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unitpy.py
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unitpy.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Wed Mar 29 16:01:57 2017
@author: robertgeiger
"""
from sympy import Symbol
class units():
baseunits = {
'tempearture' : {'symbol': Symbol('T'),'unit':['kelvin','k']},
'length' : {'symbol': Symbol('L'),'unit':['meter','m']},
'mass' : {'symbol': Symbol('M'),'unit':['gram','g']},
'current' : {'symbol': Symbol('I'),'unit':['ampere','a']},
'amount' : {'symbol': Symbol('N'),'unit':['mole','mol']},
'time' : {'symbol': Symbol('t'),'unit':['second','sec','s']},
'intensity' : {'symbol': Symbol('J'),'unit':['candela','cd']}
}
u_ref = {
# Temperatures
'f' : { 'names' : ['f','fahrenheit','of','fo'], 'symbol' : Symbol('T')},
'c' : { 'names' : ['c','celsius','oc','co'], 'symbol' : Symbol('T')},
'r' : { 'names' : ['r','rankine','or','ro'], 'symbol' : Symbol('T')},
'k' : { 'names' : ['k','kelvin','ok','ko'], 'symbol' : Symbol('T')},
# Pressure
'psi' : { 'names' : ['psi','lb/in2','lb/in^2','lb/in**2'], 'symbol' : Symbol('M')/ Symbol('L')* Symbol('t')**2},
'atm' : { 'names' : ['atm'], 'symbol' : Symbol('M')/Symbol('L')*Symbol('t')**2},
# Volume Flow Rates
'scfh' : { 'names' : ['scfh','ft3/hr','ft^3/hr','ft**3/hr'], 'symbol' : Symbol('L')**3/Symbol('t')},
'scfm' : { 'names' : ['scfm','ft3/min','ft^3/min','ft**3/min'], 'symbol' : Symbol('L')**3/Symbol('t')},
'slph' : { 'names' : ['slph','liter/hr','l/hr'], 'symbol' : Symbol('L')**3/Symbol('t')},
'slpm' : { 'names' : ['slpm','liter/min','l/min'], 'symbol' : Symbol('L')**3/Symbol('t')},
# Density
'g/l' : {'names' : ['g/l','gram/liter','grams/liter','gram/litre','grams/litre'],'symbol' : Symbol('M')/Symbol('L')**3},
'kg/m3' : {'names' : ['kg/m3','kilogram/m3','kilograms/m3','kilogram/m^3','kilograms/m^3'],'symbol' : Symbol('M')/Symbol('L')**3}
}
dimensionless = {
'radian' : {'factor' : 1.0 , 'names' : ['radians']},
'steradian' : {'factor' : 1.0 , 'names' : ['sr', 'steradians']},
'degree' : {'factor' : 0.01745329251994, 'names' : ['deg', 'degrees']},
'arcminute' : {'factor' : 0.0002908882086657, 'names' : ['arcmin', 'arcminutes', 'arc-minute', 'arc-minutes']},
'arcsecond' : {'factor' : 4.848136811095e-6, 'names' : ['arcsec', 'arcseconds', 'arc-second', 'arc-seconds']},
'pi' : {'factor' : 3.1415926535897931, 'names' : []},
'unity' : {'factor' : 1.0 , 'names' : []},
'zero' : {'factor' : 0 , 'names' : []},
'one' : {'factor' : 1 , 'names' : []},
'two' : {'factor' : 2 , 'names' : []},
'three' : {'factor' : 3 , 'names' : []},
'four' : {'factor' : 4 , 'names' : []},
'five' : {'factor' : 5 , 'names' : []},
'six' : {'factor' : 6 , 'names' : []},
'seven' : {'factor' : 7 , 'names' : []},
'eight' : {'factor' : 8 , 'names' : []},
'nine' : {'factor' : 9 , 'names' : []},
'dozen' : {'factor' : 12.0 , 'names' : []},
'gross' : {'factor' : 144.0 , 'names' : []},
'ten' : {'factor' : 10.0 , 'names' : []},
'twenty' : {'factor' : 20.0 , 'names' : []},
'thirty' : {'factor' : 30.0 , 'names' : []},
'forty' : {'factor' : 40.0 , 'names' : []},
'fifty' : {'factor' : 50.0 , 'names' : []},
'sixty' : {'factor' : 60.0 , 'names' : []},
'seventy' : {'factor' : 70.0 , 'names' : []},
'eighty' : {'factor' : 80.0 , 'names' : []},
'ninety' : {'factor' : 90.0 , 'names' : []},
'hundred' : {'factor' : 100.0 , 'names' : []},
