Python number format muddle

Question

Please put me out of my misery. The following example seems to be using y twice rather than y and then m.

>>> m=8 >>> y=11 >>> print '20{0:02d}{0:02d}01'.format(y, m) 20111101

I've been through as much of the documentation as I can but can't figure out what would have been relatively straightforward with the old procedure:

>>> print '20%02d%02d01' % ( y, m ) 20110801

If someone could explain where I'm going wrong I'd be really grateful.

'20{0:02d}{0:02d}01' should be '20{0:02d}{1:02d}01'

Steven Rumbalski
– Steven Rumbalski

2012-05-07 16:25:14 +00:00
Commented May 7, 2012 at 16:25 — Steven Rumbalski
– Steven Rumbalski, Commented May 7, 2012 at 16:25
Even simpler: '20{:02d}{:02d}01'

akaRem
– akaRem

2012-05-07 17:14:29 +00:00
Commented May 7, 2012 at 17:14 — akaRem
– akaRem, Commented May 7, 2012 at 17:14

Levon · Accepted Answer · 2012-05-07 16:25:03Z

6

This will do what you want:

print '20{0:02d}{1:02d}01'.format(y, m)

You referred to the first argument twice.

answered May 7, 2012 at 16:25

Levon

144k35 gold badges205 silver badges194 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Component 10 Over a year ago

Doh! Thanks. I read the Python docs over and over but still missed this.

yak Over a year ago

You could leave out the 0 and 1 indexes (keep the colons though). You only need them if you want to reuse the args multiple times or if you want to reorder them.

corn3lius · Accepted Answer · 2012-05-07 16:26:19Z

3

>>> print '20{0:02d}{1:02d}01'.format(y, m)

you need to use the next arg in the arg list.

answered May 7, 2012 at 16:26

corn3lius

5,0053 gold badges33 silver badges37 bronze badges

Collectives™ on Stack Overflow

Python number format muddle

2 Answers 2

2 Comments

Comments

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Related