This content originally appeared on DEV Community and was authored by Insights YRS
Title: Selenium Syntax: The Correct Way to Send Login Information
Are you a Python programmer looking to automate web testing using Selenium? If so, you may have encountered an error when trying to send login information after opening a web page. In this tutorial, we will explore the correct syntax for sending login information using Selenium in Python.
First, let's start with the basics. Selenium is a powerful tool for automating web testing. It allows you to interact with web pages and simulate user actions, such as clicking buttons and filling out forms. To use Selenium in Python, you will need to install the Selenium WebDriver package. You can do this by running the following command in your terminal:
pip install selenium
Once you have installed the package, you can start writing your Python script. To send login information after opening a web page, you can use the following code:
from selenium import webdriver
# create a new webdriver instance
driver = webdriver.Chrome()
# navigate to the web page
driver.get("https://www.example.com/login")
# find the username and password input fields
username_input = driver.find_element(By.NAME, "username")
password_input = driver.find_element(By.NAME, "password")
# enter the login information
username_input.send_keys("your_username")
password_input.send_keys("your_password")
# submit the form
password_input.submit()
# close the webdriver
driver.quit()
In this example, we are using the Chrome WebDriver to interact with the web page. We first create a new webdriver instance using the webdriver.Chrome() method. We then navigate to the web page using the driver.get() method.
Next, we find the username and password input fields using the find_element() method. We pass in the By.NAME parameter to specify that we are looking for an input field with a specific name attribute. We then use the send_keys() method to enter the login information into the input fields.
Finally, we submit the form using the submit() method of the password input field. We then close the webdriver using the quit() method.
Now, let's talk about the error you mentioned in your question. The error message "name 'By' is not defined in the terminal" indicates that the By module is not imported in your Python script. To fix this error, you can add the following line at the top of your script:
from selenium.webdriver.common.by import By
This will import the By module from the selenium.webdriver.common.by package, which is required for using the By.NAME parameter.
Another issue you mentioned is that using .find_element_by_name() doesn't work. This method is deprecated in Selenium 3.x and has been replaced with the find_element() method. The find_element() method takes a single parameter, which is the locator strategy to use when finding the element. In this case, we are using the By.NAME strategy to find the input field with a specific name attribute.
In conclusion, to send login information after opening a web page in a Python script using Selenium, you can use the following code:
from selenium import webdriver
from selenium.webdriver.common.by import By
# create a new webdriver instance
driver = webdriver.Chrome()
# navigate to the web page
driver.get("https://www.example.com/login")
# find the username and password input fields
username_input = driver.find_element(By.NAME, "username")
password_input = driver.find_element(By.NAME, "password")
# enter the login information
username_input.send_keys("your_username")
password_input.send_keys("your_password")
# submit the form
password_input.submit()
# close the webdriver
driver.quit()
Remember to import the By module at the top of your script using from selenium.webdriver.common.by import By. Also, make sure you are using the correct locator strategy when finding the element you want to interact with.
📌 Source: reddit.com
This content originally appeared on DEV Community and was authored by Insights YRS
Insights YRS | Sciencx (2025-08-19T00:15:28+00:00) Title: Selenium Syntax: The Correct Way to Send Login Information. Retrieved from https://www.scien.cx/2025/08/19/title-selenium-syntax-the-correct-way-to-send-login-information/
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