Python Table.from_domain方法代碼示例

# 需要導入模塊: from Orange.data.table import Table [as 別名]
# 或者: from Orange.data.table.Table import from_domain [as 別名]
    def received_table_load_votable(self, private_key, sender_id, msg_id, mtype, parameters, extra):
        """
        Read the received VOTable and broadcast.
        """
        print("Call:", private_key, sender_id, msg_id, mtype, parameters, extra)

        # Retrieve and read the VOTable.
        url_table = parameters['url']

        # sys.stdout is redirected by canvas.__main__ via redirect_stdout()
        # in canvas.util.redirect to an
        # Orange.canvas.application.outputview.TextStream object. This
        # has a @queued_blocking flush(), which can result in an "Result not
        # yet ready" RuntimeError from the QueuedCallEvent class.
        # This exception is raised because astropy.io.votable.table uses
        # astropy.utils.xml.iterparser, which uses astropy.utils.data,
        # which uses the Spinner class from astropy.utils.console, which
        # finally uses stdout to output a progress indicator.
        # Orange has its own mechanisms for indicating progress, so it would
        # perhaps be better to try to use that.
        # For now, the Orange redirect of stdout is temporarily disabled
        # while the votable is being parsed.

        stdout_orange = sys.stdout
        sys.stdout = sys.__stdout__
        votable_tree = votable.parse(url_table)
        sys.stdout = stdout_orange

        print("VOTable Tree created")
        votable_table = votable_tree.get_first_table()
        #type(votable)
        #<class 'astropy.io.votable.tree.Table'>
        table = votable_table.to_table()
        #type(table)
        #<class 'astropy.table.table.Table'>
        print("AstroPy table made")



        # This does not allow classes.
        if False:
            # Convert the VOTable to a Domain.
            # TODO: Y en metas
            attributes = [
                ContinuousVariable(name=column)
                for column in table.columns
            ]
            domain = Domain(attributes = attributes)
            print("Domain made")

            # Convert the VOTable to a Table
            # Append the Table to LazyTable self.data.
            # (Re)send self.data).
            # TODO: Use from_domain() implicitly from __init__().
            # TODO: Include support to stop_pulling immediately.
            otable = Table.from_domain(
                #otable = LazyTable.from_domain(
                #otable = LazyTable(
                domain = domain,
                n_rows = len(table),
                #    stop_pulling = True,
            )
            otable.stop_pulling = True
            # TODO: set widget_origin?
            print("Orange Table initialized")
            for i, variable in enumerate(otable.domain.variables):
                otable.X[:,i] = table.columns[variable.name].data

        attributes = [
            ContinuousVariable(name=column)
            for column in table.columns if not 'CLASS' in column
        ]
        class_vars = [
            DiscreteVariable(name=column, values=['alpha', 'beta'])
            for column in table.columns if 'CLASS' in column
        ]
        domain = Domain(
            attributes=attributes,
            class_vars=class_vars,
        )

        otable = Table.from_domain(
            domain = domain,
            n_rows = len(table),
        )
        otable.stop_pulling = True
        print("Orange Table initialized")
        for i, variable in enumerate(otable.domain.attributes):
            otable.X[:,i] = table.columns[variable.name].data
        for i, variable in enumerate(otable.domain.class_vars):
            #otable.Y[:,i] = table.columns[variable.name].data
            #otable.Y[:] = table.columns[variable.name].data
            otable.Y[:] = table.columns[variable.name].data.round()

        print("Orange Table filled")
        if self.data is None:
            self.data = otable
        else:
            self.data.extend(otable)
            # TODO: Why doesn't this work?:
#.........這裏部分代碼省略.........