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Welcome back. You should now be able to write

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a program that reads a text file in CSV format,

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you might get it as a dump from a spreadsheet or a stats program,

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and you should be able to write a text file whose contents are in CSV format.

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You can then import it into a spreadsheet or a stats program.

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CSV, comma separated values.

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So, a joke about commas.

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What is the difference between a cat and a comma?

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Well a cat has claws at the end of its paws,

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and a comma is a pause at the end of a clause,

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which reminds me of another one in the same vein.

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What's the difference between a prince,

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a bald-headed man, a monkey, and an orphan?

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What's the difference between a prince,

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a bald-headed man, a monkey, and an orphan?

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Well, the first is an heir apparent,

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the second has no apparent hair,

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the third has a hairy parent and the last,

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has nearly a parent. See you next time.