需要有关普通Python的帮助

Question

在[quant]字段中找到大于或等于(337)的值的平均值,这是定量字段

quant
100
7
109
204
28
292
105
254
441
401
410
14
15
51
96
403
75
31
109
17

这是我试过的代码

import csv

total = count = 0

with open('3111111a.csv', newline='') as f:
    reader = csv.reader(f)
    next(reader, None)  

    for row in reader:
        total += float(row[4])
        count += 1

    if count:
        average = total / count
        print('The average of the values is {}'.format(average))

Answer 1

试试这个:

#!/bin/env python
import csv
from itertools import islice

total = count = 0

with open('3111111a.csv', newline='') as f:
    reader = csv.reader(f)
    # `isslice` will skip any header/title row.
    # Generates a list of integers from the fourth CSV value
    numbers = (int(row[4]) for row in islice(reader, 1, None))
    # Generates another list of values that are >= 337
    gt337 = [i for i in numbers if i >= 337]

# Sums all the numbers in our list then divides by the number to get the average
print (sum(gt337)/len(gt337))

使用的最高分with!

您可以从文档中了解有关islice()和List Comprehensions的更多信息.

玩得开心Python:-)