def __call__(self, obj, p, cycle):
r"""
Format matrix.
INPUT:
- ``obj`` -- anything. Object to format.
- ``p`` -- PrettyPrinter instance.
- ``cycle`` -- boolean. Whether there is a cycle.
OUTPUT:
Boolean. Whether the representer is applicable to ``obj``. If
``True``, the string representation is appended to ``p``.
EXAMPLES::
sage: from sage.repl.display.fancy_repr import PlainPythonRepr
sage: pp = PlainPythonRepr()
sage: pp.format_string(type(1))
"<type 'sage.rings.integer.Integer'>"
Do not swallow a trailing newline at the end of the output of
a custom representer. Note that it is undesirable to have a
trailing newline, and if we don't display it you can't fix
it::
sage: class Newline(object):
....: def __repr__(self):
....: return 'newline\n'
sage: n = Newline()
sage: pp.format_string(n)
'newline\n'
sage: pp.format_string([n, n, n])
'[newline\n, newline\n, newline\n]'
sage: [n, n, n]
[newline
, newline
, newline
]
"""
klass = _safe_getattr(obj, '__class__', None) or type(obj)
klass_repr = _safe_getattr(klass, '__repr__', None)
if klass_repr in _baseclass_reprs:
p.text(klass_repr(obj))
else:
# A user-provided repr. Find newlines and replace them with p.break_()
output = _safe_repr(obj)
for idx, output_line in enumerate(output.split('\n')):
if idx:
p.break_()
p.text(output_line)
return True
def __call__(self, obj, p, cycle):
r"""
Format matrix.
INPUT:
- ``obj`` -- anything. Object to format.
- ``p`` -- PrettyPrinter instance.
- ``cycle`` -- boolean. Whether there is a cycle.
OUTPUT:
Boolean. Whether the representer is applicable to ``obj``. If
``True``, the string representation is appended to ``p``.
EXAMPLES::
sage: from sage.repl.display.fancy_repr import PlainPythonRepr
sage: pp = PlainPythonRepr()
sage: pp.format_string(type(1))
"<type 'sage.rings.integer.Integer'>"
Do not swallow a trailing newline at the end of the output of
a custom representer. Note that it is undesirable to have a
trailing newline, and if we don't display it you can't fix
it::
sage: class Newline(object):
....: def __repr__(self):
....: return 'newline\n'
sage: n = Newline()
sage: pp.format_string(n)
'newline\n'
sage: pp.format_string([n, n, n])
'[newline\n, newline\n, newline\n]'
sage: [n, n, n]
[newline
, newline
, newline
]
"""
klass = _safe_getattr(obj, '__class__', None) or type(obj)
klass_repr = _safe_getattr(klass, '__repr__', None)
if klass_repr in _baseclass_reprs:
p.text(klass_repr(obj))
else:
# A user-provided repr. Find newlines and replace them with p.break_()
output = _safe_repr(obj)
for idx, output_line in enumerate(output.split('\n')):
if idx:
p.break_()
p.text(output_line)
return True
def warn_format_error(method, self, *args, **kwargs):
"""decorator for warning on failed format call"""
try:
r = method(self, *args, **kwargs)
except Exception as e:
warn("Exception in %s formatter: %s" % (self.format_type, e))
return None
if r is None or isinstance(r, self._return_type) or \
(isinstance(r, tuple) and r and isinstance(r[0], self._return_type)):
return r
else:
warn("%s formatter returned invalid type %s (expected %s) for object: %s" % (
self.format_type, type(r), self._return_type, pretty._safe_repr(args[0])
))
def warn_format_error(method, self, *args, **kwargs):
"""decorator for warning on failed format call"""
try:
r = method(self, *args, **kwargs)
except Exception as e:
warn("Exception in %s formatter: %s" % (self.format_type, e))
return None
if r is None or isinstance(r, self._return_type) or \
(isinstance(r, tuple) and r and isinstance(r[0], self._return_type)):
return r
else:
warn(
"%s formatter returned invalid type %s (expected %s) for object: %s"
% (self.format_type, type(r), self._return_type,
pretty._safe_repr(args[0])))
def __call__(self, obj):
"""Compute the pretty representation of the object."""
if not self.pprint:
return pretty._safe_repr(obj)
else:
# This uses use StringIO, as cStringIO doesn't handle unicode.
stream = StringIO()
# self.newline.encode() is a quick fix for issue gh-597. We need to
# ensure that stream does not get a mix of unicode and bytestrings,
# or it will cause trouble.
printer = pretty.RepresentationPrinter(stream, self.verbose,
self.max_width, unicode_to_str(self.newline),
singleton_pprinters=self.singleton_printers,
type_pprinters=self.type_printers,
deferred_pprinters=self.deferred_printers)
printer.pretty(obj)
printer.flush()
return stream.getvalue()
def __call__(self, obj):
"""Compute the pretty representation of the object."""
if not self.pprint:
return pretty._safe_repr(obj)
else:
# This uses use StringIO, as cStringIO doesn't handle unicode.
stream = StringIO()
# self.newline.encode() is a quick fix for issue gh-597. We need to
# ensure that stream does not get a mix of unicode and bytestrings,
# or it will cause trouble.
printer = pretty.RepresentationPrinter(stream, self.verbose,
self.max_width, unicode_to_str(self.newline),
singleton_pprinters=self.singleton_printers,
type_pprinters=self.type_printers,
deferred_pprinters=self.deferred_printers)
printer.pretty(obj)
printer.flush()
return stream.getvalue()
