列表中的Python max（date）

Question

I'm trying to return the max date in a list from a bs4 scrape. Here's what I've got so far..

import requests
from datetime import date, datetime, timedelta
from collections import OrderedDict, defaultdict
from bs4 import BeautifulSoup as soup
from urllib.request import urlopen as uReq

con = requests.get("https://au.investing.com/currencies/aud-usd-historical-data/",
               headers={'User-Agent': 'Mozilla/5.0'})
odcon = OrderedDict()
content_page = soup(con.content, 'html.parser')
table = content_page.find('table', {'class': 'genTbl closedTbl historicalTbl'})
cols = [th.text for th in table.select("th")[1:]]
for row in table.select("tbody tr"):
    data = [td.text for td in row.select("td")]
    data[0] = datetime.strptime(data[0], '%b %d, %Y').strftime('%d/%m/%Y')
    print(max(data[0]))



Output looks like this for print(data[0])
13/09/2018
12/09/2018
11/09/2018
10/09/2018
09/09/2018
07/09/2018
06/09/2018
05/09/2018
04/09/2018
03/09/2018
02/09/2018
31/08/2018
30/08/2018
29/08/2018
28/08/2018
27/08/2018
26/08/2018
24/08/2018
23/08/2018
22/08/2018
21/08/2018
20/08/2018
19/08/2018
17/08/2018
16/08/2018
15/08/2018
14/08/2018
13/08/2018

I would like the max date in this list to be returned/printed.

This is probably an easy solve.. but I can't figure it out. Any help would be much appreciated.

Answer 1

How about this mod to your code

dateList = []

for row in table.select("tbody tr"):
    data = [td.text for td in row.select("td")]
    d = datetime.strptime(data[0], '%b %d, %Y').date()
    dateList = dateList + [d, ]

print max(dateList)

Answer 2

format the date after sorting the list of the dates:

from bs4 import BeautifulSoup as bs4
site = requests.get("https://au.investing.com/currencies/aud-usd-historical-data/", headers={'User-Agent': 'Mozilla/5.0'})
content_page = bs4(site.content, 'html.parser')
table = content_page.find('table', {'class': 'genTbl closedTbl historicalTbl'})
cols = [th.text for th in table.select("th")[1:]]

dates = []
for row in table.select("tbody tr"):
    data = [td.text for td in row.select("td")]
    dates.append(data[0])
dates.sort()
datetime.strptime(max(dates), '%b %d, %Y').strftime('%d/%m/%Y')

output:

'13/09/2018'

BTW, cols isn't being used here.