python examples added

python/Query.gf

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+abstract Query = {
+
+flags startcat = Query ;
+
+cat
+  Query ;
+  Kind ;
+  Property ;
+  Term ;
+  Element ;
+
+fun
+  QWhich   : Kind -> Property -> Query ;     -- which numbers are prime
+  QWhether : Term -> Property -> Query ;     -- is any number prime
+  QWhat    : Element          -> Query ;     -- what is the factorial of 10
+
+  TAll : Kind -> Term ;                      -- all numbers
+  TAny : Kind -> Term ;                      -- any number
+  TElement : Element -> Term ;               -- 42  
+
+  PAnd : Property -> Property -> Property ;  -- even and prime
+  POr  : Property -> Property -> Property ;  -- even or odd
+  PNot : Property -> Property ;              -- not prime
+
+  KProperty : Property -> Kind -> Kind ;     -- even number
+
+-- lexicon
+
+  KNumber : Kind ;
+
+  EInteger : Int -> Element ;
+  PEven, POdd, PPrime : Property ;
+  PDivisible : Term -> Property ;
+  PSmaller, PGreater, PEqual : Term -> Property ;  
+  PBetween : Term -> Term -> Property ;  
+
+  EFactorial : Element -> Element ;
+  ESum, EProduct, EMinus, EDivided : Element -> Element -> Element ;
+
+}