Class DoubleVar

Lib/tkinter/__init__.py:618–636

Value holder for float variables.

class DoubleVar(Variable):
    """Value holder for float variables."""
    _default = 0.0

    def __init__(self, master=None, value=None, name=None):
        """Construct a float variable.

        MASTER can be given as master widget.
        VALUE is an optional value (defaults to 0.0)
        NAME is an optional Tcl name (defaults to PY_VARnum).

        If NAME matches an existing variable and VALUE is omitted
        then the existing value is retained.
        """
        Variable.__init__(self, master, value, name)

    def get(self):
        """Return the value of the variable as a float."""
        return self._tk.getdouble(self._tk.globalgetvar(self._name))


class BooleanVar(Variable):