How to pickle a function

Asked Jul 10 '22 at 22:45

Active Jul 10 '22 at 22:45

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I know that I can define a function in a Python script and then pickle it. I also know that I can't pickle lambda expressions. Let's say that I defined a function functionA(x, y = 2) and now I would like to create another function (not by defining it using def keyword) functionB which is a functionA but with argument y = 3. I can write

functionB = lambda x: functionA(x, y = 3)

but in that case I can't pickle it. How can I pickle it but without defining a function:

def functionB(x, y = 3):
    return functionA(x, y = y)

asked Jul 10 '22 at 22:45

Jason

1

why is `def`'ing a second function off the table? – Paul H Jul 10 '22 at 22:48
1

Why do you even want to pickle a function? – Keith Jul 10 '22 at 22:48
As an aside, the `lambda` that you propose doesn't actually change the default value; it *sets* a value for that parameter. It is not allowed to override the `y = 3` setting that way. – Karl Knechtel Jul 10 '22 at 22:49

How to pickle a function

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