Python tuple if statements

Question

Fairly new to python here,

I have a python tuple

reportTuple = (('Keith', 'Saturday', 10), ('Jane', 'Monday', 12))

and I want to print the name and the number but only if the value is Saturday. (print elements 0, 2 but only if elements 1 value == Saturday.)

Any ideas how to write to write an if statement to grab them?

Beta Decay · Accepted Answer · 2016-08-08 23:58:44Z

2

Loop through the array, checking the value of the central element:

for i in reportTuple: # Loop through each element of reportTuple
    if i[1] == "Saturday": # Is the day Saturday?
        print(i[0]) # Print name
        print(i[2]) # Print number

May I ask what the problem was here? Was it the for loop?

answered Aug 8, 2016 at 23:58

Beta Decay

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Aur · Accepted Answer · 2016-08-09 13:03:15Z

1

Updated first list with Junapa's modification:

You can do this with a list comprehension.

print(*("{}: {}".format(name,number) for (name, day, number) in reportTuple if day == 'Saturday'))

will print out

Keith 10

If you wanted to save the results of the if statement in a list, then you can do

['{} {}'.format(name, number) for (name, day, number) in reportTuple if day == 'Saturday']

which will return you

['Keith 10']

edited Aug 9, 2016 at 13:03

answered Aug 9, 2016 at 0:03

Aur

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2 Comments

Aur Over a year ago

Well, it's here if he wants it. If not, there are other answer here that he can use. I really liked list comprehensions when I first started learning python so I figured I'll add a list comprehension answer too for him or for the random passerby.

juanpa.arrivillaga Over a year ago

Printing from inside a comprehension is bad form. Comprehensions are functional constructs - people don't expect side effects inside of them. Rather, do something like: print(*("{}: {}".format(name,number) for (name, day, number) in reportTuple if day == 'Saturday'))

Cody · Accepted Answer · 2016-08-08 23:58:23Z

0

I'm a very casual Python user so there is almost certainly some magic way to do this far more elegantly than I have, but I just tried this and it worked:

reportTuple = (('Keith', 'Saturday', 10), ('Jane', 'Monday', 12))
for report in reportTuple:
    if report[1] == 'Saturday':
        print(report[0], report[2])

prints

Keith 10

answered Aug 8, 2016 at 23:58

Cody

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