[docs]def get_name(mixed):
try:
return mixed.__name__
except AttributeError:
return type(mixed).__name__
class Wrapper:
def __init__(self, wrapped):
self.wrapped = wrapped
@property
def __name__(self):
return getattr(self.wrapped, '__name__', getattr(type(self.wrapped), '__name__', repr(self.wrapped)))
name = __name__
[docs]class ValueHolder:
"""
Decorator holding a value in a given memory adress, effectively allowing to "hold" even an immutable typed value as the state of a
node, allowing different actors to mutate it durably.
For the sake of concistency, all operator methods have been implemented (see https://docs.python.org/3/reference/datamodel.html) or
at least all in a certain category, but it feels like a more correct method should exist, like with a getattr-something on the
value. Let's see later.
"""
def __init__(self, value):
self._value = value
@property
def value(self):
# XXX deprecated
return self._value
[docs] def get(self):
return self._value
[docs] def set(self, new_value):
self._value = new_value
def __bool__(self):
return bool(self._value)
def __eq__(self, other):
return self._value == other
def __ne__(self, other):
return self._value != other
def __repr__(self):
return repr(self._value)
def __lt__(self, other):
return self._value < other
def __le__(self, other):
return self._value <= other
def __gt__(self, other):
return self._value > other
def __ge__(self, other):
return self._value >= other
def __add__(self, other):
return self._value + other
def __radd__(self, other):
return other + self._value
def __iadd__(self, other):
self._value += other
return self
def __sub__(self, other):
return self._value - other
def __rsub__(self, other):
return other - self._value
def __isub__(self, other):
self._value -= other
return self
def __mul__(self, other):
return self._value * other
def __rmul__(self, other):
return other * self._value
def __imul__(self, other):
self._value *= other
return self
def __matmul__(self, other):
return self._value @ other
def __rmatmul__(self, other):
return other @ self._value
def __imatmul__(self, other):
self._value @= other
return self
def __truediv__(self, other):
return self._value / other
def __rtruediv__(self, other):
return other / self._value
def __itruediv__(self, other):
self._value /= other
return self
def __floordiv__(self, other):
return self._value // other
def __rfloordiv__(self, other):
return other // self._value
def __ifloordiv__(self, other):
self._value //= other
return self
def __mod__(self, other):
return self._value % other
def __rmod__(self, other):
return other % self._value
def __imod__(self, other):
self._value %= other
return self
def __divmod__(self, other):
return divmod(self._value, other)
def __rdivmod__(self, other):
return divmod(other, self._value)
def __pow__(self, other):
return self._value ** other
def __rpow__(self, other):
return other ** self._value
def __ipow__(self, other):
self._value **= other
return self
def __lshift__(self, other):
return self._value << other
def __rlshift__(self, other):
return other << self._value
def __ilshift__(self, other):
self._value <<= other
return self
def __rshift__(self, other):
return self._value >> other
def __rrshift__(self, other):
return other >> self._value
def __irshift__(self, other):
self._value >>= other
return self
def __and__(self, other):
return self._value & other
def __rand__(self, other):
return other & self._value
def __iand__(self, other):
self._value &= other
return self
def __xor__(self, other):
return self._value ^ other
def __rxor__(self, other):
return other ^ self._value
def __ixor__(self, other):
self._value ^= other
return self
def __or__(self, other):
return self._value | other
def __ror__(self, other):
return other | self._value
def __ior__(self, other):
self._value |= other
return self
def __neg__(self):
return -self._value
def __pos__(self):
return +self._value
def __abs__(self):
return abs(self._value)
def __invert__(self):
return ~self._value
def __len__(self):
return len(self._value)
def __contains__(self, item):
return item in self._value
def __getitem__(self, item):
return self._value[item]
def __setitem__(self, key, value):
self._value[key] = value
def __getattr__(self, item):
return getattr(self._value, item)
[docs]def get_attribute_or_create(obj, attr, default):
try:
return getattr(obj, attr)
except AttributeError:
setattr(obj, attr, default)
return getattr(obj, attr)
