Python: Invalid Token

Question

Some of you may recognize this as Project Euler's problem number 11. The one with the grid.

I'm trying to replicate the grid in a large multidimensional array, But it's giving me a syntax error and i'm not sure why

grid = [ 
[ 08, 02, 22, 97, 38, 15, 00, 40, 00, 75, 04, 05, 07, 78, 52, 12, 50, 77, 91, 08 ],
[ 49, 49, 99, 40, 17, 81, 18, 57, 60, 87, 17, 40, 98, 43, 69, 48, 04, 56, 62, 00 ],
[ 81, 49, 31, 73, 55, 79, 14, 29, 93, 71, 40, 67, 53, 88, 30, 03, 49, 13, 36, 65 ],
...

And I get this error:

  File "D:\development\Python\ProjectEuler\p11.py", line 3
    [ 08, 02, 22, 97, 38, 15, 00, 40, 00, 75, 04, 05, 07, 78, 52, 12, 50, 77, 91 , 08 ],
       ^ SyntaxError: invalid token

Why is it throwing an error before the comma?

Paige Ruten · Accepted Answer · 2008-12-03 04:04:50Z

40

I think when you start a literal number with a 0, it interprets it as an octal number and you can't have an '8' in an octal number.

answered Dec 3, 2008 at 4:04

Paige Ruten

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Comments

yairchu · Accepted Answer · 2008-12-03 04:42:41Z

3

Note that the "^" symbol in the error points exactly to the erroneous column. Together with the line number it points exactly on the digit 8. This can help lead you to what Jeremy suggested.

answered Dec 3, 2008 at 4:42

yairchu

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2 Comments

Bonifacio2 Over a year ago

Although you provided a nice tip, this doesn't answer the question. So I think this should be a comment and not an answer. -1.

yairchu Over a year ago

@Bonifacio2: I think not only is this an answer, but also a good one, even if it doesn't fully answer the OP's question. This answer helps the OP parse the syntax error that got. Originally (prior to edit) he asked "Why is it throwing an error after the comma?" when in fact the error is before the comma, and my answer can help him figure out where the error was. "give a man a fish and you feed him for a day; teach a man to fish and you feed him for a lifetime"

maxp · Accepted Answer · 2008-12-03 16:14:45Z

1

Just remove leading zeros.

First zero makes number octal.

answered Dec 3, 2008 at 16:14

maxp

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