def method with variable no of parameters file.writeStuff(n, a1, a2,...an)

[vlad_fig]

Hello all,

I would like some help with setting up a method that would allow me to change its number of parameters. For example:

#---------------------
class createfile(object):

def __init__(self,
modelName = None,
someLines = None):

self.modelName = modelName

if someLines is None:
self.someLines = []
else:
self.someLines = someLines

def writeStuff(self,
numberParameters = None,
Parameter1 = None,... ??? )
self.someLines .append("yes, we can %s" % self.Parameter1)
#---------------------
file = createfile('file')

file.writeStuff(2,a1,a2)
file.writeStuff(3,a1,a2,a3)
.....
file.writeStuff(n,a1,a2,...an)

 

[Joaquin Abian]

Hello all,

I would like some help with setting up a method that would allow me to change its number of parameters. For example:

#---------------------
class createfile(object):

def __init__(self,
modelName = None,
someLines = None):

self.modelName = modelName

if someLines is None:
self.someLines = []
else:
self.someLines = someLines

def writeStuff(self,
numberParameters = None,
Parameter1 = None,... ??? )
self.someLines .append("yes, we can %s" % self.Parameter1)
#---------------------
file = createfile('file')

file.writeStuff(2,a1,a2)
file.writeStuff(3,a1,a2,a3)
....
file.writeStuff(n,a1,a2,...an)

---
so i want a method i can call based on the number of parameters n , and that allows me to add these extra parameters based on n

Thank you,
Vicnic

Maybe you are looking for *args:

class Test():
def meth(self, *args):
print args

inst = Test()
inst.meth(1,2,3,4,5,6,7)

#prints (1,2,3,4,5,6,7)

Cheers
Joaquin

 

[alex23]

file.writeStuff(2,a1,a2)
file.writeStuff(3,a1,a2,a3)
....
file.writeStuff(n,a1,a2,...an)

It's not necessary to have to specify the number of parameters, you
can use Python's support for optional parameters[1] instead:

def writeStuff(self, *args):
self.someLines.append(args)

args will be a list of the values passed into writeStuff.

1: http://docs.python.org/reference/expressions.html#calls