import theano
import theano.tensor as T

# creates 2 (symbolic) Theano variables; the strings in the constructors are only for output purposes
x = T.scalar('x')
y = T.scalar('y')

# combine the variables to an expression; here, simply an addition
expr = x+y

# create a Theano function
fn = theano.function([x,y], expr)

# call the Theano function
result = fn(0.4, 0.7)

# print results to stdout
print('%s = %g'%(theano.pp(expr), result))