Python groupby itertools 方法

Question

I am new to python programing.I am unable to create the following code:

Define a function even_or_odd, which takes an integer as input and returns the string even and odd, if the given number is even and odd respectively. Categorise the numbers of list n = [10, 14, 16, 22, 9, 3, 37] into two groups namely even and odd based on above defined function. Hint: Use groupby method of itertools module. Iterate over the obtained groupby object and print it's group name and list of elements associated with a group.

I have tried below code:

import itertools
def even_or_odd(n):
    if n%2==0:
        return 'even'
    else:
        return 'odd'
group=[]
uniquekeys=[]
n = [10, 14, 16, 22, 9, 3 , 37]
for k,g in itertools.groupby(n, even_or_odd(n)):
    groups.append(list(g))    
    uniquekeys.append(k)

It is giving "TypeError: unsupported operand type(s) for %: 'list' and 'int' "

Answer 1

When you try to pass itertools.groupby even_or_odd you call it with n . even_or_odd takes an int , but n is a list. Just change it to itertools.groupby(n, even_or_odd)
Also you append to groups when I think you mean group .