draft of SCPI_PROPERTY to simplify set/query operations

1 files changed, 34 insertions, 0 deletions

diff --git a/qolab/hardware/scpi.py b/qolab/hardware/scpi.py
index b4111b3..42f25b4 100644
--- a/qolab/hardware/scpi.py
+++ b/qolab/hardware/scpi.py
@@ -22,6 +22,30 @@ def response2numStr(strIn, firstSeparator=None, unit=None):
         numberString = rstr
     return (prefix, numberString, unit)
 
+class SCPI_PROPERTY(property):
+    """ Overrides property class and makes it suitable for SCPI set and query notation """
+    def __init__(self, scpi_prfx=None, ptype=str, doc=None):
+        super().__init__(fget=self.get_scpi, fset=self.set_scpi)
+        self.scpi_prfx = scpi_prfx
+        self.ptype = ptype
+        self.__doc__ = doc
+
+    def get_scpi(self, owner):
+        print(f'{self.scpi_prfx}?')
+        return self.ptype( '443' )
+
+    def set_scpi(self, owner, val):
+        print(f'{self.scpi_prfx} {val}')
+
+    def __repr__(self):
+        s = [ f'{self.__class__.__name__}(' ]
+        sargs= []
+        sargs.append( f'scpi_prfx={self.scpi_prfx}')
+        sargs.append( f'ptype={self.ptype}')
+        sargs.append( f'doc={self.__doc__}')
+        sargs =', '.join(sargs)
+        s = ''.join( [ f'{self.__class__.__name__}(' , sargs, ')' ] )
+        return s
 
 class SCPIinstr:
     """ Basic class which support SCPI commands """
@@ -82,3 +106,13 @@ class SCPIinstr:
         self.write("*WAI")
 
 
+if __name__ == '__main__': 
+    class DummyInstrument():
+        def fz(self):
+            """ I am  fz """
+            return 34
+        x = SCPI_PROPERTY(scpi_prfx='SETX', ptype=str, doc='property X')
+        y = SCPI_PROPERTY(scpi_prfx='SETY', ptype=int, doc='property Y')
+
+    c= DummyInstrument()
+