问题
Say I have a set of strings like the following:
"5 m^2"
"17 sq feet"
"3 inches"
"89 meters"
Is there a Python package which will read such strings, convert them to SI, and return the result in an easily-usable form? For instance:
>>> a=dream_parser.parse("17 sq feet")
>>> a.quantity
1.5793517
>>> a.type
'area'
>>> a.unit
'm^2'
回答1:
More recently, pint is a good place to start for most of these.
回答2:
Quantulum will do exactly what you described
Excerpt from its description:
from quantulum import parser
quants = parser.parse('I want 2 liters of wine')
# quants [Quantity(2, 'litre')]
回答3:
Is there an extension for ipython that can do at least part of what you want. It's called ipython-physics
It does store value and units and allows (at least) some basic math. I have never used it myself, so I don't know how easy would be to use in a python script
来源：https://stackoverflow.com/questions/15161012/parse-python-string-for-units