iMath wrote:
> f = open('UsersInfo.bin','rb')
> while True:
> try:
> usrobj = pickle.load(f)
> except EOFError as e:
> print(e)
> break
> else:
> usrobj.dispuser()
> f.close()
> why print(e) cannot print out any information ？
Because the relevant code in pickle doesn't supply an error message; it's
just
raise EOFError
While you can add the information yourself by subclassing the Unpickler...
class MyUnpickler(pickle.Unpickler):
def __init__(self, file, **kw):
super().__init__(file, **kw)
self.file = file
def load(self):
try:
return super().load()
except EOFError:
raise EOFError("EOFError: Reached end of {}".format(self.file))
with open('UsersInfo.bin','rb') as f:
load = MyUnpickler(f).load
while True:
try:
usrobj = load()
except EOFError as e:
print(e)
break
else:
usrobj.display()
... it might be a good idea to make a feature request on
<http://bugs.python.org>.
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