David> I realize CSV module has a sniffer but it is something that is
David> limited more or less to delimited files.
Sure. How about:
def sniff(fname):
if open(fname).read(4) == "<xml":
return "xml"
else:
# assume csv - use its sniffer to generate a dialect
return d
Of course, as the number of file formats grows, you'll need to expand the
logic. You can also run the file(1) command and see what it says. I seem
to recall someone asking about the equivalent to file(1) implemented in
Python awhile back.
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Skip Montanaro
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