This one had me stumped for a while:

# -*- coding: utf-7 -*-
import datetime
from sqlalchemy import ForeignKey, Column
from sqlalchemy.types import Integer, Unicode, Boolean, DateTime

default_due_date = + datetime.timedelta(days=30)

Syntax error found on last line.

Hmm, bring up a python interpreter and type the last line in with the imports. Works fine.

It’s the first line that is the problem, I typoed it and made it utf-7 not utf-8. I suppose it means that it is case-insenstive. Still, it wasn’t too clear to me at least, what was going on.

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Comments (11)

  1. sepp

    The problem isn’t that it is case-insenstive, but that u’+’ encoded in UTF-7 is b’+-‘.

    • Ahh, is that it? I thought it was getting DateTime mixed with datetime but that was a furphy.
      So UTF-8 plus is UTF-7 plus,minus.

      That must do some odd things! Thanks for the note.

      • @Craig : UTF-7 is simply another encoding for Unicode, which only uses 7 bits per byte. It is not very used but it would be an alternative to UTF-8 or UTF-16 + Base64. Now, indeed, the character plus (just character plus, or Unicode character plus if you like, but not UTF-8 plus, at it is an abstract character, independant from the encoding) is encoded in UTF-7 as two bytes that would be read +- when incorrectly decoding them as ASCII.

    • himdel

      What you say is true but his file is probably not actually saved as utf7 so the conversion goes the other way. So the problem is that b’+ ‘, when interpreted as UTF-7 yields just u’ ‘: b’+’ denotes start of base64 block, the block ends on the first non-[A-Za-z+/] character which is the space immediately behind the +, so just the + gets consumed.

  2. $ echo ‘default_due_date = + datetime.timedelta(days=30)’| iconv -f utf7 -t utf8
    default_due_date = datetime.timedelta(days=30)

    The ‘ + ‘ sequence becomes just ‘ ‘.

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