Slider does not work with dates older than 1st february 1970

[beautiful_blood]

Hello guys, I tried to deploy a custom slider in my streamlit app and what happens is very strange, the slider works with dates after 1st of February 1970, but when an older date is passed it gives the following error:

The code of the properly working slider bar is (note: gp.m2_usa is a DataFrame imported from other file)

format = 'MMM DD, YYYY'  # format output
        start_date = gp.m2_usa.index[132].date() #Here the start date is 1970-02-01
        end_date = gp.m2_usa.index[-1].date() #Here the end date is 2021-06-01
        slider = st.slider('Select date', min_value=start_date, value=end_date, max_value=end_date, format=format)

Here the slider works properly

But if I choose just one older index as in this code:

format = 'MMM DD, YYYY'  # format output
        start_date = gp.m2_usa.index[131].date() #Here the start date is 1970-01-01
        end_date = gp.m2_usa.index[-1].date() #Here the end date is 2021-06-01
        slider = st.slider('Select date', min_value=start_date, value=end_date, max_value=end_date, format=format)

It raises the following error:

Thank you in advance for all your help!

[Charly_Wargnier]

Hi @beautiful_blood

Something seems to be wrong with your min_value variable.

Can you please share the related code, so I can try to debug on my machine?

Thanks
Charly

[beautiful_blood]

First of all thank you very much for your help!

I uploaded the code with the mistake to my repo in order you maybe can clone it and make a quicker debug!

Please, find it here: https://github.com/Serrat96/moneyprintersgobrr

[Charly_Wargnier]

Thanks!

By the way, have you checked that error:

https://www.google.com/search?q=errno+22+invalid+argument+datetime&oq=erno22&aqs=chrome.2.69i57j0i13l9.2708j1j7&sourceid=chrome&ie=UTF-8

[beautiful_blood]

I’ve been investigating and as far as I can see the problem is the conversion from “human date” to “epoch timestamp”. It seems that in 1970-01-01 00:00:00 the conversion to “epoch timestamp” returns zero:

And for older dates returns negative values. It seems that the conversor is unable (I don’t know for what reason) to work with zero or negative values of “epoch timestamp”. If for example i go back one day the time is negative as you can see in this picture:

I will keep investigating. I don’t know what’s “epoch timestamp” and what’s the problem with it being zero or negative.

Hope we can find a solution soon!

[beautiful_blood]

Ok. As far as I can see Windows is unable to work with zero or negative “epoch timestamp”. The only thing I can think of is, as I see you @Charly_Wargnier are Streamlit staff is to contact with Streamlit developers in order to make the necessary changes to avoid the slider working with that “epoch timestamp” time format…

In other operative systems as Mac or Linux, the OS is capable to work with that negative “epoch timestamp” but it seems Windows can’t…

Maybe there’s another easier and simple solution, but at the moment this is the conclusion I got. In case the Streamlit team has a better solution I would be very pleased of implement it.

Thank you very much for all your time. At the moment, instead of the slider, I will make a date selector with st.date_input as it seems has no problem working with older than 1970-01-01 dates.

[Charly_Wargnier]

Thanks @beautiful_blood

I’ll share with Devs now.

Best,
Charly

[beautiful_blood]

Thank you for all your time and interest in the issue!

Hope to hear from you the developer’s response if possible!

Best wishes for all of you!

[beautiful_blood]

Hello @Charly_Wargnier just FYI, I tried the code on a MacBook and it works perfectly. So a 100% it’s a Windows problem.

Thank you very much for all your time and attention!

[Charly_Wargnier]

You’re very welcome!

Glad you managed to make it work by switching platform.

Happy Streamlitin’!

Best,
Charly