def _unify_values(self, section, variables):
"""Create a sequence of lookups with 'variables' taking priority over
the 'section' which takes priority over the DEFAULTSECT.
"""
try:
sectiondict = self._sections[section]
except KeyError:
if section != self.default_section:
raise NoSectionError(section)
else:
sectiondict = {}
# Update with the entry specific variables
vardict = {}
if variables:
for key, value in variables.items():
if value is not None:
value = str(value)
vardict[self.optionxform(key)] = value
prefix = section.split(".", 1)[0] + ".DEFAULT"
# print("searched for {0}".format(prefix))
try:
defaultdict = self._sections[prefix]
return _ChainMap(vardict, sectiondict, defaultdict, self._defaults)
except KeyError:
return _ChainMap(vardict, sectiondict, self._defaults)
def _unify_values(self, section, variables):
"""Create a sequence of lookups with 'variables' taking priority over
the 'section' which takes priority over the DEFAULTSECT.
"""
try:
sectiondict = self._sections[section]
except KeyError:
if section != self.default_section:
raise NoSectionError(section)
else:
sectiondict = {}
# Update with the entry specific variables
vardict = {}
if variables:
for key, value in variables.items():
if value is not None:
value = str(value)
vardict[self.optionxform(key)] = value
prefix = section.split(".",1)[0] + ".DEFAULT"
# print("searched for {0}".format(prefix))
try:
defaultdict = self._sections[prefix]
return _ChainMap(vardict, sectiondict, defaultdict, self._defaults)
except KeyError:
return _ChainMap(vardict, sectiondict, self._defaults)
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:
if ':-' in named:
var, _, default = named.partition(':-')
return mapping.get(var) or default
if '-' in named:
var, _, default = named.partition('-')
return mapping.get(var, default)
val = mapping[named]
return '%s' % (val,)
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 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:
val = mapping[named]
# We use this idiom instead of str() because the latter will
# fail if val is a Unicode containing non-ASCII characters.
return '%s' % (val, )
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:
# We use this idiom instead of str() because the latter
# will fail if val is a Unicode containing non-ASCII
return '%s' % (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)
def substitute(*args, **kws):
if not args:
raise TypeError(
"descriptor 'substitute' of 'Template' object needs an argument"
)
self, *args = args
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]
def convert(mo):
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 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 self.extract_value(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 _infer_type(self.pattern.sub(convert, self.template))
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[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)
def __init__(self, config, handler_reg=None, version=1):
self.config = config
self._api = None
self.version = version
if handler_reg is None:
handler_reg = {}
self.handler_reg = _ChainMap(handler_reg)
self._datum_cache = boltons.cacheutils.LRU(max_size=1000000)
self._handler_cache = boltons.cacheutils.LRU()
self._resource_cache = boltons.cacheutils.LRU(on_miss=self._r_on_miss)
self.known_spec = dict(self.KNOWN_SPEC)
def __init__(self, config, handler_reg=None, version=1):
self.config = config
self._api = None
self.version = version
if handler_reg is None:
handler_reg = {}
self.handler_reg = _ChainMap(handler_reg)
self._datum_cache = boltons.cacheutils.LRU(max_size=1000000)
self._handler_cache = boltons.cacheutils.LRU()
self._resource_cache = boltons.cacheutils.LRU(on_miss=self._r_on_miss)
self.known_spec = dict(self.KNOWN_SPEC)
def _unify_values(self, section, vars):
sectiondict = {}
try:
sectiondict = self._sections[section]
except KeyError:
if section != self.default_section:
raise NoSectionError(section)
vardict = {}
if vars:
for (key, value) in vars.items():
if value is not None:
value = str(value)
vardict[self.optionxform(key)] = value
return _ChainMap(vardict, sectiondict, self._defaults)
def _unify_values(self, section, vars):
sectiondict = {}
try:
sectiondict = self._sections[section]
except KeyError:
if section != self.default_section:
raise NoSectionError(section)
vardict = {}
if vars:
for (key, value) in vars.items():
if value is not None:
value = str(value)
vardict[self.optionxform(key)] = value
return _ChainMap(vardict, sectiondict, self._defaults)
class Template(metaclass=_TemplateMetaclass):
"""A string class for supporting $-substitutions."""
delimiter = '$'
# r'[a-z]' matches to non-ASCII letters when used with IGNORECASE, but
# without the ASCII flag. We can't add re.ASCII to flags because of
# backward compatibility. So we use the ?a local flag and [a-z] pattern.
# See https://bugs.python.org/issue31672
idpattern = r'(?a:[_a-z][_a-z0-9]*)'
braceidpattern = None
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(self, mapping=_sentinel_dict, /, **kws):
if mapping is _sentinel_dict:
mapping = kws
elif kws:
mapping = _ChainMap(kws, mapping)
# 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 __init__(self,
flags=None,
path=None,
files=None,
converters=None,
namespace=None):
"""Create a new Reader.
