DataSource.exists()

Test if path exists.

Test if path exists as (and in this order):

• a local file.
• a remote URL that has been downloaded and stored locally in the DataSource directory.
• a remote URL that has not been downloaded, but is valid and accessible.

Notes

When path is an URL, exists will return True if it?s either stored locally in the DataSource directory, or is a valid remote URL. DataSource does not discriminate between the two, the file is accessible if it exists in either location.