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Returns a safe copy if the value argument is mutable, otherwise returns the original argument. If the feedback keyword argument is True, then a tuple is returned containing the resulting argument, and whether or not is was mutable.

This class allows you to retrieve a companies current stock quote from Yahoo Finance, as well as current news feed entries for that company.

Copies files from nested folders into one source, flat directory.

Python example set-up script from python.org docs.