Question

我有一个带有输出的程序，但是我希望输出是干净的（因此没有方括号或引号），并且我想将数字四舍五入到小数点后两位。

我尝试使用round函数，并尝试对括号使用.join方法，但是它们都不起作用。

import csv
import locale
from pprint import pprint, pformat

import locale
locale.setlocale(locale.LC_ALL, 'Dutch_Netherlands.1252')

gem_names = 'sellerRating', 'Duration', 'ClosePrice', 'OpenPrice'
gemiddelde = {gem_name: 0 for gem_name in gem_names}  # Zet de totale op nul.

num_waarden = 0
with open('bijlage.txt', newline='') as bestand:
    csvreader = csv.DictReader(bestand, delimiter=';')
    for row in csvreader:
        for gem_name in gem_names:
            gemiddelde[gem_name] += locale.atof(row[gem_name])
            num_waarden += 1

for gem_name, total in gemiddelde.items():
    gemiddelde[gem_name] = gemiddelde[gem_name] / num_waarden

print ('Dit zijn de gemiddelden:')
pprint(gemiddelde)

这是我得到的输出：

Dit zijn de gemiddelden:
{'ClosePrice': 9.712094266277953,
 'Duration': 1.6350826044703595,
 'OpenPrice': 3.553561710398435,
 'sellerRating': 940.226433430515}

尝试round(gemiddelde)时出现错误。当我尝试使用.join时，我的电话号码消失了。谁能帮我使它看起来干净吗？

Answer 1

在计算过程中最好不要const data = { "data": { "results": [{ "name": "Deadpool", "urls": [{ "type": "detail", "url": "http://marvel.com/characters/12/deadpool?utm_campaign=apiRef&utm_source=6fa9bcf637a9185ee2e3035cb2d3b465" }, { "type": "wiki", "url": "http://marvel.com/universe/Deadpool_(Wade_Wilson)?utm_campaign=apiRef&utm_source=6fa9bcf637a9185ee2e3035cb2d3b465" }, { "type": "comiclink", "url": "http://marvel.com/comics/characters/1009268/deadpool?utm_campaign=apiRef&utm_source=6fa9bcf637a9185ee2e3035cb2d3b465" }] }] } }; const urls = data.data.results.map(({ urls }) => urls.find(({ type }) => type === 'detail') ); console.log(urls);，因为四舍五入的误差可能会加起来。相反，只需使用循环和格式字符串来打印值，而不要依赖round，例如：

pprint

或类似，使用>>> gemiddelte = {'ClosePrice': 9.712094266277953, 'Duration': 1.6350826044703595, 'OpenPrice': 3.553561710398435, 'sellerRating': 940.226433430515} >>> for key, val in gemiddelte.items(): ... print("%15s %6.2f" % (key, val)) ... ClosePrice 9.71 Duration 1.64 OpenPrice 3.55 sellerRating 940.23：

str.format

如何四舍五入平均数并删除输出中的括号？

1 个答案: