如何替换实例中的方法。 [英] How to replace a method in an instance.
问题描述
在下面的程序中，我希望这个实例在调用inst.m1时最终调用repmeth
。就像现在一样，我收到这个错误：
来自init的Hello
inst =< __ main__.CC实例位于0x402105ec>
Traceback（最近一次调用最后一次）：
文件" ./ foo9.py"，第17行，在？
inst.m1（）
TypeError：repmeth（）只需1个参数（0给定）
＃！ / usr / bin / python
def repmeth（self）：
print" repmeth"
class CC：
def __init __（自我）：
self.m1 = repmeth
打印''来自初学者''
def m1（个体经营）：
打印" m1"
inst = CC（）
inst.m1 （）
TIA
-
时间过得很快。果蝇像香蕉一样苍蝇。奇怪的事情有.0。
发生但没有比这更奇怪。你的驾驶执照是否说器官..0
捐助者？黑洞是上帝除以零的地方。听我说！我们全都是个人b $ b！如果这不是一个假设的问题怎么办？
steveo在syslang.net
8月24日，11： 02日上午，Steven W. Orr < ste ... @syslang.netwrote：
在下面的程序中，我希望这个实例最终每次调用repmeth
调用inst.m1。就像现在一样，我收到这个错误：
来自init的Hello
inst =< __ main__.CC实例位于0x402105ec>
Traceback（最近一次调用最后一次）：
文件" ./ foo9.py"，第17行，在？
inst.m1（）
TypeError：repmeth（）只需1个参数（0给定）
＃！ / usr / bin / python
def repmeth（self）：
print" repmeth"
class CC：
def __init __（自我）：
self.m1 = repmeth
打印''来自初学者''
def m1（个体经营）：
打印" m1"
inst = CC（）
inst.m1 （）
TIA
-
时间过得很快。果蝇像香蕉一样苍蝇。奇怪的事情有.0。
发生但没有比这更奇怪。你的驾驶执照是否说器官..0
捐助者？黑洞是上帝除以零的地方。听我说！我们全都是个人b $ b！如果这不是一个假设的问题怎么办？
steveo at syslang.net
删除self来自repmeth，因为它在函数中不是必需的，只在一个类中定义的
函数中。当然，
类中的函数也被认为是一种方法。
Mike
2007年8月24日星期五09：12-0700， ky******@gmail.com ：
=> 8月24日上午11:02，Steven W. Orr < ste ... @syslang.netwrote：
=>在下面的程序中，我希望这个实例最终调用repmeth
=>每当inst。调用m1。就像现在一样，我收到这个错误：
=>>
=>来自init的Hello
=> inst = < __ main__.CC实例位于0x402105ec>
=> Traceback（最近一次调用最后一次）：
=>文件./ foo9.py，第17行，在？
=> inst.m1（）
=> TypeError：repmeth（）只取1个参数（0给定）
=>>
=>＃！ / usr / bin / python
=> def repmeth（self）：
=> print" repmeth"
=>>
=>类CC：
=> def __init __（self）：
=> self.m1 = repmeth
=> print''Hello from init''
=>>
=> def m1（个体经营）：
=> print" m1"
=>>
=> inst = CC（）
=> inst.m1（）
=>删除自我来自repmeth，因为它在函数中不是必需的，只在
=>类中定义的函数中。当然，
=>类中的函数也被认为是一种方法。
对不起。我需要代表自动传递给它，如果它被调用了
。我不是故意通过不提供参考来代价来模糊这个问题。
我清楚了吗？
-
时间过得很快。果蝇像香蕉一样苍蝇。奇怪的事情有.0。
发生但没有比这更奇怪。你的驾驶执照是否说器官..0
捐助者？黑洞是上帝除以零的地方。听我说！我们全都是个人b $ b！如果这不是一个假设的问题怎么办？
steveo at syslang.net
Steven W. Orr写道：
对不起。我需要代表自动传递给它，如果它被调用了
。我不是故意通过不提供参考来代价来模糊这个问题。
我清楚了吗？
排序。如果你陈述你想要达到的目标，也许你会更好，
而不是你认为你应该怎么做。你可能不需要在__init__中替换一个方法，但是还有另一种不那么棘手的方法。
/ W
In the program below, I want this instance to end up calling repmeth
whenever inst.m1 is called. As it is now, I get this error:
Hello from init
inst = <__main__.CC instance at 0x402105ec>
Traceback (most recent call last):
File "./foo9.py", line 17, in ?
