Python: saving and loading objects and using pickle.
- by Peterstone
Hello, I´m trying to save and load objects using pickle module.
First I declare my objects:
>>> class Fruits:pass
...
>>> banana = Fruits()
>>> banana.color = 'yellow'
>>> banana.value = 30
After that I open a file called 'Fruits.obj'(previously I created a new .txt file and I renamed 'Fruits.obj'):
>>> import pickle
>>> filehandler = open(b"Fruits.obj","wb")
>>> pickle.dump(banana,filehandler)
After do this I close my session and I began a new one and I put the next (trying to access to the object that it supposed to be saved):
file = open("Fruits.obj",'r')
object_file = pickle.load(file)
But I have this message:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python31\lib\pickle.py", line 1365, in load
encoding=encoding, errors=errors).load()
ValueError: read() from the underlying stream did notreturn bytes
I don´t know what to do because I don´t understand this message.
Does anyone know How I can load my object 'banana'?
Thank you!
EDIT:
As some of you have sugested I put:
>>> import pickle
>>> file = open("Fruits.obj",'rb')
There were no problem, but the next I put was:
>>> object_file = pickle.load(file)
And I have error:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python31\lib\pickle.py", line 1365, in load
encoding=encoding, errors=errors).load()
EOFError
