Constant package of SCIPY

It is used to provide a value of the constant in data science mathematical operation, Scipy provide the constant package to get the value of all standard constant.

from scipy.constants import pi

import scipy
from scipy.constants import pi
print("sciPy - pi = %.16f" % scipy.constants.pi)
#print(scipy.constants.find())
print(scipy.constants.physical_constants["alpha particle mass"])

Another example:-

import scipy

from scipy.constants import pi

print(pi)

print(scipy.constants.golden)

print(scipy.constants.c)

print(scipy.constants.Avogadro)

print(scipy.constants.find())

print(scipy.constants.physical_constants["alpha particle mass"])

Unit Categories

The units are placed under these categories:

• Metric
• Binary
• Mass
• Angle
• Time
• Length
• Pressure
• Volume
• Speed
• Temperature
• Energy
• Power
• Force

from scipy import constants

print(constants.yotta)    #1e+24

print(constants.zetta)    #1e+21

print(constants.exa)      #1e+18

print(constants.peta)     #1000000000000000.0

print(constants.tera)     #1000000000000.0

print(constants.giga)     #1000000000.0

print(constants.mega)     #1000000.0

print(constants.kilo)     #1000.0

print(constants.hecto)    #100.0

print(constants.deka)     #10.0

print(constants.deci)     #0.1

print(constants.centi)    #0.01

print(constants.milli)    #0.001

print(constants.micro)    #1e-06

print(constants.nano)     #1e-09

print(constants.pico)     #1e-12

print(constants.femto)    #1e-15

print(constants.atto)     #1e-18

print(constants.zepto)    #1e-21

Binary Prefixes:

Return the specified unit in bytes (e.g. kibi returns 1024)

Example

from scipy import constants

print(constants.kibi)    #1024

print(constants.mebi)    #1048576

print(constants.gibi)    #1073741824

print(constants.tebi)    #1099511627776

print(constants.pebi)    #1125899906842624

print(constants.exbi)    #1152921504606846976

print(constants.zebi)    #1180591620717411303424

print(constants.yobi)    #1208925819614629174706176

Mass:

Return the specified unit in kg (e.g. gram returns 0.001)

Example

from scipy import constants

print(constants.gram)        #0.001

print(constants.metric_ton)  #1000.0

print(constants.grain)       #6.479891e-05

print(constants.lb)          #0.45359236999999997

print(constants.pound)       #0.45359236999999997

print(constants.oz)          #0.028349523124999998

print(constants.ounce)       #0.028349523124999998

print(constants.stone)       #6.3502931799999995

print(constants.long_ton)    #1016.0469088

print(constants.short_ton)   #907.1847399999999

print(constants.troy_ounce)  #0.031103476799999998

print(constants.troy_pound)  #0.37324172159999996

print(constants.carat)       #0.0002

print(constants.atomic_mass) #1.66053904e-27

print(constants.m_u)         #1.66053904e-27

print(constants.u)           #1.66053904e-27

Angle:

Return the specified unit in radians (e.g. degree returns 0.017453292519943295)

Example

from scipy import constants

print(constants.degree)     #0.017453292519943295

print(constants.arcmin)     #0.0002908882086657216

print(constants.arcminute)  #0.0002908882086657216

print(constants.arcsec)     #4.84813681109536e-06

print(constants.arcsecond)  #4.84813681109536e-06

Time:

Return the specified unit in seconds (e.g. hour returns 3600.0)

Example

from scipy import constants

print(constants.minute)      #60.0

print(constants.hour)        #3600.0

print(constants.day)         #86400.0

print(constants.week)        #604800.0

print(constants.year)        #31536000.0

print(constants.Julian_year) #31557600.0

Length:

Return the specified unit in meters (e.g. nautical_mile returns 1852.0)

Example

from scipy import constants

print(constants.inch)              #0.0254

print(constants.foot)              #0.30479999999999996

print(constants.yard)              #0.9143999999999999

print(constants.mile)              #1609.3439999999998

print(constants.mil)               #2.5399999999999997e-05

print(constants.pt)                #0.00035277777777777776

print(constants.point)             #0.00035277777777777776

print(constants.survey_foot)       #0.3048006096012192

print(constants.survey_mile)       #1609.3472186944373

print(constants.nautical_mile)     #1852.0

print(constants.fermi)             #1e-15

print(constants.angstrom)          #1e-10

print(constants.micron)            #1e-06

print(constants.au)                #149597870691.0

print(constants.astronomical_unit) #149597870691.0

print(constants.light_year)        #9460730472580800.0

print(constants.parsec)            #3.0856775813057292e+16

Pressure:

Return the specified unit in pascals (e.g. psi returns 6894.757293168361)

Example

from scipy import constants

print(constants.atm)         #101325.0

print(constants.atmosphere)  #101325.0

print(constants.bar)         #100000.0

print(constants.torr)        #133.32236842105263

print(constants.mmHg)        #133.32236842105263

print(constants.psi)         #6894.757293168361

Area:

Return the specified unit in square meters(e.g. hectare returns 10000.0)

Example

from scipy import constants

print(constants.hectare) #10000.0

print(constants.acre)    #4046.8564223999992

Volume:

Return the specified unit in cubic meters (e.g. liter returns 0.001)

Example

from scipy import constants

print(constants.liter)            #0.001

print(constants.litre)            #0.001

print(constants.gallon)           #0.0037854117839999997

print(constants.gallon_US)        #0.0037854117839999997

print(constants.gallon_imp)       #0.00454609

print(constants.fluid_ounce)      #2.9573529562499998e-05

print(constants.fluid_ounce_US)   #2.9573529562499998e-05

print(constants.fluid_ounce_imp)  #2.84130625e-05

print(constants.barrel)           #0.15898729492799998

print(constants.bbl)              #0.15898729492799998

Speed:

Return the specified unit in meters per second (e.g. speed_of_sound returns 340.5)

Example

from scipy import constants

print(constants.kmh)            #0.2777777777777778

print(constants.mph)            #0.44703999999999994

print(constants.mach)           #340.5

print(constants.speed_of_sound) #340.5

print(constants.knot)           #0.5144444444444445

Temperature:

Return the specified unit in Kelvin (e.g. zero_Celsius returns 273.15)

Example

from scipy import constants

print(constants.zero_Celsius)      #273.15

print(constants.degree_Fahrenheit) #0.5555555555555556

Energy:

Return the specified unit in joules (e.g. calorie returns 4.184)

Example

from scipy import constants

print(constants.eV)            #1.6021766208e-19

print(constants.electron_volt) #1.6021766208e-19

print(constants.calorie)       #4.184

print(constants.calorie_th)    #4.184

print(constants.calorie_IT)    #4.1868

print(constants.erg)           #1e-07

print(constants.Btu)           #1055.05585262

print(constants.Btu_IT)        #1055.05585262

print(constants.Btu_th)        #1054.3502644888888

print(constants.ton_TNT)       #4184000000.0

Power:

Return the specified unit in watts (e.g. horsepower returns 745.6998715822701)

Example

from scipy import constants

print(constants.hp)         #745.6998715822701

print(constants.horsepower) #745.6998715822701

Force:

Return the specified unit in newton (e.g. kilogram_force returns 9.80665)

Example

from scipy import constants

print(constants.dyn)             #1e-05

print(constants.dyne)            #1e-05

print(constants.lbf)             #4.4482216152605

print(constants.pound_force)     #4.4482216152605

print(constants.kgf)             #9.80665

print(constants.kilogram_force)  #9.80665