add atm and torr units (#62)

Author: NoureldinYosri

tunits/core/cython/derived_unit_data.pyx

@@ -116,6 +116,8 @@ __OTHER_UNITS = [
     # Pressure.
     DerivedUnitData('psi', 'pounds_per_square_inch', 'Pa', 6894.75729317),
     DerivedUnitData('bar', 'barometric_pressure', 'Pa', 1e5),
+    DerivedUnitData('atm', 'atmospheric_pressure', 'Pa', 101325.0),
+    DerivedUnitData('torr', 'mm_of_mercury', 'Pa', 101325.0/760),
 ]
 
 # Units that aren't technically exact, but close enough for our purposes.

tunits/units.py

@@ -173,6 +173,7 @@
 Tlx = core.default_unit_database.known_units['Tlx']
 Tm = core.default_unit_database.known_units['Tm']
 Tmol = core.default_unit_database.known_units['Tmol']
+torr = core.default_unit_database.known_units['torr']
 Trad = core.default_unit_database.known_units['Trad']
 Ts = core.default_unit_database.known_units['Ts']
 Tsr = core.default_unit_database.known_units['Tsr']
@@ -290,6 +291,7 @@
 attovolt = core.default_unit_database.known_units['attovolt']
 attowatt = core.default_unit_database.known_units['attowatt']
 attoweber = core.default_unit_database.known_units['attoweber']
+atm = core.default_unit_database.known_units['atm']
 avogadro_constant = core.default_unit_database.known_units['avogadro_constant']
 b = core.default_unit_database.known_units['b']
 bar = core.default_unit_database.known_units['bar']
@@ -1397,6 +1399,7 @@
     "Tlx",
     "Tm",
     "Tmol",
+    "torr",
     "Trad",
     "Ts",
     "Tsr",
@@ -1514,6 +1517,7 @@
     "attovolt",
     "attowatt",
     "attoweber",
+    "atm",
     "avogadro_constant",
     "b",
     "bar",

tunits/units_with_dimension.py

@@ -173,6 +173,7 @@
 Tlx = core.Illuminance(core.default_unit_database.known_units['Tlx'])
 Tm = core.Length(core.default_unit_database.known_units['Tm'])
 Tmol = core.Quantity(core.default_unit_database.known_units['Tmol'])
+torr = core.Pressure(core.default_unit_database.known_units['torr'])
 Trad = core.Angle(core.default_unit_database.known_units['Trad'])
 Ts = core.Time(core.default_unit_database.known_units['Ts'])
 Tsr = core.Angle(core.default_unit_database.known_units['Tsr'])
@@ -290,6 +291,7 @@
 attovolt = core.ElectricPotential(core.default_unit_database.known_units['attovolt'])
 attowatt = core.Power(core.default_unit_database.known_units['attowatt'])
 attoweber = core.MagneticFlux(core.default_unit_database.known_units['attoweber'])
+atm = core.Pressure(core.default_unit_database.known_units['atm'])
 avogadro_constant = core.default_unit_database.known_units['avogadro_constant']
 b = core.Area(core.default_unit_database.known_units['b'])
 bar = core.Pressure(core.default_unit_database.known_units['bar'])
@@ -1399,6 +1401,7 @@
     "Tlx",
     "Tm",
     "Tmol",
+    "torr",
     "Trad",
     "Ts",
     "Tsr",
@@ -1516,6 +1519,7 @@
     "attovolt",
     "attowatt",
     "attoweber",
+    "atm",
     "avogadro_constant",
     "b",
     "bar",