输出显示两次BeautifulSoup Python

Question

当我尝试执行代码时，输​​出值显示两次。有没有办法只显示一次？

import requests
from bs4 import BeautifulSoup

def powr(url):
  source_code = requests.get(url)
  plain_text = source_code.text
  soup = BeautifulSoup(plain_text, 'html.parser')
  for text in soup.findAll('span', {'class': 'coin-page__price-number'}):
    head = text.string
    #print('Vertcoin =', head)
    print(head)

powr('https://coinranking.com/coin/power-ledger-powr')

输出：

0.695
0.695

Answer 1

使用find代替findAll解决问题。

当然你不再需要循环了。 ： - ）

Answer 2

Easiest way to encounter this problem is to use return instead of print    at the end of your function.

def powr(url):
  source_code = requests.get(url)
  plain_text = source_code.text
  soup = BeautifulSoup(plain_text, 'html.parser')
  for text in soup.findAll('span', {'class': 'coin-page__price-number'}):
    head = text.string
  return head

powr('https://coinranking.com/coin/power-ledger-powr')