'Converts the given item to an octal string.
The ``item``, with an optional ``base``, is first converted to an
integer using `Convert To Integer` internally. After that it
is converted to an octal number (base 8) represented as a
string such as ``775``.
The returned value can contain an optional ``prefix`` and can be
required to be of minimum ``length`` (excluding the prefix and a
possible minus sign). If the value is initially shorter than
the required length, it is padded with zeros.
Examples:
| ${result} = | Convert To Octal | 10 |            |          | # Result is 12      |
| ${result} = | Convert To Octal | -F | base=16    | prefix=0 | # Result is -017    |
| ${result} = | Convert To Octal | 16 | prefix=oct | length=4 | # Result is oct0020 |
See also `Convert To Integer`, `Convert To Binary` and `Convert To Hex`.'

def convert_to_octal(self, item, base=None, prefix=None, length=None):

    return self._convert_to_bin_oct_hex(item, base, prefix, length, 'o')
