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# ----------------------------------------------------------------------------
# Copyright (c) 2013--, scikit-bio development team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file LICENSE.txt, distributed with this software.
# ----------------------------------------------------------------------------
import abc
class SkbioObject(metaclass=abc.ABCMeta):
"""Abstract base class defining core API common to all scikit-bio objects.
Public scikit-bio classes should subclass this class to ensure a common,
core API is present. All abstract methods and properties defined here must
be implemented in subclasses, otherwise they will not be instantiable.
"""
@abc.abstractmethod
def __str__(self):
raise NotImplementedError
class ElasticLines:
"""Store blocks of content separated by dashed lines.
Each dashed line (separator) is as long as the longest content
(non-separator) line.
"""
def __init__(self):
self._lines = []
self._separator_idxs = []
self._max_line_len = -1
def add_line(self, line):
line_len = len(line)
if line_len > self._max_line_len:
self._max_line_len = line_len
self._lines.append(line)
def add_lines(self, lines):
for line in lines:
self.add_line(line)
def add_separator(self):
self._lines.append(None)
self._separator_idxs.append(len(self._lines) - 1)
def to_str(self):
separator = "-" * self._max_line_len
for idx in self._separator_idxs:
self._lines[idx] = separator
return "\n".join(self._lines)
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