Argument `flags` defines the open flags of the journal, which can be one
of, or ORed combination of constants: LOCAL_ONLY (default) opens journal
on local machine only; RUNTIME_ONLY opens only volatile journal files;
and SYSTEM_ONLY opens only journal files of system services and the kernel.
Argument `path` is the directory of journal files, either a file system
path or a file descriptor. Specify `namespace` to read from specific journal
namespace. Note that `flags`, `path`, `files` and `namespace` are exclusive.
Argument `converters` is a dictionary which updates the
DEFAULT_CONVERTERS to convert journal field values. Field names are used
as keys into this dictionary. The values must be single argument
functions, which take a `bytes` object and return a converted
value. When there's no entry for a field name, then the default UTF-8
decoding will be attempted. If the conversion fails with a ValueError,
unconverted bytes object will be returned. (Note that ValueEror is a
superclass of UnicodeDecodeError).
Reader implements the context manager protocol: the journal will be
closed when exiting the block.
"""
if flags is None:
if path is None and files is None:
# This mimics journalctl behaviour of default to local journal only
flags = LOCAL_ONLY
else:
flags = 0
super(Reader, self).__init__(flags, path, files, namespace)
if _sys.version_info >= (3, 3):
self.converters = _ChainMap()
if converters is not None:
self.converters.maps.append(converters)
self.converters.maps.append(DEFAULT_CONVERTERS)
else:
self.converters = DEFAULT_CONVERTERS.copy()
if converters is not None:
self.converters.update(converters)
def _unify_values(self, section, vars):
"""Create a sequence of lookups with 'vars' taking priority over
the 'section' which takes priority over the DEFAULTSECT.
"""
sectiondict = {}
try:
sectiondict = self._sections[section]
except KeyError:
if section != self.default_section:
raise NoSectionError(section)
# Update with the entry specific variables
vardict = {}
if vars:
for key, value in vars.items():
if value is not None:
value = str(value)
vardict[self.optionxform(key)] = value
return _ChainMap(vardict, sectiondict, self._defaults)
def _unify_values(self, section, vars):
"""Create a sequence of lookups with 'vars' taking priority over
the 'section' which takes priority over the DEFAULTSECT.
"""
sectiondict = {}
try:
sectiondict = self._sections[section]
except KeyError:
if section != self.default_section:
raise NoSectionError(section)
# Update with the entry specific variables
vardict = {}
if vars:
for key, value in vars.items():
if value is not None:
value = str(value)
vardict[self.optionxform(key)] = value
return _ChainMap(vardict, sectiondict, self._defaults)
def __init__(self, flags=None, path=None, files=None, converters=None):
"""Create a new Reader.
Argument `flags` defines the open flags of the journal, which can be one
of, or ORed combination of constants: LOCAL_ONLY (default) opens journal
on local machine only; RUNTIME_ONLY opens only volatile journal files;
and SYSTEM_ONLY opens only journal files of system services and the kernel.
Argument `path` is the directory of journal files, either a file system
path or a file descriptor. Note that `flags`, `path`, and `files` are
exclusive.
Argument `converters` is a dictionary which updates the
DEFAULT_CONVERTERS to convert journal field values. Field names are used
as keys into this dictionary. The values must be single argument
functions, which take a `bytes` object and return a converted
value. When there's no entry for a field name, then the default UTF-8
decoding will be attempted. If the conversion fails with a ValueError,
unconverted bytes object will be returned. (Note that ValueEror is a
superclass of UnicodeDecodeError).
Reader implements the context manager protocol: the journal will be
closed when exiting the block.
"""
if flags is None:
if path is None and files is None:
# This mimics journalctl behaviour of default to local journal only
flags = LOCAL_ONLY
else:
flags = 0
super(Reader, self).__init__(flags, path, files)
if _sys.version_info >= (3,3):
self.converters = _ChainMap()
if converters is not None:
self.converters.maps.append(converters)
self.converters.maps.append(DEFAULT_CONVERTERS)
else:
self.converters = DEFAULT_CONVERTERS.copy()
if converters is not None:
self.converters.update(converters)
def __init__(self, flags=0, path=None, converters=None):
"""Create an instance of Reader, which allows filtering and
return of journal entries.
