我正在使用外部python模块，该模块不是我编写的，因此无法更改。这个称为magnum（http://micromagnum.informatik.uni-hamburg.de）的模块处理所有可选的命令行参数。这里有一个例子来说明这种行为：
script1.py
#!/usr/bin/env python
import magnum
执行脚本会产生：
>>> ./script1.py -h
[WARNING] - Python Imaging Library not found!
[WARNING] - -> This means that the ImageShapeCreator and related classes are not available!
[ INFO] - Imported FFTW wisdom from file
Usage: scipt1.py [options]
Options:
--version show program's version number and exit
-h, --help show this help message and exit
Hardware options:
Options that control which hardware is used.
-g GPU_ID enable GPU processing (using 32-bit accuracy) on cuda
device GPU_ID. The simulator will fall back to CPU
mode if it was not compiled with CUDA support or when
no CUDA capable graphics cards were detected.
-G GPU_ID enable GPU processing (using 64-bit accuracy) on cuda
device GPU_ID. TODO: Describe fallback behaviour.
-t NUM_THREADS, --threads=NUM_THREADS
enable CPU multithreading with NUM_THREADS (1..64)
threads. This parameter instructs the fftw library to
use NUM_THREADS threads for computing FFTs.
Logging options:
Options related to logging and benchmarking.
-l LEVEL, --loglevel=LEVEL
set log level (0:Debug, 1:Info, 2:Warn, 4:Error,
5:Critical), default is Debug (0).
--prof Log profiling info at program exit.
Parameter sweep options:
These options have only an effect when the simulation script uses a
Controller object to sweep through a parameter range.
-p RANGE, --param-range=RANGE
select parameter set to run, e.g. --param-range=0,64
to run sets 0 to 63.
--print-num-params print number of sweep parameters to stdout and exit.
--print-all-params print all sweep parameters to stdout and exit.
Miscellanous options:
--on_io_error=MODE Specifies what to do when an i/o error occurs when
writing an .omf/.vtk file. 0: Abort (default), 1:
Retry a few times, then abort, 2: Retry a few times,
then pause and ask for user intervention
现在，我想编写一个小的脚本，该脚本带有自己的命令行参数，然后使用magnum模块执行一些小的计算。我想使用argparse解析参数。但是，argparse的优先级似乎比此外部模块的参数处理低，并且我自己的参数无法识别：
script2.py
#!/usr/bin/env python
import argparse
import magnum
parser = argparse.ArgumentParser(
description='TEST')
parser.add_argument('--x',
help='test_arg')
args = parser.parse_args()
print args.x
调用它：
>>>./scrip2.py --x 3
[WARNING] - Python Imaging Library not found!
[WARNING] - -> This means that the ImageShapeCreator and related classes are not available!
[ INFO] - Imported FFTW wisdom from file
Usage: test.py [options]
test.py: error: no such option: --x
我在大酒瓶之前或之后导入argparse都没有关系。如果我不导入大酒瓶，则argparse可以工作：
script3.py
#!/usr/bin/env python
import argparse
parser = argparse.ArgumentParser(
description='TEST')
parser.add_argument('--x',
help='test_arg')
args = parser.parse_args()
print args.x
执行它会产生：
>>>./scrip2.py --x 3
3
我的问题是：如何在不编辑magnum的情况下停止magnum的命令行参数处理？
虽然我认为没有任何“好的”解决方案，但您可以通过猴子补丁argparse使之成为nop：
class EmptyParser():
def parse_args():
return
... (more redirects for add_argument)
argparse.ArgumentParser = EmptyParser
import magnum
另外，您可以将导入的numnum包装在一个函数中，并通过该函数创建一个接口，并在magnum解析它们之前创建参数。
def magnum(param1, param2):
sys.argv = [param1, '--x', param2]
import magnum
不过，这两种方法都是超级hacky。
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