Provides feedback on any differences between your installed version of Altair and the version this package supports.
If the supported Altair version is different from your installed version, this function will act according to where the difference in the version numbers:
major version leads to an error
minor version leads to a warning
patch version leads to a message
If there is no difference:
quiet = FALSE, success message showing version-numbers
quiet = TRUE, no message
To install the supported version into a Python environment
NULL, called for side-effects
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## Not run: # not run because it requires Python check_altair() ## End(Not run)
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