capybara/virtualenv/lib/python2.7/site-packages/jinja2/compiler.py
def visit_FromImport(self, node, frame):
        """Visit named imports."""
        self.newline(node)
        self.write('included_template = environment.get_template(')
        self.visit(node.template, frame)
        self.write(', %r).' % self.name)
        if node.with_context:
            self.write('make_module(context.parent, True)')
        else:
            self.write('module')

        var_names = []
        discarded_names = []
        for name in node.names:
            if isinstance(name, tuple):
                name, alias = name
            else:
                alias = name
            self.writeline('l_%s = getattr(included_template, '
                           '%r, missing)' % (alias, name))
            self.writeline('if l_%s is missing:' % alias)
            self.indent()
            self.writeline('l_%s = environment.undefined(%r %% '
                           'included_template.__name__, '
                           'name=%r)' %
                           (alias, 'the template %%r (imported on %s) does '
                           'not export the requested name %s' % (
                                self.position(node),
                                repr(name)
                           ), name))
            self.outdent()
            if frame.toplevel:
                var_names.append(alias)
                if not alias.startswith('_'):
                    discarded_names.append(alias)
            frame.assigned_names.add(alias)

        if var_names:
            if len(var_names) == 1:
                name = var_names[0]
                self.writeline('context.vars[%r] = l_%s' % (name, name))
            else:
                self.writeline('context.vars.update({%s})' % ', '.join(
                    '%r: l_%s' % (name, name) for name in var_names
                ))
        if discarded_names:
            if len(discarded_names) == 1:
                self.writeline('context.exported_vars.discard(%r)' %
                               discarded_names[0])
            else:
                self.writeline('context.exported_vars.difference_'
                               'update((%s))' % ', '.join(imap(repr, discarded_names)))
def visit_FromImport(self, node, frame):
        """Visit named imports."""
        self.newline(node)
        self.write('included_template = environment.get_template(')
        self.visit(node.template, frame)
        self.write(', %r).' % self.name)
        if node.with_context:
            self.write('make_module(context.parent, True)')
        else:
            self.write('module')

        var_names = []
        discarded_names = []
        for name in node.names:
            if isinstance(name, tuple):
                name, alias = name
            else:
                alias = name
            self.writeline('l_%s = getattr(included_template, '
                           '%r, missing)' % (alias, name))
            self.writeline('if l_%s is missing:' % alias)
            self.indent()
            self.writeline('l_%s = environment.undefined(%r %% '
                           'included_template.__name__, '
                           'name=%r)' %
                           (alias, 'the template %%r (imported on %s) does '
                           'not export the requested name %s' % (
                                self.position(node),
                                repr(name)
                           ), name))
            self.outdent()
            if frame.toplevel:
                var_names.append(alias)
                if not alias.startswith('_'):
                    discarded_names.append(alias)
            frame.assigned_names.add(alias)

        if var_names:
            if len(var_names) == 1:
                name = var_names[0]
                self.writeline('context.vars[%r] = l_%s' % (name, name))
            else:
                self.writeline('context.vars.update({%s})' % ', '.join(
                    '%r: l_%s' % (name, name) for name in var_names
                ))
        if discarded_names:
            if len(discarded_names) == 1:
                self.writeline('context.exported_vars.discard(%r)' %
                               discarded_names[0])
            else:
                self.writeline('context.exported_vars.difference_'
                               'update((%s))' % ', '.join(imap(repr, discarded_names)))
Visit named imports.