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Batch adding WhatsApp users to a group using a list of phone numbers is a common requirement when automating group operations. Since WhatsApp does not provide an official API to directly perform these actions, especially for bulk operations, we will need to use WhatsApp Web and automation tools (like Selenium) to simulate this behavior.

Technical Path

1. Using WhatsApp Web: We will leverage WhatsApp Web to perform group operations. WhatsApp Web is the web-based version of WhatsApp that allows users to perform common tasks like creating groups, adding members, sending messages, etc., via the browser.

2. Using Selenium for Automation: We will use Selenium to automate browser interactions and simulate user behavior to perform the bulk operations.

3. Adding Users by Phone Numbers: In WhatsApp Web, adding users to a group requires them to be in the contact list. Therefore, before proceeding, ensure that these phone numbers are already saved as contacts in your WhatsApp contact list. You may need to first save the phone numbers as contacts before adding them to the group via WhatsApp Web.

4. Group Limitations: WhatsApp groups have a limit on the number of members (currently, each group can hold up to 1024 members), so you need to manage the size of your bulk operations accordingly.

Implementation Steps

1. Open WhatsApp Web and Log In: Use Selenium to open WhatsApp Web and log in.

2. Create or Open the Group: Automate the process of opening an existing group or creating a new group.

3. Batch Add Users: Use Selenium to simulate user actions and input phone numbers or contact names to add users to the group one by one.

Detailed Implementation and Example Code

1. Install Dependencies

First, make sure to install Selenium and download the Chrome Driver (chromedriver):

pip install selenium

2. Automating Login and Group Operations with Selenium

The following code demonstrates how to use Selenium to log into WhatsApp Web and batch add users to a group.

Example Code: Batch Add WhatsApp Users to a Group

See above codes screenshot pls! Code Explanation:

1. create_browser(): Creates a Chrome browser session with a user data directory to maintain the login state.

2. login_whatsapp(): Opens WhatsApp Web and waits for the user to scan the QR code to log in.

3. open_group(): Automates the process of searching for the group by name and opening the group chat window.

4. add_members_to_group(): Inputs phone numbers or contact names to add users to the group one by one.

3. Key Considerations

• Phone Number Format: Ensure that the phone numbers are in the correct format (with international dialing codes) and that these numbers are already added to your WhatsApp contact list. WhatsApp requires recognizing the contact before adding them to the group.

• Group Member Limits: Each WhatsApp group can hold up to 1024 members, so be mindful not to exceed this limit during bulk additions.

• Rate Limits: WhatsApp has rate limits for batch operations. Adding too many members in a short period may trigger WhatsApp's anti-spam mechanisms, resulting in account restrictions or bans. It is advisable to introduce delays between member additions to simulate natural user behavior.

4. Proxy and IP Rotation

If you need to perform these operations under different devices or network environments, it is recommended to use proxies or VPNs to avoid WhatsApp detecting bulk operations from the same IP address.

By using WhatsApp Web and Selenium, you can automate the process of adding WhatsApp users (from a list of phone numbers) to a group in bulk. The main steps are:

1. Use Selenium to automate opening WhatsApp Web and logging in.

2. Search for and open the target group by name.

3. Input the phone numbers or contact names to add users to the group one by one.

When implementing this solution in practice, be mindful of WhatsApp's limitations (such as group size limits and rate limits) and ensure compliance with WhatsApp's Terms of Service to avoid account bans.