Append information in the th tags to td rows - html

Question

I am an economist struggling with coding and data scraping.
I am scarping data from the main and unique table on this webpage (https://www.oddsportal.com/basketball/europe/euroleague-2013-2014/results/). I can retrieve all the information of the td HTML tags with python selenium by referring to the class element. The same goes for the th tag where it is stored the information of the date and stage of the competition. In my final dataset, I would like to have the information stored in the th tag in two rows (data and stage of the competition) next to the other rows in the table. Basically, for each match, I would like to have the date and the stage of the competition in rows and not as the head of each group of matches.
The only solution I came up with is to index all the rows (with both th and td tags) and build a while loop to append the information in the th tags to the td rows whose index is lower than the next index for the th tag. Hope I made myself clear (if not I will try to give a more graphical explanation). However, I am not able to code such a logic construct due to my poor coding abilities. I do not know if I need two loops to iterate through different tags (td and th) and in case how to do that. If you have any easier solution, it is more than welcome!
Thanks in advance for the precious help!
code below:
from selenium import webdriver
import time
import pandas as pd
# Season to filter
seasons_filt = ['2013-2014', '2014-2015', '2015-2016','2016-2017', '2017-2018', '2018-2019']
# Define empty data
data_keys = ["Season", "Match_Time", "Home_Team", "Away_Team", "Home_Odd", "Away_Odd", "Home_Score",
"Away_Score", "OT", "N_Bookmakers"]
data = dict()
for key in data_keys:
data[key] = list()
del data_keys
# Define 'driver' variable and launch browser
#path = "C:/Users/ALESSANDRO/Downloads/chromedriver_win32/chromedriver.exe"
#path office pc
path = "C:/Users/aldi/Downloads/chromedriver.exe"
driver = webdriver.Chrome(path)
# Loop through pages based on page_num and season
for season_filt in seasons_filt:
page_num = 0
while True:
page_num += 1
# Get url and navigate it
page_str = (1 - len(str(page_num)))* '0' + str(page_num)
url ="https://www.oddsportal.com/basketball/europe/euroleague-" + str(season_filt) + "/results/#/page/" + page_str + "/"
driver.get(url)
time.sleep(3)
# Check if page has no data
if driver.find_elements_by_id("emptyMsg"):
print("Season {} ended at page {}".format(season_filt, page_num))
break
try:
# Teams
for el in driver.find_elements_by_class_name('name.table-participant'):
el = el.text.strip().split(" - ")
data["Home_Team"].append(el[0])
data["Away_Team"].append(el[1])
data["Season"].append(season_filt)
# Scores
for el in driver.find_elements_by_class_name('center.bold.table-odds.table-score'):
el = el.text.split(":")
if el[1][-3:] == " OT":
data["OT"].append(True)
el[1] = el[1][:-3]
else:
data["OT"].append(False)
data["Home_Score"].append(el[0])
data["Away_Score"].append(el[1])
# Match times
for el in driver.find_elements_by_class_name("table-time"):
data["Match_Time"].append(el.text)
# Odds
i = 0
for el in driver.find_elements_by_class_name("odds-nowrp"):
i += 1
if i%2 == 0:
data["Away_Odd"].append(el.text)
else:
data["Home_Odd"].append(el.text)
# N_Bookmakers
for el in driver.find_elements_by_class_name("center.info-value"):
data["N_Bookmakers"].append(el.text)
# TODO think of inserting the dates list in the dataframe even if it has a different size (19 rows and not 50)
except:
pass
driver.quit()
data = pd.DataFrame(data)
data.to_csv("data_odds.csv", index = False)
I would like to add this information to my dataset as two additional rows:
for el in driver.find_elements_by_class_name("first2.tl")[1:]:
el = el.text.strip().split(" - ")
data["date"].append(el[0])
data["stage"].append(el[1])

