On the previous thread, Rickey wrote:
> Python SHOULD be that language we do this with. It is awesome in every other
> way. But if it isn't DEAD SIMPLE to use units in python, it won't happen.
I agree, being dead simple to use is of critical importance. Not only that, but
there are a number of modules and packages that already exist that would need
an update to support units natively. NumPy and SciPy of course, but also
Matplotlib, Pandas. Even argparse would need to be updated (which is one I have
to use a lot, fortunately not with negative values):
```
>>> import re, argparse
>>> meters = lambda x : float(re.sub(r'm','',x))
>>> parser = argparse.ArgumentParser()
>>> parser.add_argument("-l", "--length", dest='length', type=meters)
_StoreAction(option_strings=['-l', '--length'], dest='length', nargs=None,
const=None, default=None, type=<function <lambda> at 0x7fafb8f95c10>,
choices=None, help=None, metavar=None)
>>> parser.parse_args("-l -12".split())
Namespace(length=-12.0)
>>> parser.parse_args("-l -12m".split())
usage: [-h] [-l LENGTH]
: error: argument -l/--length: expected one argument
```
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