In addition, you can convert all the sheets in one pass by specifing a %d or a %s format specifier in the output file name: $ python ssconverter.py file1.xls file1-%d.csv $ python ssconverter.py file1 ...

now you know how to open CSV files in Python! And with that, you’ve dabbled in your first bit of JSON development and even a bit of data science. Feel proud! What are you going to do with this ...