Changes based on feedback

@typemytype changed this to do the try/except only if features are asked for, no need to do it if they aren't

Lib/extractor/formats/opentype.py

@@ -1066,7 +1066,12 @@ def _extractOpenTypeKerningFromKern(source):
 
 
 def extractOpenTypeFeatures(source):
-    from fontFeatures.ttLib import unparse
-    return unparse(source).asFea()
-
-
+    try:
+        from fontFeatures.ttLib import unparse
+        _haveFontFeatures = True
+    except ImportError:
+        _haveFontFeatures = False
+
+    if _haveFontFeatures:
+        return unparse(source).asFea()
+    return ""