Function to find the absolute path of a data file

The ObsPy modules are installed to a custom installation directory. That is the path cannot be predicted. This functions searches for all installed ObsPy modules and checks whether the file is in any of the “tests/data/” or “data/” subdirectories.

Parameters:filename A test file name to which the path should be returned.
Returns:Full path to file.


>>> get_example_file('slist.ascii')  
>>> get_example_file('does.not.exists')  
Traceback (most recent call last):
OSError: Could not find file does.not.exists ...