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def limit(self, start_or_stop=None, stop=None, step=None):
"""
Create a new table with fewer rows.
See also: Python's builtin :func:`slice`.
:param start_or_stop:
If the only argument, then how many rows to include, otherwise,
the index of the first row to include.
:param stop:
The index of the last row to include.
:param step:
The size of the jump between rows to include. (`step=2` will return
every other row.)
:returns:
A new :class:`.Table`.
"""
if stop or step:
s = slice(start_or_stop, stop, step)
else:
s = slice(start_or_stop)
rows = self._rows[s]
if self._row_names is not None:
row_names = self._row_names[s]
else:
row_names = None
return self._fork(rows, row_names=row_names)
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