How to use the pycodestyle.expand_indent function in pycodestyle

elif (
        (blank_lines > top_level_lines + 1) or
        (indent_level and blank_lines == method_lines + 1)
            ):
        yield 0, "E303 too many blank lines (%d)" % blank_lines
    elif pycodestyle.STARTSWITH_TOP_LEVEL_REGEX.match(logical_line):
        if indent_level:
            if not (blank_before or previous_indent_level < indent_level or
                    pycodestyle.DOCSTRING_REGEX.match(previous_logical)):
                ancestor_level = indent_level
                nested = False
                # Search backwards for a def ancestor or tree root (top level).
                for line in lines[line_number - 2::-1]:
                    if (
                        line.strip() and
                        pycodestyle.expand_indent(line) < ancestor_level
                            ):
                        ancestor_level = pycodestyle.expand_indent(line)
                        nested = line.lstrip().startswith('def ')
                        if nested or ancestor_level == 0:
                            break
                if nested:
                    yield 0, "E306 expected 1 blank line before a " \
                        "nested definition, found 0"
                else:
                    yield 0, "E301 expected 1 blank line, found 0"
        elif blank_before != top_level_lines:
            yield 0, "E302 expected %s blank lines, found %d" % (
                top_level_lines, blank_before)
    elif (
        logical_line and
        not indent_level and

# This is for purposes of speeding up E121 (GitHub #90).
                not last_line.rstrip().endswith(',')
            ):
                # Allow to line up tokens.
                indent_chances[start[1]] = text

        last_token_multiline = (start[0] != end[0])
        if last_token_multiline:
            rel_indent[end[0] - first_row] = rel_indent[row]

        last_line = line

    if (
        indent_next and
        not last_line_begins_with_multiline and
        pycodestyle.expand_indent(line) == indent_level + DEFAULT_INDENT_SIZE
    ):
        pos = (start[0], indent[0] + 4)
        desired_indent = indent_level + 2 * DEFAULT_INDENT_SIZE
        if visual_indent:
            yield (pos, 'E129 {0}'.format(desired_indent))
        else:
            yield (pos, 'E125 {0}'.format(desired_indent))

last_line_begins_with_multiline = False
    for token_type, text, start, end, line in tokens:

        newline = row < start[0] - first_row
        if newline:
            row = start[0] - first_row
            newline = (not last_token_multiline and
                       token_type not in (tokenize.NL, tokenize.NEWLINE))
            last_line_begins_with_multiline = last_token_multiline

        if newline:
            # This is the beginning of a continuation line.
            last_indent = start

            # Record the initial indent.
            rel_indent[row] = pycodestyle.expand_indent(line) - indent_level

            # Identify closing bracket.
            close_bracket = (token_type == tokenize.OP and text in ']})')

            # Is the indent relative to an opening bracket line?
            for open_row in reversed(open_rows[depth]):
                hang = rel_indent[row] - rel_indent[open_row]
                hanging_indent = hang in valid_hangs
                if hanging_indent:
                    break
            if hangs[depth]:
                hanging_indent = (hang == hangs[depth])

            visual_indent = (not close_bracket and hang > 0 and
                             indent_chances.get(start[1]))

(indent_level and blank_lines == method_lines + 1)
            ):
        yield 0, "E303 too many blank lines (%d)" % blank_lines
    elif pycodestyle.STARTSWITH_TOP_LEVEL_REGEX.match(logical_line):
        if indent_level:
            if not (blank_before or previous_indent_level < indent_level or
                    pycodestyle.DOCSTRING_REGEX.match(previous_logical)):
                ancestor_level = indent_level
                nested = False
                # Search backwards for a def ancestor or tree root (top level).
                for line in lines[line_number - 2::-1]:
                    if (
                        line.strip() and
                        pycodestyle.expand_indent(line) < ancestor_level
                            ):
                        ancestor_level = pycodestyle.expand_indent(line)
                        nested = line.lstrip().startswith('def ')
                        if nested or ancestor_level == 0:
                            break
                if nested:
                    yield 0, "E306 expected 1 blank line before a " \
                        "nested definition, found 0"
                else:
                    yield 0, "E301 expected 1 blank line, found 0"
        elif blank_before != top_level_lines:
            yield 0, "E302 expected %s blank lines, found %d" % (
                top_level_lines, blank_before)
    elif (
        logical_line and
        not indent_level and
        blank_before != top_level_lines and
        previous_unindented_logical_line.startswith(('def ', 'class '))

last_line_begins_with_multiline = False
    for token_type, text, start, end, line in tokens:

        newline = row < start[0] - first_row
        if newline:
            row = start[0] - first_row
            newline = (not last_token_multiline and
                       token_type not in (tokenize.NL, tokenize.NEWLINE))
            last_line_begins_with_multiline = last_token_multiline

        if newline:
            # This is the beginning of a continuation line.
            last_indent = start

            # Record the initial indent.
            rel_indent[row] = pycodestyle.expand_indent(line) - indent_level

            # Identify closing bracket.
            close_bracket = (token_type == tokenize.OP and text in ']})')

            # Is the indent relative to an opening bracket line?
            for open_row in reversed(open_rows[depth]):
                hang = rel_indent[row] - rel_indent[open_row]
                hanging_indent = hang in valid_hangs
                if hanging_indent:
                    break
            if hangs[depth]:
                hanging_indent = (hang == hangs[depth])

            visual_indent = (not close_bracket and hang > 0 and
                             indent_chances.get(start[1]))

last_line_begins_with_multiline = False
    for token_type, text, start, end, line in tokens:

        newline = row < start[0] - first_row
        if newline:
            row = start[0] - first_row
            newline = (not last_token_multiline and
                       token_type not in (tokenize.NL, tokenize.NEWLINE))
            last_line_begins_with_multiline = last_token_multiline

        if newline:
            # This is the beginning of a continuation line.
            last_indent = start

            # Record the initial indent.
            rel_indent[row] = pycodestyle.expand_indent(line) - indent_level

            # Identify closing bracket.
            close_bracket = (token_type == tokenize.OP and text in ']})')

            # Is the indent relative to an opening bracket line?
            for open_row in reversed(open_rows[depth]):
                hang = rel_indent[row] - rel_indent[open_row]
                hanging_indent = hang in valid_hangs
                if hanging_indent:
                    break
            if hangs[depth]:
                hanging_indent = (hang == hangs[depth])

            visual_indent = (not close_bracket and hang > 0 and
                             indent_chances.get(start[1]))

last_line_begins_with_multiline = False
    for token_type, text, start, end, line in tokens:

        newline = row < start[0] - first_row
        if newline:
            row = start[0] - first_row
            newline = (not last_token_multiline and
                       token_type not in (tokenize.NL, tokenize.NEWLINE))
            last_line_begins_with_multiline = last_token_multiline

        if newline:
            # This is the beginning of a continuation line.
            last_indent = start

            # Record the initial indent.
            rel_indent[row] = pycodestyle.expand_indent(line) - indent_level

            # Identify closing bracket.
            close_bracket = (token_type == tokenize.OP and text in ']})')

            # Is the indent relative to an opening bracket line?
            for open_row in reversed(open_rows[depth]):
                hang = rel_indent[row] - rel_indent[open_row]
                hanging_indent = hang in valid_hangs
                if hanging_indent:
                    break
            if hangs[depth]:
                hanging_indent = (hang == hangs[depth])

            visual_indent = (not close_bracket and hang > 0 and
                             indent_chances.get(start[1]))