Pysimplegui: sg.In() , sg.FilesBrowse() reads Browse button as input value

[DKatarakis]

After updating to latest version seems the code for taking file inputs doesn't work anymore

event, (filename,) = sg.Window('Get filename example'). Layout([[sg.Text('Filename')], [sg.Input(), sg.FileBrowse()], [sg.OK(), sg.Cancel()] ]).Read()

It produces ValueError: too many values to unpack (expected 1).
Upon investigating a bit it seems that in 3.39.0 the Browse button originating from FileBrowse() is read as an input. Downgrading to 3.29.0 fixed the issue. Tested with FileInput() as well.

[nngogol]

Everything is working fine. Just don't write ALL-IN-ONE-LINE code.

Now.

It produces ValueError: too many values to unpack (expected 1).
It's not a PySimpleGUI problem, @DKatarakis.

Here is your code in normal form:

import PySimpleGUI as sg

layout = [
    [sg.Text('Filename')],
    [sg.Input(), sg.FileBrowse()],
    [sg.OK(), sg.Cancel()]
]


window = sg.Window('Simple App, Really simple.', layout)

while True:
    event, values = window.Read()
    if event is None or event == 'Exit': break

    print(event, values)

    if event == 'Button1':
        pass
    if event == 'Button2':
        pass
    if event == 'Button3':
        pass


window.Close()

[fsmosca]

The old version returns value as a list. The new version returns value as a dictionary. This is what I tried.

Textbox value = c:\files\a.txt

A. psg v3.28

e, v = window.Read()
print(v)
['c:/files/a.txt']

B. psg v3.37

e, v = window.Read()
print(v)
{0: 'c:/files/a.txt', 'Browse': 'c:/files/a.txt'}

The following would cause a ValueError in the new version as indicated by @DKatarakis
e, (v,) = window.Read()

[MikeTheWatchGuy]

The problem is that Buttons started to return values too. This created an extra entry and because it's a button it switched the return values over to a dictionary.

If you reference v[0] it will give you your value (same as a list), but it's held in a dictionary.

I'm puzzled why the button is returning a value now. Lemme read the release notes and see if I can determine what the purpose was. I have a feeling it's due to something with the calendar widget or other specialty button.

[DKatarakis]

The old version returns value as a list. The new version returns value as a dictionary. This is what I tried.

Textbox value = c:\files\a.txt

A. psg v3.28

e, v = window.Read()
print(v)
['c:/files/a.txt']

B. psg v3.37

e, v = window.Read()
print(v)
{0: 'c:/files/a.txt', 'Browse': 'c:/files/a.txt'}

The following would cause a ValueError in the new version as indicated by @DKatarakis
e, (v,) = window.Read()

Yes indeed. I apologize for not specifying properly. Thanks for your input.

[MikeTheWatchGuy]

Upon further examination, there was a change a while back to Button return values across all 4 ports. This was a fundamental change to buttons. They now have return values. This poses a real problem for applications that attempt to "unpack" the results as it's not a list.

I'll discourage direct unpacking in the Documentation. You can access the return values as if the values were a list using [], you just can't unpack them directly.

Sorry about this!

_Breaking existing code upon upgrading is a cardinal sin to me so I'm really very sorry._ You'll need to modify your code access the returned values in 2 steps instead of 1.

[MikeTheWatchGuy]

Your 1-line program became 2 I'm afraid

event, values = sg.Window('Get filename example'). Layout([[sg.Text('Filename')], [sg.Input(), sg.FileBrowse()], [sg.OK(), sg.Cancel()] ]).Read()
filename = values[0]