Execute python code online using eval and compile

In the same way that you type:

A,D = 1,4 

A+D

: 5

eval('A+D')
: 5 

you can type:

eval('B+Y',{'B':3,'Y':7})
: 10

or, using compile, boost the efficiency in a loop (15 times faster):

c = compile('bool(x%2)','','eval')
for i in range(5):
  print eval(c,{'x':i})
: False, True, False, True, False