Simple taks to optimizing a python script

Job ID: 32765056

Budget: $10 – $30 USD

I have a CSV file with a market calendar, all the days where the market was opened.
The content of the file is that:
2022-01-17
2022-01-14
...

And I have another csv file with a ticker daily data: date, close, low, high, open, vol
I need to fill the days where this ticker dont have trades with the last knowed price.

Sample data are attached.
Related categories: Python NumPy Pandas