'thousand' : {'factor' : 1000.0 , 'names' : []},
'million' : {'factor' : 1.0e6 , 'names' : []},
'billion' : {'factor' : 1.0e9 , 'names' : []},
'trillion' : {'factor' : 1.0e12 , 'names' : []},
'quadrillion' : {'factor' : 1.0e15 , 'names' : []},
'quintillion' : {'factor' : 1.0e18 , 'names' : []},
'percent' : {'factor' : 0.01 , 'names' : ['%', 'percent']},
'tenth' : {'factor' : 0.1 , 'names' : []},
'hundredth' : {'factor' : 0.01 , 'names' : []},
'thousandth' : {'factor' : 0.001 , 'names' : []},
'millionth' : {'factor' : 1.0e-6 , 'names' : []},
'billionth' : {'factor' : 1.0e-9 , 'names' : []},
'trillionth' : {'factor' : 1.0e-12 , 'names' : []},
'quadrillionth': {'factor' : 1.0e-15 , 'names' : []},
'quintillionth': {'factor' : 1.0e-18 , 'names' : []},
}
prefix = {
'Y' : {'factor' : 1.0e24 , 'names' : ['Y','yotta']},
'Z' : {'factor' : 1.0e21 , 'names' : ['Z','zetta']},
'E' : {'factor' : 1.0e18 , 'names' : ['E','exa']},
'P' : {'factor' : 1.0e15 , 'names' : ['P', 'peta']},
'T' : {'factor' : 1.0e12 , 'names' : ['T', 'tera']},
'G' : {'factor' : 1.0e9 , 'names' : ['G', 'giga']},
'M' : {'factor' : 1.0e6 , 'names' : ['M', 'mega']},
'k' : {'factor' : 1000.0 , 'names' : ['k', 'kilo']},
'h' : {'factor' : 100.0 , 'names' : ['h', 'hecto']},
'da' : {'factor' : 10.0 , 'names' : ['da', 'deca', 'deka', 'deca']},
'd' : {'factor' : 0.1 , 'names' : ['d', 'deci']},
'c' : {'factor' : 0.01 , 'names' : ['c', 'centi']},
'm' : {'factor' : 0.001 , 'names' : ['m', 'milli']},
'u' : {'factor' : 1.0e-6 , 'names' : ['u', 'micro']},
'n' : {'factor' : 1.0e-9 , 'names' : ['n', 'nano']},
'p' : {'factor' : 1.0e-12 , 'names' : ['p', 'pico']},
'f' : {'factor' : 1.0e-15 , 'names' : ['f', 'femto']},
'a' : {'factor' : 1.0e-18 , 'names' : ['a', 'atto']},
'z' : {'factor' : 1.0e-21 , 'names' : ['z', 'zepto']},
'y' : {'factor' : 1.0e-24 , 'names' : ['y', 'yocto']}
}
simpleunits = {
'length' : {
'm' : {'factor' : 1.0 , 'names' : ['m', 'meters','meter', 'metres','metre']},
'angs' : {'factor' : 1.0e-10 , 'names' : ['ang', 'angstroms']},
'ft' : {'factor' : 0.3048 , 'names' : ['ft', 'feet']},
'in' : {'factor' : 0.0254 , 'names' : ['in', 'inches']},
'mi' : {'factor' : 1609.344 , 'names' : ['mi', 'miles']},
'nautical-mile' : {'factor' : 1852.0 , 'names' : ['nm', 'nauticalmiles', 'nauticalmile', 'nautical-miles']},
'astronomical-unit' : {'factor' : 1.49598e11 , 'names' : ['au']},
'ly' : {'factor' : 9.46e15 , 'names' : ['ly', 'light-years', 'lightyear', 'lightyears']},
'parsec' : {'factor' : 3.083e16 , 'names' : ['parsecs']},
'fathom' : {'factor' : 1.8054 , 'names' : ['fathoms']},
'yard' : {'factor' : 0.9144 , 'names' : ['yd', 'yards']},
'rod' : {'factor' : 5.0292 , 'names' : ['rods']},
'mil' : {'factor' : 0.0000254 , 'names' : ['mils']},
'furlong' : {'factor' : 201.168 , 'names' : ['furlongs']}
},
'mass' : {
'kg' : {'factor' : 1.0 , 'names' : ['kg', 'kilograms']},
'hg' : {'factor' : 0.1 , 'names' : ['hg', 'hectograms']},
'dag' : {'factor' : 0.01 , 'names' : ['dag', 'dekagrams', 'decagram', 'decagrams']},
'g' : {'factor' : 0.001 , 'names' : ['gm', 'grams']},
'dg' : {'factor' : 0.0001 , 'names' : ['dg', 'decigrams']},
'cg' : {'factor' : 0.00001 , 'names' : ['cg', 'centigrams']},
'mg' : {'factor' : 1.0e-6 , 'names' : ['mg', 'milligrams']},
'ug' : {'factor' : 1.0e-9 , 'names' : ['ug', 'micrograms']},
'metric-ton' : {'factor' : 1000.0 , 'names' : ['metric-tons', 'tonne', 'tonnes']},
