1.5.1.0 quanta.map

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quanta.map - Function

1.5.1 list known unit names and constants

Description

map lists the known mapping of units and constants. It has a single argument, which can be a coded string (no-case, minimax match):

all: all of the following units (not constants): also the default
Prefix: known decimal prefixes
SI: known SI units
Customary: a set of customary units known to programs
User: units defined by the user
Constants: known constants (note: only ’const’, ’Const’, ’constants’ and ’Constants’ recognised).

Arguments


Inputs
v	type of information to list - coded string
	allowed:	string
	Default:	all

Returns
string

Example

"""
#
print "\t----\t map Ex 1 \t----"
print qa.map(’pre’) # list decimal prefixes
#        == Prefix ==== 20 ====
#        E         (exa)                        1e+18
#        G         (giga)                       1000000000
#        M         (mega)                       1000000
#        P         (peta)                       1e+15
#        T         (tera)                       1e+12
#        Y         (yotta)                      1e+24
#        Z         (zetta)                      1e+21
#        a         (atto)                       1e-18
#        c         (centi)                      0.01
#        d         (deci)                       0.1
#        da        (deka)                       10
#        f         (femto)                      1e-15
#        h         (hecto)                      100
#        k         (kilo)                       1000
#        m         (milli)                      0.001
#        n         (nano)                       1e-09
#        p         (pico)                       1e-12
#        u         (micro)                      1e-06
#        y         (yocto)                      1e-24
#        z         (zepto)                      1e-21
print qa.map(’Constants’) # list known constants
#        == Constants ====
#        pi    3.14..                    3.14159
#        ee    2.71..                    2.71828
#        c     light vel.                2.99792e+08 m/s
#        G     grav. const               6.67259e-11 N.m2/kg2
#        h     Planck const              6.62608e-34 J.s
#        HI    HI line                   1420.41 MHz
#        R     gas const                 8.31451 J/K/mol
#        NA    Avogadro #                6.02214e+23 mol-1
#        e     electron charge           1.60218e-19 C
#        mp    proton mass               1.67262e-27 kg
#        mp_me mp/me                     1836.15
#        mu0   permeability vac.         1.25664e-06 H/m
#        eps0  permittivity vac.         1.60218e-19 C
#        k     Boltzmann const           1.38066e-23 J/K
#        F     Faraday const             96485.3 C/mol
#        me    electron mass             9.10939e-31 kg
#        re    electron radius           2.8179e-15 m
#        a0    Bohr’s radius             5.2918e-11 m
#        R0    solar radius              6.9599e+08 m
#        k2    IAU grav. const^2         0.000295912 AU3/d2/S0
#
"""

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