Got it, let's walk through how to set up bulk calls using Twilio's Python SDK, including pulling target numbers from a text file. I'll fix the small issue in your original code and break this down into actionable steps with working examples.

Prerequisites First #

Before diving in, make sure you have these ready:

• Install the Twilio Python SDK: pip install twilio
• Your Twilio Account SID and Auth Token (grab these from your Twilio dashboard)
• A Twilio phone number that can make outgoing calls
• A text file (let's call it phone_numbers.txt) with one phone number per line—each number needs a country code (e.g., +1234567890 for US numbers)

Step 1: Read Numbers from Your Text File #

First, we'll write a simple function to load and clean up the numbers from your file. This handles empty lines and extra whitespace automatically.

Step 2: Bulk Call Implementation #

Your original code tried passing lists to to and from_—that won't work, since Twilio's calls.create() expects single strings for individual calls. Instead, we'll loop through each number from the file and initiate a call for each one.

Here's the full working code:

import os
from twilio.rest import Client

def read_phone_numbers(file_path):
    """Read and clean phone numbers from a text file (one per line)"""
    with open(file_path, 'r') as f:
        # Strip whitespace and skip empty lines
        numbers = [line.strip() for line in f if line.strip()]
    return numbers

# Replace these with your actual Twilio credentials
TWILIO_ACCOUNT_SID = 'AXXXXXXXXXXXXXXXXXXxx'
TWILIO_AUTH_TOKEN = '1XXXXXXXXXXXXXXXXXXX'
TWILIO_FROM_NUMBER = '+17123XXX'  # Your Twilio phone number
# TwiML URL tells Twilio what to do when the call connects (demo URL included)
TWIML_CALL_URL = "http://demo.twilio.com/docs/voice.xml"

# Path to your numbers file
NUMBERS_FILE_PATH = 'phone_numbers.txt'

def main():
    # Initialize Twilio client
    client = Client(TWILIO_ACCOUNT_SID, TWILIO_AUTH_TOKEN)
    # Load target numbers
    target_numbers = read_phone_numbers(NUMBERS_FILE_PATH)
    
    # Loop through each number and initiate a call
    for number in target_numbers:
        try:
            call = client.calls.create(
                to=number,
                from_=TWILIO_FROM_NUMBER,
                url=TWIML_CALL_URL
            )
            print(f"✅ Call started to {number} | Call SID: {call.sid}")
        except Exception as e:
            print(f"❌ Failed to call {number}: {str(e)}")

if __name__ == "__main__":
    main()

Key Notes to Keep in Mind #

• Error Handling: The try/except block ensures that if one call fails (e.g., invalid number, Twilio quota hit), the rest of the calls still go through.
• TwiML Customization: The demo URL plays a sample message, but you can replace it with your own TwiML. For example, you can generate custom TwiML directly in code:

  from twilio.twiml.voice_response import VoiceResponse
  
  def get_custom_twiml():
      response = VoiceResponse()
      response.say("Hi there! This is your custom bulk call message. Thanks for listening!")
      return str(response)
  

  You'd then host this TwiML (using Twilio Functions, a simple web server, etc.) and update the TWIML_CALL_URL to point to it.
• Rate Limits: Twilio has limits on how many calls you can initiate per minute—check Twilio's docs to avoid hitting these limits (you might need to add small delays if you're calling a huge list).
• Number Formatting: Always include the country code for every number—this is critical for Twilio to route the call correctly.

内容的提问来源于stack exchange，提问作者Said