Какая разница между argparse и optparse? Как перейти с optparse на argparse?

from optparse import OptionParser

from argparse import ArgumentParser

_parser = OptionParser(usage=usage, version=1.0)

parser = ArgumentParser(description=desc)

_parser.add_option(
    '-q', '--query',
    action = 'store',
    type = 'str',               #Specify the type of value to receive
    dest = 'download_date',     #Save destination variable name
    help = 'Word to search'  # --Statement to display when helping
)

parser.add_argument(
    '-q', '--query',
    type = str,         #Specify the type of value to receive
    dest = 'query',     #Save destination variable name
    required = True,    #Required item
    help = 'Word to search' # --Statement to display when helping
)

imgopt.add_argument(
    "--pkgverify-level",
    type="choice",
    choices=["all", "signature", "digest", "none"],
    dest="pkgverify_level",
    default=None,
    help="Configures RPM package verification. Use \"all\" to enforce "
        "trusted GPG signatures and strong digests for every "
        "package. Only affects packages installed during the "
        "%install step."
)

imgopt.add_argument(
    "--pkgverify-level",
    choices=["all", "signature", "digest", "none"],
    dest="pkgverify_level",
    default=None,
    help="Configures RPM package verification. Use \"all\" to enforce "
        "trusted GPG signatures and strong digests for every "
        "package. Only affects packages installed during the "
        "%install step."
)

_options, _args = _parser.parse_args()

args = parser.parse_args()

parser = optparse.OptionParser()

imgopt = optparse.OptionGroup(
    parser,
    "Image options",
    "These options define the created image."
)

imgopt.add_option(
    "--batch",
    type="string",
    dest="batch",
    help="Path or url to batch config file"
)

group = parser.add_argument_group('group')
group.add_argument('--foo', help='foo help')