UnitCalc
A Python Library for doing Scientific/Engineering mathematics!
This library explicity supports the following SI units:
Base Units:
- Ampere
- Candela
- Kilogram
- Meter
- Mol
- Kelvin
- Second
Compound/Complex Units:
- Newton
- Ohm
- Coulomb
- Volt
- Watt
- Joule
- Pascal
Non Si Units:
- Pound/lb
- Ton
- Inch
- Foot
- Mile
- Celcius
- Fahrenheit
- Minute
- Hour
Values can be created with units not explicitly supported by the above units but they will be represented as combination of the 7 base SI units.
Installation:
clone this repository to your machine then execute the following
pip install <path/to/UnitCalc/>
Usage:
1.) Getting Started:
>>> from physics import PhysObjects
>>>
>>> # Create a factory object
>>> phys_factory = PhysObjects()
>>>
>>> # Create an Ampere Unit
>>> A = phys_factory.create(13,"A")
>>> A
13 A
>>> # Create a Dimensionless Unit
>>> no_dim = phys_factory.create(1)
>>> no_dim
12.) Creating SI units with different scales
>>> from physics import PhysObjects
>>> phys_factory = PhysObjects()
>>>
>>> # Create a nanoAmpere
>>> nA = phys_factory.create(13,"A",unit_prefix="nano")
>>> nA
13 nA
>>> # Convert 13nA to Ampere
>>> # Passing None or "" will return an un-prefixed value
>>> A = nA.convert_to_prefix(None)
>>> A
1.3e-08 A3.) Converting between SI and Non-SI units
>>> from physics import PhysObjects
>>> phys_factory = PhysObjects()
>>>
>>> C = phys_factory.create(0,"C")
>>> F = C.convert_to_unit("F")
>>> K = F.convert_to_unit("K")
>>> C
0 C
>>> F
32.0 F
>>> K
273.15 K4.) Maths and conversions
a.) Doubling Temperature
>>> from physics import PhysObjects
>>> phys_factory = PhysObjects()
>>>
>>> # Double the temperature at 0 oC
>>> C = phys_factory.create(0,"C")
>>> double_C = C*2
>>> C
0 C
>>> double_C
273.15 Cb.) Addition/Subtraction
>>> from physics import PhysObjects
>>> phys_factory = PhysObjects()
>>>
>>> inch = phys_factory.create(12,"In")
>>> foot = phys_factory.create(1,"ft")
>>> inch + foot
24 in
>>> foot + inch
2 ft
>>> kg = phys_factory.create(1.2,"kg")
>>> foot + kg
ValueError: Cannot perform addition because the units do not match.c.) Powers
>>> from physics import PhysObjects
>>> phys_factory = PhysObjects()
>>>
>>> mm = phys_factory.create(1,"meter",unit_prefix="mili")
>>> mm**2
1e-06 m²5.) Boolean Operations
>>> from physics import PhysObjects
>>> phys_factory = PhysObjects()
>>>
>>> inch = phys_factory.create(12,"In")
>>> foot = phys_factory.create(1,"ft")
>>> inch == foot
True6.) Constants
>>> from constants import Constants
>>> # All Constants
>>> Constants
Constants:
Boltzmann: 1.380649e-23 m² kg / sec² K
G: 6.6743015e-11 m³ / sec² kg
N0: 6.02214076e+23
Na: 6.02214076e-23 / mol
Planck: 6.62607015e-34 m² kg / sec
R: 8.31446261815324 m² kg / sec² K mol
Rydberg_h: 10967758.329787835 / m
Rydberg_inf: 10973731.557661768 / m
Stefan: 5.6703744191844294e-08 kg / sec³ K⁴
Stefan_Boltzmann: 5.6703744191844294e-08 kg / sec³ K⁴
Wiens: 0.002897771955 m K
alpha: 0.007297352565816523
avogadro_constant: 6.02214076e-23 / mol
avogadro_number: 6.02214076e+23
c: 299792458 m / sec
e: 1.6021766340000001e-19 C
electron_rest_mass: 9.1093837015e-31 kg
elementary_charge: 1.6021766340000001e-19 C
epsilon_0: 8.854187816999999e-12 sec⁴ A² / m³ kg
fine_structure: 0.007297352565816523
g: 9.80665 m / sec²
gas_constant: 8.31446261815324 m² kg / sec² K mol
gravitational_constant: 6.6743015e-11 m³ / sec² kg
h: 6.62607015e-34 m² kg / sec
hbar: 1.0545718176461565e-34 m² kg / sec
k: 1.380649e-23 m² kg / sec² K
m_e: 9.1093837015e-31 kg
m_n: 1.67492749804e-27 kg
m_p: 1.67262192369e-27 kg
mu_0: 1.25e-08 m kg / sec² A²
neutron_rest_mass: 1.67492749804e-27 kg
proton_rest_mass: 1.67262192369e-27 kg
rydberg_h_constant: 10967758.329787835 / m
rydberg_inf_constant: 10973731.557661768 / m
sigma: 5.6703744191844294e-08 kg / sec³ K⁴
speed_of_light: 299792458 m / sec
standard_gravity: 9.80665 m / sec²
wiens_displacement_constant: 0.002897771955 m K
>>>
>>> # Speed of light
>>> Constants.speed_of_light()
299792458 m / sec
>>> Constants.c()
299792458 m / sec
