def generate_help (self, header=None):
        """Generate help text (a list of strings, one per suggested line of
        output) from the option table for this FancyGetopt object.
        """
        # Blithely assume the option table is good: probably wouldn't call
        # 'generate_help()' unless you've already called 'getopt()'.

        # First pass: determine maximum length of long option names
        max_opt = 0
        for option in self.option_table:
            long = option[0]
            short = option[1]
            l = len(long)
            if long[-1] == '=':
                l = l - 1
            if short is not None:
                l = l + 5                   # " (-x)" where short == 'x'
            if l > max_opt:
                max_opt = l

        opt_width = max_opt + 2 + 2 + 2     # room for indent + dashes + gutter

        # Typical help block looks like this:
        #   --foo       controls foonabulation
        # Help block for longest option looks like this:
        #   --flimflam  set the flim-flam level
        # and with wrapped text:
        #   --flimflam  set the flim-flam level (must be between
        #               0 and 100, except on Tuesdays)
        # Options with short names will have the short name shown (but
        # it doesn't contribute to max_opt):
        #   --foo (-f)  controls foonabulation
        # If adding the short option would make the left column too wide,
        # we push the explanation off to the next line
        #   --flimflam (-l)
        #               set the flim-flam level
        # Important parameters:
        #   - 2 spaces before option block start lines
        #   - 2 dashes for each long option name
        #   - min. 2 spaces between option and explanation (gutter)
        #   - 5 characters (incl. space) for short option name

        # Now generate lines of help text.  (If 80 columns were good enough
        # for Jesus, then 78 columns are good enough for me!)
        line_width = 78
        text_width = line_width - opt_width
        big_indent = ' ' * opt_width
        if header:
            lines = [header]
        else:
            lines = ['Option summary:']

        for option in self.option_table:
            long, short, help = option[:3]
            text = wrap_text(help, text_width)
            if long[-1] == '=':
                long = long[0:-1]

            # Case 1: no short option at all (makes life easy)
            if short is None:
                if text:
                    lines.append("  --%-*s  %s" % (max_opt, long, text[0]))
                else:
                    lines.append("  --%-*s  " % (max_opt, long))

            # Case 2: we have a short option, so we have to include it
            # just after the long option
            else:
                opt_names = "%s (-%s)" % (long, short)
                if text:
                    lines.append("  --%-*s  %s" %
                                 (max_opt, opt_names, text[0]))
                else:
                    lines.append("  --%-*s" % opt_names)

            for l in text[1:]:
                lines.append(big_indent + l)

        # for self.option_table

        return lines

    # generate_help ()
dataset/ETHPy150Open azoft-dev-team/imagrium/env/Lib/distutils/fancy_getopt.py/FancyGetopt.generate_help/original