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Add initial values to variables to avoid crash in __del__

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This commit is contained in:
Guido van Rossum 1996-09-05 16:45:49 +00:00
parent 932c06e4ff
commit e1a7a3b3b3
2 changed files with 12 additions and 0 deletions
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6
Lib/lib-tk/Tkinter.py
View file

@ -76,6 +76,7 @@ def _exit(code='0'):
_varnum = 0
class Variable:
_default = ""
def __init__(self, master=None):
global _default_root
global _varnum
@ -85,6 +86,7 @@ def __init__(self, master=None):
self._tk = _default_root.tk
self._name = 'PY_VAR' + `_varnum`
_varnum = _varnum + 1
self.set(self._default)
def __del__(self):
self._tk.globalunsetvar(self._name)
def __str__(self):
@ -93,24 +95,28 @@ def set(self, value):
return self._tk.globalsetvar(self._name, value)
class StringVar(Variable):
_default = ""
def __init__(self, master=None):
Variable.__init__(self, master)
def get(self):
return self._tk.globalgetvar(self._name)
class IntVar(Variable):
_default = "0"
def __init__(self, master=None):
Variable.__init__(self, master)
def get(self):
return self._tk.getint(self._tk.globalgetvar(self._name))
class DoubleVar(Variable):
_default = "0.0"
def __init__(self, master=None):
Variable.__init__(self, master)
def get(self):
return self._tk.getdouble(self._tk.globalgetvar(self._name))
class BooleanVar(Variable):
_default = "false"
def __init__(self, master=None):
Variable.__init__(self, master)
def get(self):

6
Lib/tkinter/Tkinter.py
View file

@ -76,6 +76,7 @@ def _exit(code='0'):
_varnum = 0
class Variable:
_default = ""
def __init__(self, master=None):
global _default_root
global _varnum
@ -85,6 +86,7 @@ def __init__(self, master=None):
self._tk = _default_root.tk
self._name = 'PY_VAR' + `_varnum`
_varnum = _varnum + 1
self.set(self._default)
def __del__(self):
self._tk.globalunsetvar(self._name)
def __str__(self):
@ -93,24 +95,28 @@ def set(self, value):
return self._tk.globalsetvar(self._name, value)
class StringVar(Variable):
_default = ""
def __init__(self, master=None):
Variable.__init__(self, master)
def get(self):
return self._tk.globalgetvar(self._name)
class IntVar(Variable):
_default = "0"
def __init__(self, master=None):
Variable.__init__(self, master)
def get(self):
return self._tk.getint(self._tk.globalgetvar(self._name))
class DoubleVar(Variable):
_default = "0.0"
def __init__(self, master=None):
Variable.__init__(self, master)
def get(self):
return self._tk.getdouble(self._tk.globalgetvar(self._name))
class BooleanVar(Variable):
_default = "false"
def __init__(self, master=None):
Variable.__init__(self, master)
def get(self):