'pound' : {'factor' : 0.45359237 , 'names' : ['lb', 'lbs','pound', 'pounds']},
'slug' : {'factor' : 14.593902937 , 'names' : ['slugs']},
'atomic-mass-unit' : {'factor' : 1.6605402e-27 , 'names' : ['amu', 'atomic-mass-units']},
},
'time' : {
's' : {'factor' : 1.0 , 'names' : ['s','sec','secs','second','seconds']},
'min' : {'factor' : 60 , 'names' : ['min', 'minutes']},
'hr' : {'factor' : 3600 , 'names' : ['hr', 'hours']},
'day' : {'factor' : 86400 , 'names' : ['days']},
'wk' : {'factor' : 604800, 'names' : ['wk', 'weeks']},
'fortnight' : {'factor' : 1209600, 'names' : ['fortnights']},
'month' : {'factor' : 2629728, 'names' : ['mon', 'months']},
'yr' : {'factor' : 31556736, 'names' : ['yr', 'years']},
'century' : {'factor' : 3155673600, 'names' : ['century','centuries']}
},
'current' : {
'amp' : {'factor' : 1.0, 'names' : ['A','a','amp','amps','ampere','amperes']}
},
'temperature' : {
'k' : {'factor' : 1.0, 'names' : ['k','K','kelvin','kelvins']},
'r' : {'factor' : 5/9, 'names' : ['r','R','rankine','rankines']}
},
'luminosity' : {
'cd' : {'factor' : 1.0, 'names' : ['cd','candela','candelas']}
},
'amount' : {
'mol' : {'factor' : 1.0, 'names' : ['mol','mole','moles']}
},
'money' : {
'$' : {'factor' : 1.0, 'names' : ['dollar','dollars','$', 'buck','bucks']}
}
}
derivedunits = {
'frequency' : {
'hz' : {'factor' : 1/simpleunits['time']['s']['factor'], 'names' : ['hz','Hz','1/s','hertz']}
},
'area' : {
},
'volume' : {
'l' : {'factor' : 1000, 'names' : ['l','liter','liters','litre','litres']}
},
'volumetric flow rate' : {
},
}
unit_list = []
for k,v in simpleunits.items():
for k2,v2 in v.items():
unit_list.append(v2['names'])
unit_list = [j for i in unit_list for j in i]
unit_list.sort()
def __init__(self,u=''):
for k,v in self.baseunits.items():
if u.lower() in v['unit']:
print('Base Unit')
'''
Use utility functions to add units to list
'''
self.simpleunits['length'].update(self.addPrefix('m',self.simpleunits['length']['m']['factor'],self.simpleunits['length']['m']['names']))
self.simpleunits['time'].update(self.addPrefix('s',self.simpleunits['time']['s']['factor'],self.simpleunits['time']['s']['names']))
self.simpleunits['current'].update(self.addPrefix('amp',self.simpleunits['current']['amp']['factor'],self.simpleunits['current']['amp']['names']))
self.simpleunits['amount'].update(self.addPrefix('mol',self.simpleunits['amount']['mol']['factor'],self.simpleunits['amount']['mol']['names']))
self.derivedunits['frequency'].update(self.addPrefix('hz',self.derivedunits['frequency']['hz']['factor'],self.derivedunits['frequency']['hz']['names']))
self.derivedunits['area'].update(self.contProd('length'))
self.derivedunits['volume'].update(self.addPrefix('l',self.derivedunits['volume']['l']['factor'],self.derivedunits['volume']['l']['names']))
self.derivedunits['volume'].update(self.contProd('length',3))
'''
Utility Functions
'''
def addPrefix(self,unit,factor=1,basename=''):
if basename == '':
basename = unit
d = {}
for k,v in self.prefix.items():
d[k+unit] = {'factor' : v['factor']*factor,'names':[x1+x2 for x1 in v['names'] for x2 in basename]}
return d
#Function for multiplying simpleunits
def contProd(self,base,num=2):
try:
d = {}
for k,v in self.simpleunits[base].items():
d[k+str(num)] = {'factor': v['factor']**num,'names':[k+str(num),k+'^'+str(num),k+'**'+str(num)]}
return d
except:
print('Base not found.')
