I am wondering how to pass a function into an array in python? -

for example have code error says:

typeerror: 'function' object not iterable 

my code:

def initialpopulation(numberofanimals, length):     pop = []     in xrange(numberofanimals):         pop.append(individual(length))     return pop  graded=[zip(oneanimalsearch(radius,listsum(x),turnnum,alloteddistance,foodcutoff,foodlist ),x) x in initialpopulation]