makemessages.py 文件源码

def copy_plural_forms(self, msgs, locale):
        """
        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.
        """
        django_dir = os.path.normpath(os.path.join(os.path.dirname(upath(django.__file__))))
        if self.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):
                with io.open(django_po, 'r', encoding='utf-8') as fp:
                    m = plural_forms_re.search(fp.read())
                if m:
                    plural_form_line = force_str(m.group('value'))
                    if self.verbosity > 1:
                        self.stdout.write("copying plural forms: %s\n" % plural_form_line)
                    lines = []
                    found = False
                    for line in msgs.split('\n'):
                        if not found and (not line or plural_forms_re.search(line)):
                            line = '%s\n' % plural_form_line
                            found = True
                        lines.append(line)
                    msgs = '\n'.join(lines)
                    break
        return msgs