Argument `flags` sets open flags of the journal, which can be one
of, or ORed combination of constants: LOCAL_ONLY (default) opens
journal on local machine only; RUNTIME_ONLY opens only
volatile journal files; and SYSTEM_ONLY opens only
journal files of system services and the kernel.
Argument `path` is the directory of journal files. Note that
`flags` and `path` are exclusive.
Argument `converters` is a dictionary which updates the
DEFAULT_CONVERTERS to convert journal field values. Field
names are used as keys into this dictionary. The values must
be single argument functions, which take a `bytes` object and
return a converted value. When there's no entry for a field
name, then the default UTF-8 decoding will be attempted. If
the conversion fails with a ValueError, unconverted bytes
object will be returned. (Note that ValueEror is a superclass
of UnicodeDecodeError).
Reader implements the context manager protocol: the journal
will be closed when exiting the block.
"""
super(Reader, self).__init__(flags, path)
if _sys.version_info >= (3, 3):
self.converters = _ChainMap()
if converters is not None:
self.converters.maps.append(converters)
self.converters.maps.append(DEFAULT_CONVERTERS)
else:
self.converters = DEFAULT_CONVERTERS.copy()
if converters is not None:
self.converters.update(converters)
class Template:
"""A string class for supporting $-substitutions."""
delimiter = '$'
# r'[a-z]' matches to non-ASCII letters when used with IGNORECASE, but
# without the ASCII flag. We can't add re.ASCII to flags because of
# backward compatibility. So we use the ?a local flag and [a-z] pattern.
# See https://bugs.python.org/issue31672
idpattern = r'(?a:[_a-z][_a-z0-9]*)'
braceidpattern = None
flags = _re.IGNORECASE
def __init_subclass__(cls):
super().__init_subclass__()
if 'pattern' in cls.__dict__:
pattern = cls.pattern
else:
delim = _re.escape(cls.delimiter)
id = cls.idpattern
bid = cls.braceidpattern or cls.idpattern
pattern = fr"""
{delim}(?:
(?P<escaped>{delim}) | # Escape sequence of two delimiters
(?P<named>{id}) | # delimiter and a Python identifier
{{(?P<braced>{bid})}} | # delimiter and a braced identifier
(?P<invalid>) # Other ill-formed delimiter exprs
)
"""
cls.pattern = _re.compile(pattern, cls.flags | _re.VERBOSE)
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(self, mapping=_sentinel_dict, /, **kws):
if mapping is _sentinel_dict:
mapping = kws
elif kws:
mapping = _ChainMap(kws, mapping)
# 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)
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(self, mapping=_sentinel_dict, /, **kws):
if mapping is _sentinel_dict:
mapping = kws
elif kws:
mapping = _ChainMap(kws, mapping)
# 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)
#def safe_eval(expression, /, locals=None):
#def safe_eval(expression, /, locals=None, *, nonlocals=None):
def safe_eval(expression, /,*, locals=None, nonlocals=None):
# assume expression cannot setitem in locals
# but expression can getitem in locals and update it
#
if locals is None:
locals = {}
locals = _MappingProxyType(locals)
if 1:
#although nonlocals is useless, here to match API-of-safe_eval with safe_exec
#r'''[[[
if nonlocals:
nonlocals = _MappingProxyType(nonlocals)
locals_nonlocals = _ChainMap(locals, nonlocals)
else:
locals_nonlocals = locals
#]]]'''
else:
locals_nonlocals = locals
return _global_eval(expression, dict(_globals), locals_nonlocals)
r'''
Help on built-in function eval in module builtins:
eval(source, globals=None, locals=None, /)
Evaluate the given source in the context of globals and locals.
The source may be a string representing a Python expression or a code object as returned by compile().
The globals must be a dictionary and locals can be any mapping, defaulting to the current globals and locals.
def new_child(self, m=None):
if m is None:
m = {}
return _ChainMap(m, self)
def new_child(self, m=None):
if m is None:
m = {}
return _ChainMap(m, self)
def clear(self):
self._mapping = _ChainMap()
def __init__(self, inst, bdict, instance_data, _ChainMap=_ChainMap):
self.inst = inst
self._mapping = _ChainMap(instance_data, bdict)
