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Localization Revisted (aka. Translations Evolve...

Localization Revisted (aka. Translations Evolved) by Ruchi Varshney

PyCon 2014

April 13, 2014
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  1. most common tools are gettext and babel ! import gettext

    as _ print _("Translate me.") ! from babel import dates, numbers dates.format_datetime(date, locale='de') numbers.format_decimal(1.234, locale='de') ! ! basics
  2. ! # Extraction config file (babel.cfg) [python: **.py] [jinja2: **.html]

    [javascript: **.js] ! [extractors] python = babel.messages.extract:extract_python jinja2 = jinja2.ext:babel_extract javascript = babel.messages.extract:extract_javascript ! ! basics
  3. ! # Translations for MYAPP. # Copyright (c) 2014 ORGANIZATION

    ! #: app/views.py:20 #, python-format msgid "Translate me." msgstr "" ! ! basics
  4. ! class Greetings(object): WELCOME_MESSAGE = _("Hey there!") BYE_MESSAGE = _("Bye!")

    ! ! def greeting(name, is_welcome): if is_welcome: return Greetings.WELCOME_MESSAGE else: return Greetings.BYE_MESSAGE strings before logic
  5. ! class Greetings(object): WELCOME_MESSAGE = _("Hey there!”) BYE_MESSAGE = _("Bye!")

    BYE_MESSAGE = _("See you later!") ! ! ! ! ! lost in translation
  6. ! #, python-format msgid "Bye!" msgstr "Au revoir!" ! #,

    python-format msgid "See you later!" msgstr "" ! lost in translation
  7. ! class Greetings(object): WELCOME_MESSAGE = _("Hey there!”) BYE_MESSAGE = _("Bye!")

    NEW_BYE_MESSAGE = _("See you later!") ! ! ! ! ! lost in translation
  8. babel gotchas “strings might be marked as fuzzy — if

    you have fuzzy entries, make sure to check them by hand and remove the fuzzy flag before compiling.”
  9. • —no-fuzzy-matching • other useful ones • —ignore-obsolete True •

    —add-comments TRANSLATOR: • —keyword "_lazy" babel flags
  10. • find the last translation date • run string extraction

    • send po file for translation • wait… • get translations back • integrate with app • …. mundane dev
  11. • sample code • https://github.com/rvarshney/translations • how to i18n and

    l10n (pycon 2013) • http://bit.ly/pyconi18n • https://www.youtube.com/watch?v=QUFPPJMjn6k resources
  12. • python packages and tools • gettext, babel, potpie, polib

    • githooks, webhooks, jenkins, travis • content management • smartling, transifex have known python support • django-rosetta (open source) resources