How to use the unicodecsv.register_dialect function in unicodecsv

def fix_dialect(dialect):
    if not dialect.doublequote and dialect.escapechar is None:
        dialect.doublequote = True

    if dialect.quoting == unicodecsv.QUOTE_MINIMAL and dialect.quotechar == "'":
        # Python csv's Sniffer seems to detect a wrong quotechar when
        # quoting is minimal
        dialect.quotechar = '"'


class excel_semicolon(unicodecsv.excel):
    delimiter = ';'

unicodecsv.register_dialect("excel-semicolon", excel_semicolon)


if six.PY2:

    def discover_dialect(sample, encoding=None, delimiters=(b",", b";", b"\t", b"|")):
        """Discover a CSV dialect based on a sample size.

        `encoding` is not used (Python 2)
        """
        try:
            dialect = sniffer.sniff(sample, delimiters=delimiters)

        except unicodecsv.Error:  # Couldn't detect: fall back to 'excel'
            dialect = unicodecsv.excel

        fix_dialect(dialect)