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import py
import errno
class Error(EnvironmentError):
__module__ = 'py.error'
def __repr__(self):
return "%s.%s %r: %s " %(self.__class__.__module__,
self.__class__.__name__,
self.__class__.__doc__,
" ".join(map(str, self.args)),
#repr(self.args)
)
def __str__(self):
return "[%s]: %s" %(self.__class__.__doc__,
" ".join(map(str, self.args)),
)
_winerrnomap = {
2: errno.ENOENT,
3: errno.ENOENT,
17: errno.EEXIST,
22: errno.ENOTDIR,
267: errno.ENOTDIR,
5: errno.EACCES, # anything better?
}
# note: 'py.std' may not be imported yet at all, because
# the 'error' module in this file is imported very early.
# This is dependent on dict order.
ModuleType = type(py)
class py_error(ModuleType):
""" py.error lazily provides higher level Exception classes
for each possible POSIX errno (as defined per
the 'errno' module. All such Exceptions derive
from py.error.Error, which itself is a subclass
of EnvironmentError.
"""
Error = Error
def _getwinerrnoclass(cls, eno):
return cls._geterrnoclass(_winerrnomap[eno])
_getwinerrnoclass = classmethod(_getwinerrnoclass)
def _geterrnoclass(eno, _errno2class = {}):
try:
return _errno2class[eno]
except KeyError:
clsname = py.std.errno.errorcode.get(eno, "UnknownErrno%d" %(eno,))
cls = type(Error)(clsname, (Error,),
{'__module__':'py.error',
'__doc__': py.std.os.strerror(eno)})
_errno2class[eno] = cls
return cls
_geterrnoclass = staticmethod(_geterrnoclass)
def __getattr__(self, name):
eno = getattr(py.std.errno, name)
cls = self._geterrnoclass(eno)
setattr(self, name, cls)
return cls
def getdict(self, done=[]):
try:
return done[0]
except IndexError:
for name in py.std.errno.errorcode.values():
hasattr(self, name) # force attribute to be loaded, ignore errors
dictdescr = ModuleType.__dict__['__dict__']
done.append(dictdescr.__get__(self))
return done[0]
__dict__ = property(getdict)
del getdict
error = py_error('py.error', py_error.__doc__)
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