File write error

[SameerJain901]

Hi! I am quite new to streamlit and I am getting permission error while editing the streamlit theme file and a pickle file where I have some news data stored.

check my app from here: https://share.streamlit.io/sameerjain901/coronavisualizer/visualizer.py
I have a selectbox to select from different themes but it is not working on streamlit-sharing as I do not have permission to edit the toml file.

It works on local system:

[snehankekre]

Hi @SameerJain901, welcome to the Streamlit community!!

I’m sorry that you’re running into permission errors on Streamlit sharing. Here’s how you can fix the errors associated with updating your config.toml file and dumping card_data.pkl to disk.

Pickle:

1. On sharing, all the scripts associated with your app live in the /app/ directory. Pickle can write to this directory

2. Prepend /app/ to the path of your pickle files by editing line 262 and line 496 of visualizer.py to be

   # line 262
   pk.dump(card_data,open('/app/card_data_2.pkl','wb'))
   
   # line 496
   card_data=pk.load(open('/app/card_data_2.pkl','rb'))
   

Theming

1. The error is caused by line 141

   os.remove('.streamlit/config.toml')
   

2. Either remove line 141 or comment it out

3. Uncomment lines 142 and 143 such that your update_theme() function looks like the following:

    def update_theme(primaryColor,backgroundColor,secondaryBackgroundColor,textColor,font):
        # Theme Base
        theme_data=['[theme]\n\n','primaryColor=\"%s\"\n'%(primaryColor),
        'backgroundColor=\"%s\"\n'%(backgroundColor),
        'secondaryBackgroundColor=\"%s\"\n'%(secondaryBackgroundColor),
        'textColor=\"%s\"\n'%(textColor),
        'font=\"%s\"\n'%(font)]
        theme_file=open('.streamlit/config.toml','w+')
        theme_file.writelines(theme_data)
   

Once you make the above changes, and Reboot your app, both the errors should be resolved

Happy Streamlit-ing!
Snehan

[SameerJain901]

Thanks @snehankekre. It is running smoothly. I did not notice that I was deleting the config file.