Python实现手机号检索文件联系人求助（新手向）

Hey there! I see you're trying to search for a contact using their phone number from your file.txt—let's get that working step by step.

The Problem with Your Current Code #

Right now, your code reads the entire file and prints it out, but it doesn't check for the specific phone number you input. We need to add logic to scan each line and match the number you're looking for.

Updated Code #

Here's a modified version that does exactly what you need:

def searchContact():
    # Get the phone number from user input (use input() instead of raw_input() for Python 3)
    number = raw_input("Enter phone number to search data : ")
    # Open the file in read mode (using 'with' auto-closes the file for you)
    with open("file.txt", "r") as obj1:
        # Iterate over each line in the file
        for line in obj1:
            # Clean up the line and split into contact details
            contact_details = line.strip().split()
            # Check if the phone number part matches your input
            if len(contact_details) >= 2 and contact_details[1] == number:
                print(line.strip())
                break
        else:
            # Runs if no matching number was found in any line
            print(f"No contact found with phone number {number}")

searchContact()

Key Changes Explained #

• Using with for file handling: This is a safer, cleaner way to work with files—it automatically closes the file once we're done, so you don't have to remember to call obj1.close().
• Line-by-line iteration: Instead of loading the whole file at once, we check each line individually. This is more efficient, especially if your contact list grows later.
• Splitting contact details: line.strip().split() removes extra spaces/newlines and turns each line into a list (like ["Alex", "996452544", "alex@gmail"]), making it easy to grab the phone number.
• Match check: We target the second item in the split list (since your phone number is always the second entry) and compare it to your input.
• No-match feedback: The else block attached to the for loop runs only if we finish all lines without finding a match, so you get a clear message when the number isn't in the file.

Quick Note for Python 3 Users #

If you're running Python 3, just replace raw_input() with input()—that's the only tweak you need!

Now when you run this and enter 996452544, you'll get exactly the result you want: Alex 996452544 alex@gmail. 😊

内容的提问来源于stack exchange，提问作者Vijay