Source code for sas.sasgui.plottools.convert_units

"""
    Convert units to strings that can be displayed
    This is a cleaned up version of unitConverter.py
"""
from __future__ import print_function

import re
import string

[docs]def convert_unit(power, unit): """ Convert units to strings that can be displayed """ if power != 0: if string.find(unit, "^") != -1: # if the unit contains a powerer ^ toks = re.split("\^", unit) if string.find(toks[0], "/") != -1 or \ string.find(toks[0], "-") != -1: if power == 1: unit = unit else: unit = "(" + unit + ")" + "^{" + str(power) + "}" else: if string.find(toks[1], "{") != -1: # if found a { find_power_toks = re.split("{", toks[1]) if string.find(find_power_toks[1], "}") != -1: # found } unit_toks = re.split("}", find_power_toks[1]) if string.find(unit_toks[0], ".") != -1: powerer = float(unit_toks[0]) * power elif string.find(unit_toks[0], "/") != -1: power_toks = re.split("/", unit_toks[0]) powerer = power * int(power_toks[0])\ / int(power_toks[1]) else: powerer = int(unit_toks[0]) * power if powerer == 1.0: unit = toks[0] elif powerer == 0.5: unit = toks[0] + "^{1/2}" elif powerer == -0.5: unit = toks[0] + "^{-1/2}" else: unit = toks[0] + "^{" + str(powerer) + "}" else: raise ValueError, "missing } in unit expression" else: # no powerer if power != 1: unit = "(" + unit + ")" + "^{" + str(power) + "}" else: raise ValueError, "empty unit ,enter a powerer different from zero" return unit
if __name__ == "__main__": # pylint: disable=invalid-name # Input -> new scale -> Output unit1 = "A^{-1} " # x A^{-1} unit2 = "A" # x A unit3 = "A" # x^2 A^{2} unit4 = "A " # 1/x A^{-1} unit5 = "A^{0.5} " # x^2 A unit9 = "m^{1/2}" # x^2 m # If you don't recognize the pattern, give up # and just put some parentheses around the unit and write the transoformation: unit6 = "m/s" # x^2 (m/s)^{2} unit7 = "m/s^{2}" # 1/x (m/s^{2})^{-1} unit8 = "m/s^{4}" # x^2 (m/s^{4})^{2} print("this unit1 %s ,its powerer %s , and value %s" % (unit1, 1, convert_unit(1, unit1))) print("this unit2 %s ,its powerer %s , and value %s" % (unit2, 1, convert_unit(1, unit2))) print("this unit3 %s ,its powerer %s , and value %s" % (unit3, 2, convert_unit(2, unit3))) print("this unit4 %s ,its powerer %s , and value %s" % (unit4, -1, convert_unit(-1, unit4))) print("this unit5 %s ,its powerer %s , and value %s" % (unit5, 2, convert_unit(2, unit5))) print("this unit6 %s ,its powerer %s , and value %s" % (unit6, 2, convert_unit(2, unit6))) print("this unit7 %s ,its powerer %s , and value %s" % (unit7, -1, convert_unit(-1, unit7))) print("this unit8 %s ,its powerer %s , and value %s" % (unit8, 2, convert_unit(2, unit8))) print("this unit9 %s ,its powerer %s , and value %s" % (unit9, 2, convert_unit(2, unit9)))