Fix the issue #13 by wrapping the codes with a main()

[jimbozhang]

for #13 and lhotse-speech/lhotse#126

[qindazhu]

Thanks, merging.

[danpovey]

Thanks, Junbo!! First commit!! (Apart from the ones I merged indirectly in initial commit).

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On Mon, Nov 16, 2020 at 12:10 PM Haowen Qiu ***@***.***> wrote: Merged #14 <#14> into master. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#14 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAZFLOZ5FRFIGQECR6NJBOLSQCQ3TANCNFSM4TWVEKRA> .