added PSU to psu units (#239)

kthyng · web-flow · commit ed36d29675e5 · 2021-06-25T17:02:49.000-05:00
diff --git a/cf_xarray/units.py b/cf_xarray/units.py
@@ -41,7 +41,7 @@
     "degrees_east = degree = degrees_E = degreesE = degree_east = degree_E = degreeE"
 )
 units.define("@alias meter = gpm")
-units.define("practical_salinity_unit = [] = psu")
+units.define("practical_salinity_unit = [] = psu = PSU")
 
 # Enable pint's built-in matplotlib support
 try:

Original file line number	Diff line number	Diff line change
`@@ -41,7 +41,7 @@`
`41`	`41`	`"degrees_east = degree = degrees_E = degreesE = degree_east = degree_E = degreeE"`
`42`	`42`	`)`
`43`	`43`	`units.define("@alias meter = gpm")`
`44`		`-units.define("practical_salinity_unit = [] = psu")`
	`44`	`+units.define("practical_salinity_unit = [] = psu = PSU")`
`45`	`45`
`46`	`46`	`# Enable pint's built-in matplotlib support`
`47`	`47`	`try:`