Question :
My problem is I have values in a list. And I want to separate these values and send them as a separate parameter.
My code is:
def egg():
return "egg"
def egg2(arg1, arg2):
print arg1
print arg2
argList = ["egg1", "egg2"]
arg = ', '.join(argList)
egg2(arg.split())
This line of code (egg2(arg.split())) does not work, but I wanted to know if it is possible to call some built-in function that will separated values from list and thus later we can send them as two different parameters. Similar to egg2(argList[0], argList[1]), but to be done dynamically, so that I do no have to type explicitly list arguments.
Answer #1:
>>> argList = ["egg1", "egg2"]
>>> egg2(*argList)
egg1
egg2
You can use *args (arguments) and **kwargs (for keyword arguments) when calling a function.
Have a look at this blog on how to use it properly.
Answer #3:
arg.split() does not split the list the way you want because the default separator does not match yours:
In [3]: arg
Out[3]: 'egg1, egg2'
In [4]: arg.split()
Out[4]: ['egg1,', 'egg2']
In [5]: arg.split(', ')
Out[5]: ['egg1', 'egg2']
From the docs (emphasis added):
If sep is not specified or is
None, a different splitting algorithm is applied: runs of consecutive whitespace are regarded as a single separator, and the result will contain no empty strings at the start or end if the string has leading or trailing whitespace.
Answer #4:
There are maybe better ways, but you can do:
argList = ["egg1", "egg2"]
(a, b) = tuple(argList)
egg2(a, b)
