Is there any ways to define 2-tuples in one line?

Question

I'm not expierenced in python. I need to define field 'year' with range restriction. Now i'm using this code, but I think there exists shorten way to do this.

YEAR_CHOICE = []
for year in range(2020,1899,-1):
   YEAR_CHOICE += [(year, year)]
year = models.PositiveSmallIntegerField('Year', choices=YEAR_CHOICE, default=0)

Is therу any ways to define 2-tuples in one line? May be I can make field what I need in other way? Thank you!

Answer 1

You should look at using a list comprehension:

YEAR_CHOICE = [(year,year) for year in xrange(2020,1899,-1)]

You should also usage xrange instead of range. xrange is preferred as it returns the values one by one rather than creating the whole list.

Answer 2

zip the range with itself:

YEAR_CHOICE = zip(*[range(2020,1899,-1)]*2)

or use list comprehension:

YEAR_CHOICE = [(year,year) for year in range(2020,1899,-1)]