Skip to main content

Parse an arythmic formula from a string

Project description

A formula parser for python.

Copyright (C) 2017 Lars van de Kerkhof

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.

what it does

Parses simple arythmetic formula’s containing variables. Can then be used to compute values resolving the variables from a context object.

>>> from argparse import Namespace as KeyedObject
>>> from formulaparser import Formula
>>>
>>> context = KeyedObject()
>>> context.four = 4
>>> context.three = 3
>>> deepercontext = KeyedObject()
>>> deepercontext.ten = 10
>>> deepercontext.twelve = 12
>>> context.nextlevel = deepercontext
>>>
>>> Formula("((1 + 2 + 3) + 4 + (3 + 7)) + 5").calculate_value()
25
>>> Formula("4!").calculate_value()
24
>>> Formula("3.287 / 6").calculate_value()
0.5478333333333333
>>> Formula("2 ^ 8").calculate_value()
256
>>> Formula("4 - (-4)").calculate_value()
8
>>> Formula("(4 * 6) - 8 + 7 - 4 + 3").calculate_value()
22
>>> Formula("((1 + four + 3) + nextlevel.ten + (3 + 7)) + 5").calculate_value(context)
33
>>> Formula("((four!) - 6) / nextlevel.twelve").calculate_value(context)
1.5
>>> Formula("2 ^ three").calculate_value(context)
8
>>> Formula("nextlevel.twelve - (-four)").calculate_value(context)
16
>>> Formula("(four * 6) - nextlevel.ten + 7 - 4 + 3").calculate_value(context)
20

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Source Distribution

formulaparser-0.0.1.tar.gz (15.9 kB view details)

Uploaded Source

File details

Details for the file formulaparser-0.0.1.tar.gz.

File metadata

File hashes

Hashes for formulaparser-0.0.1.tar.gz
Algorithm Hash digest
SHA256 090c9cbc3a91d914b2be59b5cd29e80f21ca170ff8272fc6da9c10af2abf5855
MD5 76d11c2344f62e7619f182549c9bfecb
BLAKE2b-256 ff4228b9be2ee5ed92fa2f6bb5169cc16ad21f929371410c038b89c8508b75a7

See more details on using hashes here.

Supported by

AWS AWS Cloud computing and Security Sponsor Datadog Datadog Monitoring Fastly Fastly CDN Google Google Download Analytics Microsoft Microsoft PSF Sponsor Pingdom Pingdom Monitoring Sentry Sentry Error logging StatusPage StatusPage Status page