return 0
def prod(self, b1, b2):
pass
def factor(self,unit):
if type(unit) in [float, int]:
return unit
# Check if it is a simple unit
match = {}
for k,v in self.simpleunits.items():
for k2,v2 in v.items():
if unit in v2['names']:
match[unit]=v2
# Check if it is a derived unit
for k,v in self.derivedunits.items():
for k2,v2 in v.items():
if unit in v2['names']:
match[unit]=v2
if len(match) == 0:
print('Unit not found')
return 0
if len(match) == 1:
return match[unit]['factor']
elif len(match) > 1:
print('Multiple units found')
return 0
return 0
'''
Can accept
convert(qty1,qty2)
convert(qty1,to)
convert(x,from,to)
'''
def convert(self,*args):
# Input flexibility... pull out value,from, and to
if len(args) == 3:
x = args[0]
f = args[1]
t = args[2]
elif len(args) == 2:
if isinstance(args[0],qty):
x = args[0].v
f = args[0].u
if isinstance(args[1],qty):
t = args[1].u
elif type(args[1]) == str:
t = args[1]
else:
print('Invalid type to convert to!')
t = '' # default
else:
print('Invalid type to convert from!')
return 0
else:
print('Invalid Input!')
return 0
# Handle Temperature Conversion
celsius = ['c','C','celsius']
kelvin = ['k','K','kelvin','kelvins']
fahr = ['f','F','fahrenheit','Fahrenheit']
rankine = ['r','R','rankine','Rankine']
if f in fahr:
if t in rankine:
return x+459.67
elif t in celsius:
return (x-32)*5/9
elif t in kelvin:
return (x+459.67)*5/9
else:
print('Unknown "To" Unit')
return x
if f in celsius:
if t in fahr:
return (x*9/5)+32
elif t in kelvin:
return x+273.15
elif t in rankine:
return (x+273.15)*9/5
else:
print('Unknown "To" Unit')
return x
if f in kelvin:
if t in rankine:
return x*9/5
elif t in fahr:
return x*9/5-459.67
elif t in celsius:
return x-273.15
else:
print('Unknown "To" Unit')
return x
if f in rankine:
if t in celsius:
return (x-491.67)*5/9
elif t in fahr:
return x-459.67
elif t in kelvin:
return x*5/9
else:
print('Unknown "To" Unit')
return x
ff = self.factor(f)
ft = self.factor(t)
try:
f = ff/ft
except:
print('error converting units: ',ff,ft)
f = 1
return x*f
'''
{
# Temperature Conversion
'f->r' : x+459.67,
'f->c' : (x-32)*5/9.,
'f->k' : (x+459.67)*5/9.,
'c->f' : (x*9/5.)+32,
'c->k' : x+273.15,
'c->r' : (x+273.15)*9/5,
'k->r' : x*9/5.,
'k->f' : x*9/5.-459.67,
'k->c' : x-273.15,
'r->c' : (x-491.67)*5/9.,
'r->f' : x-459.67,
'r->k' : x*5/9.,
#Pressure
'psi->atm' : x/14.7,
'atm->psi' : x*14.7,
# Volume Flow Rates Conversion
'scfh->scfm' : x/60.,
'scfh->slph' : x*28.32,
'scfh->slpm' : x*28.32/60,
'scfm->scfh' : x*60.,
'scfm->slpm' : x*28.32,
'scfm->slph' : x*28.32*60.,
'slpm->scfh' : x/28.32*60.,
'slpm->scfm' : x/28.32,
'slpm->slph' : x*60.,
'slph->slpm' : x/60.,
'slph->scfh' : x/28.32,
'slph->scfm' : x/28.32/60,
# Density
'g/l->kg/m3' : x,
'kg/m3->g/l' : x,
# Default
'' : x
}[f+'->'+t]
'''
def unitExists(self,u):
if u in self.unit_list:
return True
return False
def unitMatch(self,a,b):
# This is poor... make it better
for k1,v1 in self.simpleunits.items():
for k,v in v1.items():
if a in v['names']:
s_a = k1
if b in v['names']:
s_b = k1
try:
if s_a == s_b:
return True
return False
except:
print('Unrecognized unit!')
return False
def strToSymbols(self,s):
pass