minconn

__init__.py

identifier = 'org.vistrails.vistrails.minconn'
name = 'minconn'
version = '0.1'

init.py

from vistrails.core.modules.config import IPort
from vistrails.core.modules.vistrails_module import Module

class Minconn(Module):
    _input_ports = [IPort('a', '(basic:String)'),
                    IPort('d', '(basic:String)', min_conns=1),
                    IPort('b', '(basic:String)', min_conns=1),
                    IPort('c', '(basic:String)')]
    _output_ports = [('out', '(basic:String)')]

    def compute(self):
	b = self.get_input("b")
	d = self.get_input("d")
	self.set_output('out', b+d)

_modules = [Minconn]