makemessages.py 文件源码

def copy_plural_forms(msgs, locale, domain, verbosity):
    """
    Copies plural forms header contents from a Django catalog of locale to
    the msgs string, inserting it at the right place. msgs should be the
    contents of a newly created .po file.
    """
    import django
    django_dir = os.path.normpath(os.path.join(os.path.dirname(django.__file__)))
    if domain == 'djangojs':
        domains = ('djangojs', 'django')
    else:
        domains = ('django',)
    for domain in domains:
        django_po = os.path.join(django_dir, 'conf', 'locale', locale, 'LC_MESSAGES', '%s.po' % domain)
        if os.path.exists(django_po):
            m = plural_forms_re.search(open(django_po, 'rU').read())
            if m:
                if verbosity > 1:
                    sys.stderr.write("copying plural forms: %s\n" % m.group('value'))
                lines = []
                seen = False
                for line in msgs.split('\n'):
                    if not line and not seen:
                        line = '%s\n' % m.group('value')
                        seen = True
                    lines.append(line)
                msgs = '\n'.join(lines)
                break
    return msgs