---
url: "https://vueda.dev/v3/reference/api/py/vueda.cli/NoExitArgumentParser.md"
title: "NoExitArgumentParser"
---

# NoExitArgumentParser

## Overview

Object for parsing command line strings into Python objects.

Keyword Arguments:
    - prog -- The name of the program (default:
        ``os.path.basename(sys.argv[0])``)
    - usage -- A usage message (default: auto-generated from arguments)
    - description -- A description of what the program does
    - epilog -- Text following the argument descriptions
    - parents -- Parsers whose arguments should be copied into this one
    - formatter_class -- HelpFormatter class for printing help messages
    - prefix_chars -- Characters that prefix optional arguments
    - fromfile_prefix_chars -- Characters that prefix files containing
        additional arguments
    - argument_default -- The default value for all arguments
    - conflict_handler -- String indicating how to handle conflicts
    - add_help -- Add a -h/-help option
    - allow_abbrev -- Allow long options to be abbreviated unambiguously
    - exit_on_error -- Determines whether or not ArgumentParser exits with
        error info when an error occurs

## `error` {#error}

error(message: string)

Prints a usage message incorporating the message to stderr and
exits.

If you override this in a subclass, it should not return -- it
should either exit or raise an exception.

### Signature {#error-signature}

`error(self, message)`

#### Parameters {#error-parameters}

| Name | Type | Required | Default | Description |
| --- | --- | --- | --- | --- |
| self |  | yes |  |  |
| <span id="error-param-message">message</span> |  | yes |  |  |

### Source {#error-source}

`server/vueda/cli.py:56`

## Source

`server/vueda/cli.py:55`