Allow mwatt == '0.00' to work.

choppsv1 · Apr 19, 2018 · 0611c83 · 0611c83
1 parent 0552232
commit 0611c83
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diff --git a/README.rst b/README.rst
@@ -2,6 +2,7 @@
 opticalutil
 ===========
 
+Support classes for handling optical power.
 
 master branch status:
 

diff --git a/opticalutil/power.py b/opticalutil/power.py
@@ -193,7 +193,12 @@ def from_mwatt(cls, mwatt):
             return Power(None)
         if not mwatt:
             return Power(None)
-        # Should we do this?
+        try:
+            # Try and convert to float first to catch '0.00' case
+            if not float(mwatt):
+                return Power(None)
+        except ValueError:
+            pass
 
         dBm = D(10, pcontext) * D(mwatt).log10(pcontext)
         dBm = dBm.quantize(SIXPLACES, rounding=ROUND_HALF_EVEN)