Can't name a parameter "filename"?

[Seanny123]

On Windows 10, I can't seem to change the "filename" parameter in the following script.

import pytry

class Simple(pytry.Trial):
    def params(self):
        self.param('first number', x=1)
        self.param('second number', y=1)
        self.param('operation to compute', op='plus')
        self.param('the filename', filename="weights.npz")

    def evaluate(self, p):
        print(p.filename)
        if p.op == 'plus':
            result = p.x + p.y
        if p.op == 'minus':
            result = p.x - p.y

        return dict(result=result)

However, if I change the parameter name to fn everything works fine.

import pytry

class Simple(pytry.Trial):
    def params(self):
        self.param('first number', x=1)
        self.param('second number', y=1)
        self.param('operation to compute', op='plus')
        self.param('the filename', fn="weights.npz")

    def evaluate(self, p):
        print(p.fn)
        if p.op == 'plus':
            result = p.x + p.y
        if p.op == 'minus':
            result = p.x - p.y

        return dict(result=result)

Any ideas why this might be happening?

[jgosmann]

Because of this line?

[tcstewar]

Argh, yes, I need a better way of handling this case.... this is due to me trying to get the command line parser to do things it's not quite happy with.... I should quickly add a warning if you try to make a filename parameter..... sorry!

[tcstewar]

I've changed that internal parameter to _trial_filename, so that makes it less likely for this problem to happen.... I'd still like to have it throw an error message if you happen to use that, though... 8920397