diff options
Diffstat (limited to 'youtube/template.py')
-rw-r--r-- | youtube/template.py | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/youtube/template.py b/youtube/template.py deleted file mode 100644 index d1a5e58..0000000 --- a/youtube/template.py +++ /dev/null @@ -1,132 +0,0 @@ - -import re as _re -from collections import ChainMap as _ChainMap - -class _TemplateMetaclass(type): - pattern = r""" - %(delim)s(?: - (?P<escaped>%(delim)s) | # Escape sequence of two delimiters - (?P<named>%(id)s) | # delimiter and a Python identifier - {(?P<braced>%(id)s)} | # delimiter and a braced identifier - (?P<invalid>) # Other ill-formed delimiter exprs - ) - """ - - def __init__(cls, name, bases, dct): - super(_TemplateMetaclass, cls).__init__(name, bases, dct) - if 'pattern' in dct: - pattern = cls.pattern - else: - pattern = _TemplateMetaclass.pattern % { - 'delim' : _re.escape(cls.delimiter), - 'id' : cls.idpattern, - } - cls.pattern = _re.compile(pattern, cls.flags | _re.VERBOSE) - - -class Template(metaclass=_TemplateMetaclass): - """A string class for supporting $-substitutions.""" - - delimiter = '$' - idpattern = r'[_a-z][_a-z0-9]*' - flags = _re.IGNORECASE - - def __init__(self, template): - self.template = template - - # Search for $$, $identifier, ${identifier}, and any bare $'s - - def _invalid(self, mo): - i = mo.start('invalid') - lines = self.template[:i].splitlines(keepends=True) - if not lines: - colno = 1 - lineno = 1 - else: - colno = i - len(''.join(lines[:-1])) - lineno = len(lines) - raise ValueError('Invalid placeholder in string: line %d, col %d' % - (lineno, colno)) - - 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: - mapping = kws - elif kws: - mapping = _ChainMap(kws, args[0]) - else: - mapping = args[0] - # Helper function for .sub() - def convert(mo): - # Check the most common path first. - named = mo.group('named') or mo.group('braced') - if named is not None: - return str(mapping.get(named,'')) - if mo.group('escaped') is not None: - return self.delimiter - if mo.group('invalid') is not None: - self._invalid(mo) - raise ValueError('Unrecognized named group in pattern', - self.pattern) - return self.pattern.sub(convert, self.template) - - def strict_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: - mapping = kws - elif kws: - mapping = _ChainMap(kws, args[0]) - else: - mapping = args[0] - # Helper function for .sub() - def convert(mo): - # Check the most common path first. - named = mo.group('named') or mo.group('braced') - if named is not None: - return str(mapping[named]) - if mo.group('escaped') is not None: - return self.delimiter - if mo.group('invalid') is not None: - self._invalid(mo) - raise ValueError('Unrecognized named group in pattern', - self.pattern) - return self.pattern.sub(convert, self.template) - - 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: - mapping = kws - elif kws: - mapping = _ChainMap(kws, args[0]) - else: - mapping = args[0] - # Helper function for .sub() - def convert(mo): - named = mo.group('named') or mo.group('braced') - if named is not None: - try: - return str(mapping[named]) - except KeyError: - return mo.group() - if mo.group('escaped') is not None: - return self.delimiter - if mo.group('invalid') is not None: - return mo.group() - raise ValueError('Unrecognized named group in pattern', - self.pattern) - return self.pattern.sub(convert, self.template) |