python/expr.py

print(__file__ , "begin python expressions")
def e(f):
    v = eval(f)
    print(f + ' ==> ' + str(v) + ': ' + str(type(v)))

e("'a' and 3")
e("'a' or 3")
e("'' and 3")
e("'' or 3")
e("not 234")