Re: Constructor class problem

[Joal Heagney]

Diez B. Roggisch wrote:
Wolfgang wrote:

Hi,
I am a newbie and have to modify some python moduls.
I get the followin error:
TypeError: __init__() takes exactly 3 arguments (2 given)
Here the code snippet:
class gXconv:
   def __init__(self, pathValue):
   self.pathValue=pathValue
   self.__sections = {}
   self.__spalten = {}
   self.labelfiles=[]
etc.
call:
   try:
   gx=gXconv.gXconv(gXconfPath)
   except gXconv.gXconvertError, msg:
   print msg
   sys.exit(1)

That error can't appear in the above code - is the line in the stacktrace
amongst the shown ones? I doubt it. 

The error means that you tried to call a function with less arguments than
it expected. As in __init__ the first argument is implicit on creation of
an object, the above errormessage indicates that there is an __init__
of the form
class Foo:
def __init__(self, arg1, arg2)
   pass
called like this
Foo("bar")
But as the only constructor you show _has_ only one additional argument
besides self and line 

gx=gXconv.gXconv(gXconfPath)
shows that you called it properly, the error must come from somewhere else.
And the easiest way to track it down is to add some temporary
print "I am in ."
debug messages through your code.
By looking at which messages pop up, you can trace what happens just 
before your program bombs.

Joal
--
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Re: Constructor class problem

[Diez B. Roggisch]

Wolfgang wrote:

> Hi,
> I am a newbie and have to modify some python moduls.
> I get the followin error:
> TypeError: __init__() takes exactly 3 arguments (2 given)
> 
> Here the code snippet:
> class gXconv:
> def __init__(self, pathValue):
> self.pathValue=pathValue
> self.__sections = {}
> self.__spalten = {}
> self.labelfiles=[]
> etc.
> 
> call:
> try:
> gx=gXconv.gXconv(gXconfPath)
> except gXconv.gXconvertError, msg:
> print msg
> sys.exit(1)


That error can't appear in the above code - is the line in the stacktrace
amongst the shown ones? I doubt it. 

The error means that you tried to call a function with less arguments than
it expected. As in __init__ the first argument is implicit on creation of
an object, the above errormessage indicates that there is an __init__
of the form

class Foo:
def __init__(self, arg1, arg2)
   pass

called like this

Foo("bar")

But as the only constructor you show _has_ only one additional argument
besides self and line 

gx=gXconv.gXconv(gXconfPath)

shows that you called it properly, the error must come from somewhere else.

-- 
Regards,

Diez B. Roggisch
-- 
http://mail.python.org/mailman/listinfo/python-list

Constructor class problem

[Wolfgang]

Hi,
I am a newbie and have to modify some python moduls.
I get the followin error:
TypeError: __init__() takes exactly 3 arguments (2 given)

Here the code snippet:
class gXconv:
def __init__(self, pathValue):
self.pathValue=pathValue
self.__sections = {}
self.__spalten = {}
self.labelfiles=[]
etc.

call:
try:
gx=gXconv.gXconv(gXconfPath)
except gXconv.gXconvertError, msg: 
print msg
sys.exit(1)

Hoping for hints.
Wolfgang
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