def force_bytes(s, encoding='utf-8', strings_only=False, errors='strict'): """ Similar to smart_bytes, except that lazy instances are resolved to strings, rather than kept as lazy objects. If strings_only is True, don't convert (some) non-string-like objects. """ if isinstance(s, bytes): if encoding == 'utf-8': return s else: return s.decode('utf-8', errors).encode(encoding, errors) if strings_only and (s is None or isinstance(s, int)): return s if isinstance(s, Promise): return six.text_type(s).encode(encoding, errors) if not isinstance(s, six.string_types): try: if six.PY3: return six.text_type(s).encode(encoding) else: return bytes(s) except UnicodeEncodeError: if isinstance(s, Exception): # An Exception subclass containing non-ASCII data that doesn't # know how to print itself properly. We shouldn't raise a # further exception. return b' '.join([force_bytes(arg, encoding, strings_only, errors) for arg in s]) return six.text_type(s).encode(encoding, errors) else: return s.encode(encoding, errors)
def __mod__(self, rhs): if self._delegate_bytes and not six.PY3: return bytes(self) % rhs elif self._delegate_text: return six.text_type(self) % rhs else: raise AssertionError('__mod__ not supported for non-string types')
def force_text(s, encoding='utf-8', strings_only=False, errors='strict'): """ Similar to smart_text, except that lazy instances are resolved to strings, rather than kept as lazy objects. If strings_only is True, don't convert (some) non-string-like objects. """ # Handle the common case first, saves 30-40% when s is an instance of # six.text_type. This function gets called often in that setting. if isinstance(s, six.text_type): return s if strings_only and is_protected_type(s): return s try: if not isinstance(s, six.string_types): if hasattr(s, '__unicode__'): s = s.__unicode__() else: if six.PY3: if isinstance(s, bytes): s = six.text_type(s, encoding, errors) else: s = six.text_type(s) else: s = six.text_type(bytes(s), encoding, errors) else: # Note: We use .decode() here, instead of six.text_type(s, encoding, # errors), so that if s is a SafeBytes, it ends up being a # SafeText at the end. s = s.decode(encoding, errors) except UnicodeDecodeError as e: if not isinstance(s, Exception): raise DjangoUnicodeDecodeError(s, *e.args) else: # If we get to here, the caller has passed in an Exception # subclass populated with non-ASCII bytestring data without a # working unicode method. Try to handle this without raising a # further exception by individually forcing the exception args # to unicode. s = ' '.join([force_text(arg, encoding, strings_only, errors) for arg in s]) return s