CODEWITHSUNDEEP
pythonselenium-webdriverpythonanywhere
COC Hindi by sourabh soni
COC Hindi by sourabh soni

Reputation: 11

How to fix 'Message: Unable to locate element: {"method":"name","selector":"username"}'

My Python code is working totally fine in my PC, but when I uploaded it in server it shows error. Please see the code its easy to read

from pyvirtualdisplay import Display from selenium import webdriver import time

with Display():

browser = webdriver.Firefox()


try:

    browser.set_window_size(1080,800)

    browser.get('https://www.instagram.com/accounts/login')

    print (browser.title)

    time.sleep(5)

    # i used the screenshot to cheek the problem , but the screenshot is totally
    # blank (just a whit screen )  

    browser.save_screenshot("screenshot.png")
    print("clicked..!")
    browser.find_element_by_name("username").send_keys('*****')
    browser.find_element_by_name("password").send_keys('*****')

finally:
    browser.quit()

Login • Instagram clicked..!

Traceback (most recent call last):
  File "/home/Sourabh58/bot1.py", line 25, in <module>
    browser.find_element_by_name("username").send_keys('be_fully_motivated')
  File "/usr/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 365, in find_element_by_name
    return self.find_element(by=By.NAME, value=name)
  File "/usr/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 752, in find_element
    'value': value})['value']
  File "/usr/lib/python3.7/site-packages/selenium/webdriver/remote/webdriver.py", line 236, in execute
    self.error_handler.check_response(response)
  File "/usr/lib/python3.7/site-packages/selenium/webdriver/remote/errorhandler.py", line 192, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.NoSuchElementException: Message: Unable to locate element: {"method":"name","selector":"username"}

Upvotes: 0

Views: 101

Answers (1)

Dmitri T
Dmitri T

Reputation: 168002

Using time.sleep() is a some form of an anti-pattern as your test will wait for 5 seconds even if the element appears in DOM faster.

Consider refactoring your code to use Explicit Waits instead, this way WebDriver will poll the DOM for the element presence (or absence) and continue immediately after the element is found.

Suggested code change:

driver.get('https://www.instagram.com/accounts/login')

username = WebDriverWait(driver, 10).until(expected_conditions.presence_of_element_located((By.NAME, 'username')))
username.send_keys("****")
password = WebDriverWait(driver, 10).until(expected_conditions.presence_of_element_located((By.NAME, 'password')))
password.send_keys("****")

this 10 stanza stands for 10 seconds of maximum wait time, you can increase/decrease it according to your test scenario, network bandwidth, application response time, etc.

More information: How to use Selenium to test web applications using AJAX technology

Upvotes: 1

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