Module: RbbtPython

Extended by:
PyCall::Import
Defined in:
lib/rbbt/util/python.rb,
lib/rbbt/util/python/util.rb

Defined Under Namespace

Classes: Binding, RbbtPythonException

Class Method Summary collapse

Class Method Details

.add_path(path) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 24

def self.add_path(path)
  begin
    self.run 'sys' do
      sys.path.append path
    end
  rescue
    raise RbbtPythonException, 
      "Could not add path #{Misc.fingerprint path} to python sys: " + $!.message
  end
end

.add_paths(paths) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 35

def self.add_paths(paths)
  self.run 'sys' do
    paths.each do |path|
      sys.path.append path
    end
  end
end

.binding_run(binding = nil, *args, &block) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 207

def self.binding_run(binding = nil, *args, &block)
  binding = new_binding
  binding.instance_exec *args, &block
end

.call_method(module_name, method_name, *args) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 57

def self.call_method(module_name, method_name, *args)
  RbbtPython.import_method(module_name, method_name).call(*args)
end

.class_new_obj(module_name, class_name, args = {}) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 67

def self.class_new_obj(module_name, class_name, args={})
  RbbtPython.get_class(module_name, class_name).new(**args)
end

.collect(iterator, options = {}, &block) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 146

def self.collect(iterator, options = {}, &block)
  acc = []
  self.iterate(iterator, options) do |elem|
    res = block.call elem
    acc << res
  end
  acc
end

.df2tsv(tuple, options = {}) ⇒ Object 



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# File 'lib/rbbt/util/python/util.rb', line 20

def self.df2tsv(tuple, options = {})
  options = Misc.add_defaults options, :type => :list
  IndiferentHash.setup options
  tsv = TSV.setup({}, options)
  tsv.key_field = options[:key_field] || tuple.columns.name
  tsv.fields = py2ruby_a(tuple.columns.values)
  keys = tuple.index.values
  PyCall.len(tuple.index).times do |i|
    k = keys[i]
    tsv[k] = py2ruby_a(tuple.values[i])
  end
  tsv
end

.exec(script) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 71

def self.exec(script)
  PyCall.exec(script)
end

.get_class(module_name, class_name) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 61

def self.get_class(module_name, class_name)
  save_module_name = module_name.to_s.gsub(".", "_")
  RbbtPython.pyimport(module_name, as: save_module_name)
  RbbtPython.send(save_module_name).send(class_name)
end

.import_method(module_name, method_name, as = nil) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 52

def self.import_method(module_name, method_name, as = nil)
  RbbtPython.pyfrom module_name, import: method_name
  RbbtPython.method(method_name)
end

.init_rbbt ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 43

def self.init_rbbt
  if ! defined?(@@__init_rbbt_python) || ! @@__init_rbbt_python
    Log.debug "Loading python 'rbbt' module into pycall RbbtPython module"
    RbbtPython.add_paths(Rbbt.python.find_all)
    RbbtPython.pyimport("rbbt")
    @@__init_rbbt_python = true
  end
end

.iterate(iterator, options = {}, &block) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 107

def self.iterate(iterator, options = {}, &block)
  if ! iterator.respond_to?(:__next__)
    if iterator.respond_to?(:__iter__)
      iterator = iterator.__iter__
    else
      return iterate_index(iterator, options, &block)
    end
  end

  bar = options[:bar]

  case bar
  when TrueClass
    bar = Log::ProgressBar.new nil, :desc => "RbbtPython iterate"
  when String
    bar = Log::ProgressBar.new nil, :desc => bar
  end

  while true
    begin
      elem = iterator.__next__
      yield elem
      bar.tick if bar
    rescue PyCall::PyError
      if $!.type.to_s == "<class 'StopIteration'>"
        break
      else
        raise $!
      end
    rescue
      bar.error if bar
      raise $!
    end
  end

  Log::ProgressBar.remove_bar bar if bar
  nil
end

.iterate_index(elem, options = {}) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 75

def self.iterate_index(elem, options = {})
  iii :interate_index
  bar = options[:bar]

  len = PyCall.len(elem)
  case bar
  when TrueClass
    bar = Log::ProgressBar.new nil, :desc => "RbbtPython iterate"
  when String
    bar = Log::ProgressBar.new nil, :desc => bar
  end

  len.times do |i|
    begin
      yield elem[i]
      bar.tick if bar
    rescue PyCall::PyError
      if $!.type.to_s == "<class 'StopIteration'>"
        break
      else
        raise $!
      end
    rescue
      bar.error if bar
      raise $!
    end
  end

  Log::ProgressBar.remove_bar bar if bar
  nil
end

.list2ruby(list) ⇒ Object 



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# File 'lib/rbbt/util/python/util.rb', line 34

def self.list2ruby(list)
  return list unless PyCall::List === list 
  list.collect do |e|
    list2ruby(e)
  end
end

.new_binding ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 203

def self.new_binding
  Binding.new
end

.numpy2ruby(numpy) ⇒ Object 



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# File 'lib/rbbt/util/python/util.rb', line 41

def self.numpy2ruby(numpy)
  list2ruby(numpy.tolist)
end

.obj2hash(obj) ⇒ Object 



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# File 'lib/rbbt/util/python/util.rb', line 45

def self.obj2hash(obj)
  hash = {}
  RbbtPython.iterate obj.keys do |k|
    hash[k] = obj[k]
  end
  hash
end

.py2ruby_a(array) ⇒ Object Also known as: to_a 



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# File 'lib/rbbt/util/python/util.rb', line 2

def self.py2ruby_a(array)
  PyCall::List.(array).to_a
end

.run(mod = nil, imports = nil, &block) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 155

def self.run(mod = nil, imports = nil, &block)
  if mod
    if Hash === imports
      pyimport mod, **imports
    elsif imports.nil?
      pyimport mod 
    else
      pyfrom mod, :import => imports
    end
  end

  module_eval(&block)
end

.run_log(mod = nil, imports = nil, severity = 0, severity_err = nil, &block) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 169

def self.run_log(mod = nil, imports = nil, severity = 0, severity_err = nil, &block)
  if mod
    if imports == "*" || imports == ["*"]
      pyfrom mod
    elsif Array === imports
      pyfrom mod, :import => imports
    elsif Hash === imports
      pyimport mod, imports
    else
      pyimport mod 
    end
  end

  Log.trap_std("Python STDOUT", "Python STDERR", severity, severity_err) do
    module_eval(&block)
  end
end

.run_log_stderr(mod = nil, imports = nil, severity = 0, &block) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 187

def self.run_log_stderr(mod = nil, imports = nil, severity = 0, &block)
  if mod
    if Array === imports
      pyfrom mod, :import => imports
    elsif Hash === imports
      pyimport mod, imports
    else
      pyimport mod 
    end
  end

  Log.trap_stderr("Python STDERR", severity) do
    module_eval(&block)
  end
end

.script(text, options = {}) ⇒ Object 



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# File 'lib/rbbt/util/python.rb', line 18

def self.script(text, options = {})
  Log.debug "Running python script:\n#{text.dup}"
  text = StringIO.new text unless IO === text
  CMD.cmd_log(:python, options.merge(:in => text))
end

.tsv2df(tsv) ⇒ Object 



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# File 'lib/rbbt/util/python/util.rb', line 11

def self.tsv2df(tsv)
  df = nil
  RbbtPython.run 'pandas' do
    df = pandas.DataFrame.new(tsv.values, columns: tsv.fields, index: tsv.keys)
    df.columns.name = tsv.key_field
  end
  df
end