inst.m1()
TypeError: repmeth() takes exactly 1 argument (0 given)
#! /usr/bin/python
def repmeth( self ):
print "repmeth"
class CC:
def __init__( self ):
self.m1 = repmeth
print ''Hello from init''
def m1 ( self ):
print "m1"
inst = CC()
inst.m1()
TIA
--
Time flies like the wind. Fruit flies like a banana. Stranger things have .0.
happened but none stranger than this. Does your driver''s license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren''t a hypothetical question?
steveo at syslang.net
On Aug 24, 11:02 am, "Steven W. Orr" <ste...@syslang.netwrote:In the program below, I want this instance to end up calling repmeth
whenever inst.m1 is called. As it is now, I get this error:
Hello from init
inst = <__main__.CC instance at 0x402105ec>
Traceback (most recent call last):
File "./foo9.py", line 17, in ?
inst.m1()
TypeError: repmeth() takes exactly 1 argument (0 given)
#! /usr/bin/python
def repmeth( self ):
print "repmeth"
class CC:
def __init__( self ):
self.m1 = repmeth
print ''Hello from init''
def m1 ( self ):
print "m1"
inst = CC()
inst.m1()
TIA
--
Time flies like the wind. Fruit flies like a banana. Stranger things have .0.
happened but none stranger than this. Does your driver''s license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren''t a hypothetical question?
steveo at syslang.netRemove "self" from repmeth as it''s not required in a function, only in
functions that are defined within a class. Of course, a function in a
class is also know as a method.
Mike
On Friday, Aug 24th 2007 at 09:12 -0700, quoth ky******@gmail.com:
=>On Aug 24, 11:02 am, "Steven W. Orr" <ste...@syslang.netwrote:
=>In the program below, I want this instance to end up calling repmeth
=>whenever inst.m1 is called. As it is now, I get this error:
=>>
=>Hello from init
=>inst = <__main__.CC instance at 0x402105ec>
=>Traceback (most recent call last):
=> File "./foo9.py", line 17, in ?
=> inst.m1()
=>TypeError: repmeth() takes exactly 1 argument (0 given)
=>>
=>#! /usr/bin/python
=>def repmeth( self ):
=> print "repmeth"
=>>
=>class CC:
=> def __init__( self ):
=> self.m1 = repmeth
=> print ''Hello from init''
=>>
=> def m1 ( self ):
=> print "m1"
=>>
=>inst = CC()
=>inst.m1()
=>Remove "self" from repmeth as it''s not required in a function, only in
=>functions that are defined within a class. Of course, a function in a
=>class is also know as a method.
Sorry. I need repmeth to have self passed to it automatically if it''s
called. I didn''t mean to obfuscate the problem by not making a reference
to self in repmeth.
Am I being clear?
--
Time flies like the wind. Fruit flies like a banana. Stranger things have .0.
happened but none stranger than this. Does your driver''s license say Organ ..0
Donor?Black holes are where God divided by zero. Listen to me! We are all- 000
individuals! What if this weren''t a hypothetical question?
steveo at syslang.net
Steven W. Orr wrote:Sorry. I need repmeth to have self passed to it automatically if it''s
called. I didn''t mean to obfuscate the problem by not making a reference
to self in repmeth.
Am I being clear?
Sort of. Maybe you fare better if you state what you want to achieve,
instead of how you think you should do it. Chances are you don''t need to
replace a method in __init__, but there''s another, less tricky way.
/W
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