add typehints=dict(a=int, b=float, c=string) and fields=['a', 'b', 'c'] to discover

[cpcloud]

These would help when discovering when particular types are known (typehints) as well as when column names are not available (fields)

[cpcloud]

something like

discover(resource('/path/to/file.csv'), fields=list('abc'))
discover(resource('/path/to/file.csv'),
         typehints=dict(d='int32', e='float64', f="string[32, 'A']"),
         fields=list('def'))