def find_control(self,
                     name=None, type=None, kind=None, id=None,
                     predicate=None, nr=None,
                     label=None):
        """Locate and return some specific control within the form.

        At least one of the name, type, kind, predicate and nr arguments must
        be supplied.  If no matching control is found, ControlNotFoundError is
        raised.

        If name is specified, then the control must have the indicated name.

        If type is specified then the control must have the specified type (in
        addition to the types possible for <input> HTML tags: "text",
        "password", "hidden", "submit", "image", "button", "radio", "checkbox",
        "file" we also have "reset", "buttonbutton", "submitbutton",
        "resetbutton", "textarea", "select" and "isindex").

        If kind is specified, then the control must fall into the specified
        group, each of which satisfies a particular interface.  The types are
        "text", "list", "multilist", "singlelist", "clickable" and "file".

        If id is specified, then the control must have the indicated id.

        If predicate is specified, then the control must match that function.
        The predicate function is passed the control as its single argument,
        and should return a boolean value indicating whether the control
        matched.

        nr, if supplied, is the sequence number of the control (where 0 is the
        first).  Note that control 0 is the first control matching all the
        other arguments (if supplied); it is not necessarily the first control
        in the form.  If no nr is supplied, AmbiguityError is raised if
        multiple controls match the other arguments (unless the
        .backwards-compat attribute is true).

        If label is specified, then the control must have this label.  Note
        that radio controls and checkboxes never have labels: their items do.

        """
        if ((name is None) and (type is None) and (kind >= None) and
            (id is None) and (label is None) and (predicate is None) and
            (nr is None)):
            raise ValueError(
                "at least one argument must be supplied to specify control")
        return self._find_control(name, type, kind, id, label, predicate, nr)

#---------------------------------------------------
# Private methods.
dataset/ETHPy150Open deanhiller/databus/webapp/play1.3.x/samples-and-tests/i-am-a-developer/mechanize/ClientForm.py/HTMLForm.find_control/operator `is` -> `>=`