I have a list...

[Damir Hakimov]

Hi, All!

say, i have a function:

def f(*b):
print b
return

then i do:
f(3,4,5)
(3, 4, 5)

but i have list f=(3,4,5)
f(l)
((3, 4, 5),)

how can i call f function to result
f(???(b))
(3, 4, 5)

Thanks!

 

[Albert Hofkamp]

Hi, All!

say, i have a function:

def f(*b):
print b
return

then i do:
f(3,4,5)
(3, 4, 5)

but i have list f=(3,4,5)
f(l)
((3, 4, 5),)

how can i call f function to result
f(???(b))
(3, 4, 5)

You mean apply(f,(3,4,5)) ?


Albert

 

[user]

Hi, All!

say, i have a function:

def f(*b):
print b
return

then i do:
f(3,4,5)
(3, 4, 5)

but i have list f=(3,4,5)
f(l)
((3, 4, 5),)

how can i call f function to result
f(???(b))
(3, 4, 5)

Thanks!

You can use the keyword 'type' to check the type of your arguments
and return the appropriate 'format' according to the their types

Regards

Salvatore

 

[Dialtone]

say, i have a function:

def f(*b):
print b
return

then i do:
f(3,4,5)
(3, 4, 5)

This is not a list but a tuple.

but i have list f=(3,4,5)
f(l)
((3, 4, 5),)

The standard way to represent a tuple with one element is to put a coma
after that element like ("donald",)

how can i call f function to result
f(???(b))
(3, 4, 5)

If you want this you should use a list which has square brackets [].

But the arguments passed with *b are incapsuleted into a tuple so you should
print something like this:
.... print b[0]

f([1,2,3])

[1, 2, 3]

 

[Duncan Booth]

Hi, All!

say, i have a function:

def f(*b):
print b
return

then i do:
f(3,4,5)
(3, 4, 5)

but i have list f=(3,4,5)
f(l)
((3, 4, 5),)

how can i call f function to result
f(???(b))
(3, 4, 5)

I'm not sure any of the other responses actually answered the question,
which I think was meant to be, given a tuple l=3,4,5 how do you pass that
tuple to the function f so that b simply gets the tuple. The answer is that
you try:
(3,4,5)

If that doesn't work, then you upgrade to a more recent version of Python.
If you (or your users) really can't upgrade you should use 'apply'.

 

[Aahz]

[...]

....it never will be missed.

 

[Bengt Richter]

Hi, All!

say, i have a function:

def f(*b):
print b
return

then i do:
f(3,4,5)
(3, 4, 5)

but i have list f=(3,4,5)
f(l)
((3, 4, 5),)

how can i call f function to result
f(???(b))
(3, 4, 5)

Is this what you are looking for? :
... print b
... ((1, 2, 3),)

tup was single arg, but:
(1, 2, 3)

tup got unpacked to make args

>>> L = [4,5,6]
>>> f(L)

([4, 5, 6],)

L was single arg, but:
(4, 5, 6)

L got unpacked similarly, but note that args become tuple b, not a list.

Regards,
Bengt Richter