.add(a, b)
mul    = tf.multiply(a, b)
result = sess.run(add, feed_dict: { a => 2, b => 3 })

Support

Open an issue via GitLab or email ruby.py@fjc-group.com.

Contributing

gitlab.com:fjc/ruby.py

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To test with an arbitrary version of pycall set the environment variable RUBYPY_PYCALL to specify the version and re-bundle. E.g.

$ export RUBYPY_PYCALL="1.1.0.rc1"
$ bundle install
$ bundle exec rake spec

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in ruby.py.gemspec, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

License

The gem is available as open source under the terms of the MIT License.