Why do I get "Pickle - EOFError: Ran out of input" reading an empty file?

I am getting an interesting error while trying to use Unpickler.load(), here is the source code:

    open(target, 'a').close()
    scores = {};
    with open(target, "rb") as file:
        unpickler = pickle.Unpickler(file);
        scores = unpickler.load();
        if not isinstance(scores, dict):
            scores = {};

Here is the traceback:

    Traceback (most recent call last):
    File "G:\python\pendu\user_test.py", line 3, in <module>:
        save_user_points("Magix", 30);
    File "G:\python\pendu\user.py", line 22, in save_user_points:
        scores = unpickler.load();
    EOFError: Ran out of input

The file I am trying to read is empty. How can I avoid getting this error, and get an empty variable instead?

I would check that the file is not empty first:

    import os

    scores = {} # scores is an empty dict already

    if os.path.getsize(target) > 0:      
        with open(target, "rb") as f:
            unpickler = pickle.Unpickler(f)
            # if file is not empty scores will be equal
            # to the value unpickled
            scores = unpickler.load()

Also open(target, 'a').close() is doing nothing in your code and you don't need to use ;.

From: stackoverflow.com/q/24791987

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