The VSO can be queried in two different ways: the legacy or the standard API. The legacy API tries to mimic the IDL vso_search as closely as possible (and sane for Python), the standard API takes a new approach and allows complex queries to be easily created.
There also exist two different clients for the VSO. The VSOClient is designed for computer programs while InteractiveVSOClient is designed for use in the REPL. InteractiveVSOClient queries the user to provide missing information using the keyboard while VSOClient can be programmed to supply missing information by subclassing and overriding methods.
InteractiveVSOClient also offeres a search method that can be used to do both legacy and standard queries with one method.
A global search and get method is exposed on module level that operate on a default InteractiveVSOClient.
VSOClient.query takes an arbitrary amount of Attrs which are automatically ANDed together for convenience, a | b can be used for OR:
client = vso.VSOClient() result = client.query( vso.attrs.Time((2010, 1, 1), (2010, 1, 1, 1)), vso.attrs.Instrument('eit') | vso.attrs.Instrument('sot') )