Python中列表中浮点数的总和

Question

I have got float values in s :

p = list(swn.senti_synsets(a))
s = p[0].pos_score()
print(s)

# Output
0.0
0.0
1.0
0.0
0.25
0.25

then I tried, print(sum(s)) which gives the error 'float' object is not Iterable. how to do this ?

Solution: Strange that I found the answer myself, i dont know but putting the thing of a separate function worked. `

for x in token: 
sum_pos=sum_pos+posCheck(x) 
sum_neg=sum_neg+negCheck(x) 
def posCheck(a): 
p=list(swn.senti_synsets(a)) 
s = p[0].pos_score() return(s)`

def negCheck(a): p=list(swn.senti_synsets(a)) s = p[0].neg_score() return(s)

I couldn't sum up the list, but when I put the function with returntype, it returned the sum of the positive numbers. Thanks to all of you for trying to help.

Answer 1

values = [0.0, 0.0, 1.0, 0.0, 0.25, 0.25]

print sum(values)

works fine for me

Answer 2

You can also use:

>>> l=[0.0, 0.0, 1.0, 0.0, 0.25, 0.25]
>>> sum(map(float,l))
1.5

---

As other said, sum(l) will also work. I don't know why you are getting error with that.

---

One possible reason might be that your list is of string data type. Convert it to float as:

l = map(float, l)

or

l = [float(i) for i in l]

Then using sum(l) would work properly.

---

EDIT: You can convert the s into list and then sum it.

s = p[0].pos_score()
print sum(list(s))

Answer 3

To sum float from a list , one easy way is to use fsum

import math

l=[0.0, 0.0, 1.0, 0.0, 0.25, 0.25]
math.fsum(l)

Answer 4

Try this:

It adds all pos_score() to a list, and then prints the sum.

p = list(swn.senti_synsets(a))
s = [x for x in p[0].pos_score()]
print(sum(s))

Answer 5

It is because in your original code, s is not iterable, and you can thus not use sum on a non-iterable object. If you were to add each value from s into a list, you could sum the list to give you the result you are looking for.

Not sure the function pos_score() function works, but perhaps you can create and return the list result from that function?

Answer 6

def do(*args):
    mylist_ = [float("{:.2f}".format(num)) for num in args]
    result =(sum(mylist))
    return result

print(do(23.32,45,67,54.27))

Result:

189.59

I hope this will help.