python · terryjreedy · May 7, 2023 · May 7, 2023
@@ -345,21 +345,22 @@ def _format_usage(self, usage, actions, groups, prefix):
                def get_lines(parts, indent, prefix=None):
                    lines = []
                    line = []
+                    indent_length = len(indent)
                    if prefix is not None:
                        line_len = len(prefix) - 1
                    else:
-                        line_len = len(indent) - 1
+                        line_len = indent_length - 1
                    for part in parts:
                        if line_len + 1 + len(part) > text_width and line:
                            lines.append(indent + ' '.join(line))
                            line = []
-                            line_len = len(indent) - 1
+                            line_len = indent_length - 1
                        line.append(part)
                        line_len += len(part) + 1
                    if line:
                        lines.append(indent + ' '.join(line))
                    if prefix is not None:
-                        lines[0] = lines[0][len(indent):]
+                        lines[0] = lines[0][indent_length:]
                    return lines

                # if prog is short, follow it with optionals or positionals