Answer 1

Few things I would change here.
Don't overwrite variables. You store elements in your el variable, then you over write the element with your strings. It may work for you here, but you may get yourself into trouble with that practice later on, especially since you are iterating through those elements. It makes it hard to debug too.
I know Selenium has ways to parse the html. But I personally feel BeautifulSoup is a tad easier to parse with and is a little more intuitive if you are simply just trying to pull out data from the html. So I went with BeautifulSoup's .find_previous() to get the tags that precede the games, essentially then able to get your date and stage content.
Lastly, I like to construct a list of dictionaries to make up the data frame. Each item in the list is a dictionary key:value where the key is the column name and value is the data. You sort of do the opposite in creating a dictionary of lists. Now there is nothing wrong with that, but if the lists don't have the same length, you're get an error when trying to create the dataframe. Where as with my way, if for what ever reason there is a value missing, it will still create the dataframe, but will just have a null or nan for the missing data.
There may be more work you need to do with the code to go through the pages, but this gets you the data in the form you need.
Code:
from selenium import webdriver
from selenium.webdriver.chrome.service import Service
import time
import pandas as pd
from bs4 import BeautifulSoup
import re
# Season to filter
seasons_filt = ['2013-2014', '2014-2015', '2015-2016','2016-2017', '2017-2018', '2018-2019']
# Define 'driver' variable and launch browser
path = "C:/Users/ALESSANDRO/Downloads/chromedriver_win32/chromedriver.exe"
driver = webdriver.Chrome(path)
rows = []
# Loop through pages based on page_num and season
for season_filt in seasons_filt:
page_num = 0
while True:
page_num += 1
# Get url and navigate it
page_str = (1 - len(str(page_num)))* '0' + str(page_num)
url ="https://www.oddsportal.com/basketball/europe/euroleague-" + str(season_filt) + "/results/#/page/" + page_str + "/"
driver.get(url)
time.sleep(3)
# Check if page has no data
if driver.find_elements_by_id("emptyMsg"):
print("Season {} ended at page {}".format(season_filt, page_num))
break
try:
soup = BeautifulSoup(driver.page_source, 'html.parser')
table = soup.find('table', {'id':'tournamentTable'})
trs = table.find_all('tr', {'class':re.compile('.*deactivate.*')})
for each in trs:
teams = each.find('td', {'class':'name table-participant'}).text.split(' - ')
scores = each.find('td', {'class':re.compile('.*table-score.*')}).text.split(':')
ot = False
for score in scores:
if 'OT' in score:
ot == True
scores = [x.replace('\xa0OT','') for x in scores]
matchTime = each.find('td', {'class':re.compile('.*table-time.*')}).text
# Odds
i = 0
for each_odd in each.find_all('td',{'class':"odds-nowrp"}):
i += 1
if i%2 == 0:
away_odd = each_odd.text
else:
home_odd = each_odd.text
n_bookmakers = soup.find('td',{'class':'center info-value'}).text
date_stage = each.find_previous('th', {'class':'first2 tl'}).text.split(' - ')
date = date_stage[0]
stage = date_stage[1]
row = {'Season':season_filt,
'Home_Team':teams[0],
'Away_Team':teams[1],
'Home_Score':scores[0],
'Away_Score':scores[1],
'OT':ot,
'Match_Time':matchTime,
'Home_Odd':home_odd,
'Away_Odd':away_odd,
'N_Bookmakers':n_bookmakers,
'Date':date,
'Stage':stage}
rows.append(row)
except:
pass
driver.quit()
data = pd.DataFrame(rows)
data.to_csv("data_odds.csv", index = False)
Output:
print(data.head(15).to_string())
Season Home_Team Away_Team Home_Score Away_Score OT Match_Time Home_Odd Away_Odd N_Bookmakers Date Stage
0 2013-2014 Real Madrid Maccabi Tel Aviv 86 98 False 18:00 -667 +493 7 18 May 2014 Final Four
1 2013-2014 Barcelona CSKA Moscow 93 78 False 15:00 -135 +112 7 18 May 2014 Final Four
2 2013-2014 Barcelona Real Madrid 62 100 False 19:00 [phone] May 2014 Final Four
3 2013-2014 CSKA Moscow Maccabi Tel Aviv 67 68 False 16:00 -278 +224 7 16 May 2014 Final Four
4 2013-2014 Real Madrid Olympiacos 83 69 False 18:45 -500 +374 7 25 Apr 2014 Play Offs
5 2013-2014 CSKA Moscow Panathinaikos 74 44 False 16:00 -370 +295 7 25 Apr 2014 Play Offs
6 2013-2014 Olympiacos Real Madrid 71 62 False 18:45 [phone] Apr 2014 Play Offs
7 2013-2014 Maccabi Tel Aviv Olimpia Milano 86 66 False 17:45 -217 +179 7 23 Apr 2014 Play Offs
8 2013-2014 Panathinaikos CSKA Moscow 73 72 False 16:30 -106 -112 7 23 Apr 2014 Play Offs
9 2013-2014 Panathinaikos CSKA Moscow 65 59 False 18:45 -125 +104 7 21 Apr 2014 Play Offs
10 2013-2014 Maccabi Tel Aviv Olimpia Milano 75 63 False 18:15 -189 +156 7 21 Apr 2014 Play Offs
11 2013-2014 Olympiacos Real Madrid 78 76 False 17:00 [phone] Apr 2014 Play Offs
12 2013-2014 Galatasaray Barcelona 75 78 False 17:00 [phone] Apr 2014 Play Offs
13 2013-2014 Olimpia Milano Maccabi Tel Aviv 91 77 False 18:45 -286 +227 7 18 Apr 2014 Play Offs
14 2013-2014 CSKA Moscow Panathinaikos 77 51 False 16:15 -303 +247 7 18 Apr 2014 Play Offs