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AIM: singingxduck
Programming Python for the fun of it.
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Emily Fortuna wrote:
Thanks, I knew there had to be a really simple way to do it.
Emily
Orri Ganel wrote:
Emily Fortuna wrote:
I feel like there should be a better way to do this process:
Can you please help?
(This is trivial example code I created off the top of my head, but
the same concept that I am trying to do elsewhere.)
class Person(object):
def __init__(self, first_name, age, fav_color):
self.first_name = first_name
self.age = age
self.fav_color = fav_color
first_names = ['emily', 'john', 'jeremy', 'juanita']
ages = [6, 34, 1, 19]
colors = ['blue', 'orange', 'green', 'yellow']
ageIter = ages.iter()
colorIter = colors.iter()
people = [Person(name, ageIter.next(), colorIter.next()) for name in
first_names]
print people
any suggestions, please?
Emily
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>>> people = [Person(first_names[i], ages[i], colors[i]) for i in
range(len(ages))]
Usually, you want to stay away from for i in range(len(foo)) because
it's easier to just use for elem in foo or for i, elem in
enumerate(foo), but since you need the indeces alone, this seems like
an appropriate place to use it. Alternatively, you could zip them
together:
>>> people = [Person(*zipped) for zipped in zip(first_names, ages,
colors)]
By zipping the lists together, you end up with a list of three-tuples:
>>> zip(first_names, ages, colors)
[('emily', 6, 'blue'), ('john', 34, 'orange'), ('jeremy', 1,
'green'), ('juanita', 19, 'yellow')]
And by putting an asterisk in front of zipped, you're passing each
element in the three-tuple one at a time instead of the whole shebang
at once, so that you end up with three arguments, not one.
HTH,
Orri
Actually, Kent had a very similar, and much more readable suggestion (if
you didn't see it, it's the following):
>>> people = [Person(first_name, age, color) for first_name, age, color
in zip(first_names, ages, colors)]
I guess it depends on how legible you feel your code needs to be; for
some, my suggestion would be more than enough.
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Email: singingxduck AT gmail DOT com
AIM: singingxduck
Programming Python for the fun of it.
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