The csv module is used to read and write files consisting of comma-separated values (CSV). A CSV file consists of rows of text, each row consisting of values separated by a delimiter character, typically a comma (,) or a tab. Here’s an example:
Blues,Elwood,"1060 W Addison","Chicago, IL 60613","B263-1655-2187",116,56
Variants of this format commonly occur when working with databases and spreadsheets. For instance, a database might export tables in CSV format, allowing the tables to be read by other programs. Subtle complexities arise when fields contain the delimiter character. For instance, in the preceding example, one of the fields contains a comma and must be placed in quotes.
reader(csvfile [, dialect [, **fmtparams])
Returns a reader ...