gettext.NullTranslations

class gettext.NullTranslations(fp=None)

Takes an optional file object fp, which is ignored by the base class. Initializes “protected” instance variables _info and _charset which are set by derived classes, as well as _fallback, which is set through add_fallback(). It then calls self._parse(fp) if fp is not None.

_parse(fp)

No-op’d in the base class, this method takes file object fp, and reads the data from the file, initializing its message catalog. If you have an unsupported message catalog file format, you should override this method to parse your format.

add_fallback(fallback)

Add fallback as the fallback object for the current translation object. A translation object should consult the fallback if it cannot provide a translation for a given message.

gettext(message)

If a fallback has been set, forward gettext() to the fallback. Otherwise, return the translated message. Overridden in derived classes.

lgettext(message)

If a fallback has been set, forward lgettext() to the fallback. Otherwise, return the translated message. Overridden in derived classes.

ngettext(singular, plural, n)

If a fallback has been set, forward ngettext() to the fallback. Otherwise, return the translated message. Overridden in derived classes.

lngettext(singular, plural, n)

If a fallback has been set, forward lngettext() to the fallback. Otherwise, return the translated message. Overridden in derived classes.

info()

Return the “protected” _info variable.

charset()

Return the “protected” _charset variable, which is the encoding of the message catalog file.

output_charset()

Return the “protected” _output_charset variable, which defines the encoding used to return translated messages in lgettext() and lngettext().

set_output_charset(charset)

Change the “protected” _output_charset variable, which defines the encoding used to return translated messages.

install(names=None)

This method installs self.gettext() into the built-in namespace, binding it to _.

If the names parameter is given, it must be a sequence containing the names of functions you want to install in the builtins namespace in addition to _(). Supported names are 'gettext' (bound to self.gettext()), 'ngettext' (bound to self.ngettext()), 'lgettext' and 'lngettext'.

Note that this is only one way, albeit the most convenient way, to make the _() function available to your application. Because it affects the entire application globally, and specifically the built-in namespace, localized modules should never install _(). Instead, they should use this code to make _() available to their module:

import gettext
t = gettext.translation('mymodule', ...)
_ = t.gettext

This puts _() only in the module’s global namespace and so only affects calls within this module.