def build(cls, obj, res=None, ctx=None):
if res is None:
res = b''
if ctx is None:
ctx = {}
if cls._struct_fields:
for name, struct in cls._struct_fields:
try:
if name in obj:
res += struct.build(obj[name], ctx=ctx)
else:
res += struct.build(None, ctx=ctx)
except:
print("Context at time of failure:", ctx)
raise
else:
res = cls._build(obj, ctx=ctx)
return res
def build(cls, obj, res=None, ctx=None):
if res is None:
res = b''
if ctx is None:
ctx = {}
if cls._struct_fields:
for name, struct in cls._struct_fields:
try:
if name in obj:
res += struct.build(obj[name], ctx=ctx)
else:
res += struct.build(None, ctx=ctx)
except:
print("Context at time of failure:", ctx)
raise
else:
res = cls._build(obj, ctx=ctx)
return res