Creating an empty Pandas DataFrame, and then filling it

In this example I am using this pandas doc to create a new data frame and then using append to write to the newDF with data from oldDF. If I have to keep appending new data into this newDF from more than one oldDFs, I just use a for loop to iterate over pandas.DataFrame.append() Note: append() is deprecated since version 1.4.0. Use concat().

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