Jojo Mwebaze wrote:
Hi There,
i would like to implement the following in lists
assuming
x = 3
y = 4
z = None
i want to create a dynamic list such that
mylist = [ x , y, z ] , if z in not None
if z is None then
mylist = [x,y]
Anyhelp!
cheers
Jojo
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<output function> | <variable> for <input set>, <predicate>
So something like `x**2 for x in [1, 2, 3, 4, 5, None, 9] if x != None`
would iterate over your input set pumping the current item into the
variable x, it will check "if x != None" and if that condition evaluates
true it will perform the function you set out to perform.
The predicate section acts as a filter to your data set ensuring the
variable you are working with meets certain conditions. If you wanted
to for eg. still accept the None but perform a different function on it
Python does allow it like `x**2 if x else 'Not a number' for x in [1, 2,
3, 4, 5, None, 9]`.
Hope that helps.
--
Kind Regards,
Christian Witts
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