Hi:
I am puzzled about the following piece of code which attempts to create
a class that can be used as record or struct with a limited set of
allowed attributes that can be set into an instance of the class.
class RecordClass(object):
__slots__ = ["foo"]
def __init__(self, args):
print "Initial slots = ", RecordClass.__slots__
RecordClass.__slots__ = list(args)
print "Final slots = ", RecordClass.__slots__
pass
def new_record(slotlist):
return RecordClass(slotlist)
if __name__ == "__main__":
record1 = new_record(["age", "name", "job"])
record1.age = 27
record1.name = 'Fred'
record1.job = 'Plumber'
record1.salary = 50000
When executed I get:
Initial slots = ['foo']
Final slots = ['age', 'name', 'job']
Traceback (most recent call last):
File "D:\ProgrammingProjects\JustForTesting\recordclasses.py", line
37, in ?
record1.age = 27
AttributeError: 'RecordClass' object has no attribute 'age'
I don't understand why I cannot set an attribute 'age' into record1.
Thanks,
Don.
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