Variable

tkinter

class

Variable(master=None, value=None, name=None)

The base class for the Tk variable wrappers. A Tk variable is a value stored in the Tcl interpreter that can be linked to widgets through their variable or textvariable options (see Coupling widget variables), so that changes propagate both ways: updating the variable updates every widget bound to it, and a user editing such a widget updates the variable.

Changed in 3.10

3.10: Two variables now compare equal (==) only when they have the same name, are of the same class, and belong to the same Tcl interpreter.

Members of Variable

g

get: Return the current value of the variable.

i

initialize: Set the variable to value.

s

set: Set the variable to value.

t

trace: Register callback to be called when the variable is accessed according to mode.
trace_add: Register callback to be called when the variable is accessed according to mode.
trace_info: Return a list of (modes, cbname) pairs describing all traces currently set on the variable, where modes is a tuple of mode strings and cbname is the internal callback name.
trace_remove: Remove a trace callback from the variable.
trace_variable: Register callback to be called when the variable is accessed according to mode.
trace_vdelete: Remove the trace callback named cbname registered for mode with trace_variable().
trace_vinfo: Return a list of (mode, cbname) pairs for all traces set on the variable with trace_variable().

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Graphical user interfaces with Tk

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Graphical user interfaces with Tk

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Variable

tkinter

Members of Variable

g

i

s

t

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