Myvariant

MyVariant.py client is now a thin wrapper of underlying biothings_client.py package, a universal Python client for all BioThings APIs, including MyVariant.info.

Changed "generator" parameter of getvariants method to "as_generator", just for consistency.

Added caching functions for all query types except "fetch_all" if requests-cache is installed. Can turn request caching on with set_caching(), off with stop_caching(). The cache can be cleared with clear_cache().
Make "fetch_all" compatible with Elasticsearch v2.x scroll changes.
Added a "generator" parameter to getvariants (default False). When True, a generator to all results is returned rather than a list of all results. This requires much less memory for very large queries (eg vcf file annotation).

return None when input vid does not exist for getvariant method.
raise requests.exceptions.HTTPError when invalid status code returned.
new "get_fields" method to search for matching field names.
new "fetch_all" parameter for query method to retrieve large query.

renamed get_hgvs_from_vcf to format_hgvs for clarity.
renamed get_hgvs to format_hgvs_from_vcf for clarity.

getvariants and querymany methods now support an iterator as the input (more memory efficient for a large list)
get_hgvs helper function now takes either filename or file handle and return a generator instead of a list.