def sub_sum(L):

    s1 = 0

    s2 = 0

    for i in L:

        if i%2!=0:

            s1 = s1+i

        else:

            s2 = s2+1

    return s1,s2

L = [1,2,3,4]

s1,s2 = sub_sum(L)

print('奇数项之和={}'.format(s1))

print('偶数项之和={}'.format(s2))

为什么在print那两行 “奇数项之和”后面与等号不能空一个空格