get values from multiple searches or responses from url at a same time (concurrently). how to do it? using Beautifulsoup
here is my code
import requests
import time
import sha3
from bs4 import BeautifulSoup
from ecdsa import SigningKey, SECP256k1
start = time.time()
i = 1
while(i<=100):
t_time = time.time() - start
# i want first generate address first for example i'm given 100 address generate take time 0.125sec
# one address generate scan show balance and token take 100 address 115 second this time saving way need code bro
keccak = sha3.keccak_256()
priv = SigningKey.generate(curve=SECP256k1)
pub = priv.get_verifying_key().to_string()
keccak.update(pub)
address = keccak.hexdigest()[24:]
# first address generate gone, before show balance and token number\
# After scan multiple searcing url set need bro, EXA: same time scan multiple address reduce time
# For example same time multiple address scan show balance and Token. this set searcing time save.....
url = ("https://etherscan.io/address/" + address)
html = requests.get(url, headers={'user-agent': 'Mozilla/5.0'}).text
soup = BeautifulSoup(html, "html.parser")
box = soup.find("div", class_="col-md-6 mb-3 mb-md-0")
data = box.find_all('div', class_='col-md-8')
try:
balance = data[0].text.split(' ')[0].strip()
# token only show number only exa: 0x**********************************[hidden] : This address have 9 token number
token = data[2].text.split(' ')[0].strip()
except IndexError:
token = 0
print (address+" "+balance+" "+str(token))
print (t_time)
i = i + 1
Mukuldeep Maiti Answered question
You can use multi-threading to make it fast by executing parallelly/concurrently. In python there is a package called ‘threading’ which provides almost all necessary methods for implementing multi-threading concept in your program. here is a simple program implementing multi-threading
import threading
#function to be used in thread
def func(i):
print("thread:"+str(i))
if __name__ == "__main__":
#creating thread
th1 = threading.Thread(target=func, args=(1,))
th2 = threading.Thread(target=func, args=(2,))
th3 = threading.Thread(target=func, args=(3,))
#starting thread
th1.start()
th2.start()
th3.start()
#wait till threads completes its execution
th1.join()
th2.join()
th3.join()
print("all the thread executed!")
as per your program is concerned, you can put the whole code that is inside the while loop into a function and execute it with multiple thread. Program will looks like
import threading
import requests
import time
import sha3
from bs4 import BeautifulSoup
from ecdsa import SigningKey, SECP256k1
start = time.time()
def func(i):
t_time = time.time() - start
keccak = sha3.keccak_256()
priv = SigningKey.generate(curve=SECP256k1)
pub = priv.get_verifying_key().to_string()
keccak.update(pub)
address = keccak.hexdigest()[24:]
url = ("https://etherscan.io/address/" + address)
html = requests.get(url, headers={'user-agent': 'Mozilla/5.0'}).text
time.sleep(10)
soup = BeautifulSoup(html, "html.parser")
box = soup.find("div", class_="col-md-6 mb-3 mb-md-0")
data = box.find_all('div', class_='col-md-8')
try:
balance = data[0].text.split(' ')[0].strip()
token = data[2].text.split(' ')[0].strip()
except IndexError:
token = 0
print (address+" "+balance+" "+str(token))
print (t_time)
#list of thread
thread_list=[]
#creating thread
i = 0
while(i<=100):
t = threading.Thread(target=func, args=(i,))
thread_list.append(t)
i = i + 1
#starting threads
i = 0
while(i<=100):
thread_list[i].start()
i = i + 1
#waiting for completion
i = 0
while(i<=100):
thread_list[i].join()
i = i + 1
raabnits Posted new comment
but 2nd code will face a synchronization problem because the page needs time to load, especially when you are loading hundreds of pages concurrently. so, the box object not be created and a null attribute error will be produced as findall() will not be there for null object ‘box’