Creates a pxweb query object from either a list with named values, a json query file or json query string. See examples below.
Usage
pxweb_query(x)
# S3 method for class 'character'
pxweb_query(x)
# S3 method for class 'json'
pxweb_query(x)
# S3 method for class 'pxweb_query'
pxweb_query(x)
# S3 method for class 'list'
pxweb_query(x)
# S3 method for class 'response'
pxweb_query(x)
# S3 method for class 'pxweb_explorer'
pxweb_query(x)