string2function.py

# First method to run a function from string
# here we use the dir method to get the available functions in django
# and we know that the 7-th result in the array is the function get_version() since
# I have tested it, but it can be any other
import django
test = dir(django)
print "\nFirst example is running function from django called %s" % test[7]
print "result: %s" % django.__getattribute__(test[7])()

# Second method to run a function from string
# We define a method and then use it, but it can be again any other string
# just there is a need of Exception since we usually we don't know if this
# method exists
def calc(i,j):
    return i + j
    
print "\nSecond example of running function giving the string name in eval method"
print "result: %s" % eval('calc')(2,4)

# Third method to run a function from full string
# Here we write the whole call as a string and pass it ot exec
# It's not so great, but is flexible witch is cool
string_function = 'print "hello world"'
print "\nThird example of running a function with the exec method"
print "result: "
exec string_function