在我的应用程序中,我有一个这样的解析器:
description = ("Cluster a matrix using bootstrap resampling or "
"Bayesian hierarchical clustering.")
sub_description = ("Use these commands to cluster data depending on "
"the algorithm.")
parser = argparse.ArgumentParser(description=description, add_help=False)
subparsers = parser.add_subparsers(title="Sub-commands",
description=sub_description)
parser.add_argument("--no-logfile", action="store_true", default=False,
help="Don't log to file, use stdout")
parser.add_argument("source", metavar="FILE",
help="Source data to cluster")
parser.add_argument("destination", metavar="FILE",
help="File name for clustering results")
然后我添加了一系列像这样的子解析器(使用函数,因为它们很长):
setup_pvclust_parser(subparsers, parser)
setup_native_parser(subparsers, parser)
这些调用(以一个为例):
def setup_pvclust_parser(subparser, parent=None):
pvclust_description = ("Perform multiscale bootstrap resampling "
"(Shimodaira et al., 2002)")
pvclust_commands = subparser.add_parser("bootstrap",
description=pvclust_description, parents=[parent])
pvclust_commands.add_argument("-b", "--boot", type=int,
metavar="BOOT",
help="Number of permutations",
default=100)
# Other long list of options...
pvclust_commands.set_defaults(func=cluster_pvclust) # The function doing the processing
问题是命令行的解析以某种方式失败,我确定这是我的错,在某个地方。运行时的示例:
my_program.py bootstrap --boot 10 --no-logfile test.txt test.pdf
my_program.py bootstrap: error: too few arguments
好像解析有点错误。如果我在 subparser 调用中删除 parents=[] ,这种行为就会消失,但我宁愿避免它,因为它会产生大量重复。
编辑:在呼叫解决部分问题subparsers
后移动呼叫。add_argument
但是,现在解析器无法正确解析子命令:
my_program.py bootstrap --boot 100 --no-logfile test.txt test.pdf
my_program.py: error: invalid choice: 'test.txt' (choose from 'bootstrap', 'native')