How to make argparse accept "-4^2+5.3*abs(-2-1)/2" string argument?

[Greg Ewing]

>> On 2023-01-22 at 18:19:13 -0800,
>> Jach Feng <jfong at ms4.hinet.net> wrote:
>>> 1) Modify the sys.argv by inserting an item '--' before parsing it, ie.
>>> sys.argv.insert(1, '--')
>>> args = parser.parse_args()

If you do that, you'll never be able to have any actual options, so
using argparse seems like overkill. Just pull the argument out of
argv directly.

-- 
Greg