RubyMarshal
Read and write Ruby-marshalled data. Only basics Ruby data types can be directly read and written, but you can use any custom Python and Ruby types:
float,bool,int,str(mapped torubymarshal.classes.RubyStringif dumped with instance variables),nil(mapped toNonein Python),array(mapped tolist),hash(mapped todict),- symbols and other classes are mapped to specific Python classes.
Installation
pip install rubymarshalUsage
from rubymarshal.reader import loads, load
from rubymarshal.writer import writes, write
with open('my_file', 'rb') as fd:
content = load(fd)
with open('my_file', 'wb') as fd:
write(fd, my_object)
loads(b"\x04\bi\xfe\x00\xff")
writes(-256)You can map custom Ruby types to Python ones:
from rubymarshal.reader import loads
from rubymarshal.classes import RubyObject, registry
class DomainError(RubyObject):
ruby_class_name = "Math::DomainError"
registry.register(DomainError)
loads(b'\x04\x08c\x16Math::DomainError')You can use custom registries instead of the global one:
from rubymarshal.reader import loads
from rubymarshal.classes import RubyObject, ClassRegistry
class DomainError(RubyObject):
ruby_class_name = "Math::DomainError"
registry = ClassRegistry()
registry.register(DomainError)
loads(b'\x04\x08c\x16Math::DomainError', registry=registry)You can use Ruby's symbols:
from rubymarshal.reader import loads
from rubymarshal.writer import writes
from rubymarshal.classes import Symbol
x = Symbol("test")
dump = writes(Symbol("test"))
y = loads(dump)
assert y is xThe default Writer class is customizable to write custom Python classes:
from rubymarshal.writer import writes, Writer
from rubymarshal.classes import Symbol
class Constant:
def __init__(self, name):
self.name = name
class ConstantWriter(Writer):
def write_python_object(self, obj):
if isinstance(obj, Constant):
return self.write(Symbol(obj.name))
super().write_python_object(obj)
dump = writes([Constant("test")], cls=ConstantWriter)
print(dump)Infos
- Code is on github: https://github.com/d9pouces/RubyMarshal
- Documentation is on readthedocs: http://rubymarshal.readthedocs.org/en/latest/
- Tests are on travis-ci: https://travis-ci.org/d9pouces/RubyMarshal
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