diff options
Diffstat (limited to 'Lib/string.py')
| -rw-r--r-- | Lib/string.py | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/Lib/string.py b/Lib/string.py index 72a09f7..a4c48b2 100644 --- a/Lib/string.py +++ b/Lib/string.py @@ -94,7 +94,11 @@ class Template(metaclass=_TemplateMetaclass): raise ValueError('Invalid placeholder in string: line %d, col %d' % (lineno, colno)) - def substitute(self, *args, **kws): + def substitute(*args, **kws): + if not args: + raise TypeError("descriptor 'substitute' of 'Template' object " + "needs an argument") + self, *args = args # allow the "self" keyword be passed if len(args) > 1: raise TypeError('Too many positional arguments') if not args: @@ -120,7 +124,11 @@ class Template(metaclass=_TemplateMetaclass): self.pattern) return self.pattern.sub(convert, self.template) - def safe_substitute(self, *args, **kws): + def safe_substitute(*args, **kws): + if not args: + raise TypeError("descriptor 'safe_substitute' of 'Template' object " + "needs an argument") + self, *args = args # allow the "self" keyword be passed if len(args) > 1: raise TypeError('Too many positional arguments') if not args: @@ -160,7 +168,19 @@ class Template(metaclass=_TemplateMetaclass): # The field name parser is implemented in _string.formatter_field_name_split class Formatter: - def format(self, format_string, *args, **kwargs): + def format(*args, **kwargs): + if not args: + raise TypeError("descriptor 'format' of 'Formatter' object " + "needs an argument") + self, *args = args # allow the "self" keyword be passed + try: + format_string, *args = args # allow the "format_string" keyword be passed + except ValueError: + if 'format_string' in kwargs: + format_string = kwargs.pop('format_string') + else: + raise TypeError("format() missing 1 required positional " + "argument: 'format_string'") from None return self.vformat(format_string, args, kwargs) def vformat(self, format_string, args, kwargs): |