Python Socket问题：端口被识别为字符串引发TypeError报错

Hey there! Let's break down what's going wrong with your script and how to fix it quickly.

The Root Cause #

The error you're seeing happens because when you use input() to grab the port number, Python returns it as a string by default. But the connect_ex() method of a socket object expects the port to be an integer—that's why you're hitting this type mismatch error.

The Quick Fix #

All you need to do is convert the port input to an integer using the int() function. Here's how to adjust that part of your script:

# Replace this line:
port = input("Enter TCP/UDP port: ")

# With this:
port = int(input("Enter TCP/UDP port: "))

Making It More Robust (Optional) #

If you want to handle cases where someone might enter a non-numeric value (like letters or symbols), you can add a simple error-checking loop with try-except blocks to make your script more user-friendly:

while True:
    try:
        port = int(input("Enter TCP/UDP port: "))
        break  # Exit loop if input is a valid integer
    except ValueError:
        print("Oops, that's not a valid number! Please enter a numeric port.")

# Now use the port variable in your connect_ex call
if s.connect_ex((ip, port)):
    # Your existing logic here
    pass

Verifying the Fix #

After making this change, when you enter 443 as the port, Python will treat it as an integer instead of a string, and the connect_ex() method should run without throwing that TypeError.

内容的提问来源于stack exchange，提问作者agusbava