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d S( sQ Various routines that help with validation of translations.
:since: version 0.9
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basestringR t Nonet listt tuplet lent num_plurals( t catalogt messaget msgstrs( ( s; /usr/lib/python2.7/site-packages/babel/messages/checkers.pyR s c C s¡ d | j k r d S| j } t | t t f ƒ s= | f } n | j } t | t t f ƒ sg | f } n x3 t | | ƒ D]" \ } } | rw t | | ƒ qw qw Wd S( s9 Verify the format string placeholders in the translation.s
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| f ƒ ‚ q9q9Wd S( s¨ Test format string `alternative` against `format`. `format` can be the
msgid of a message and `alternative` one of the `msgstr`\s. The two
arguments are not interchangeable as `alternative` may contain less
placeholders if `format` uses named placeholders.
The behavior of this function is undefined if the string does not use
string formattings.
If the string formatting of `alternative` is compatible to `format` the
function returns `None`, otherwise a `TranslationError` is raised.
Examples for compatible format strings:
>>> _validate_format('Hello %s!', 'Hallo %s!')
>>> _validate_format('Hello %i!', 'Hallo %d!')
Example for an incompatible format strings:
>>> _validate_format('Hello %(name)s!', 'Hallo %s!')
Traceback (most recent call last):
...
TranslationError: the format strings are of different kinds
This function is used by the `python_format` checker.
:param format: The original format string
:param alternative: The alternative format string that should be checked
against format
:return: None on success
:raises TranslationError: on formatting errors
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