Hey there! I get it—printing the whole line works, but splitting out each field for clean, readable output is way better. Let's walk through a Python implementation that does exactly what you need, with clear explanations along the way.

Step-by-Step Implementation #

First, here's a complete code example that reads your TXT file, searches for a target ID, and outputs each field in your desired format:

# Set the ID you want to search for
target_id = "456"  # Replace this with the actual ID you're querying
found_players = 0

# Open your player file (update the file path to match your actual file)
with open("players.txt", "r") as player_file:
    for line in player_file:
        # Remove extra whitespace/newlines and split the line into individual fields
        # Adjust the separator here if your fields use commas (split(',')), tabs (split('\t')), etc.
        player_data = line.strip().split()
        
        # Ensure the line has all 5 required fields to avoid errors
        if len(player_data) == 5:
            id_num, player_name, player_age, player_height, player_weight = player_data
            
            # Check if this line's ID matches our target
            if id_num == target_id:
                found_players += 1
                # Print the formatted results as requested
                print(f"{found_players} player/s have been found:")
                print(f'Player ID: {id_num}')
                print(f'Player name: {player_name}')
                print(f'Age: {player_age}')
                print(f'Height: {player_height}')
                print(f'Weight: {player_weight}')

# Handle the case where no matching ID was found
if found_players == 0:
    print("No players found with that ID.")

Key Details to Adjust for Your File #

• Field Separator: The code uses split() which works for space-separated fields. If your file uses commas (e.g., 1,John,25,180,75), replace split() with split(','). For tab-separated values, use split('\t').
• File Path: Make sure players.txt points to the correct location of your file (e.g., C:/data/players.txt on Windows or /home/user/players.txt on Linux/macOS).
• Target ID: Replace "456" with the actual ID you want to search for—you could even modify the code to accept user input instead of hardcoding this.

Why This Works #

• We use with open() to safely read the file (it automatically closes the file when done).
• strip() removes any trailing newlines or extra spaces from each line.
• Unpacking the player_data list into individual variables (id_num, player_name, etc.) lets us easily access each field for formatted output.
• We count matches as we go, so the opening line correctly reflects how many players were found.

Optional Optimization for Large Files #

If your TXT file is very large (thousands of lines), you can pre-load all players into a dictionary for faster future lookups:

player_dict = {}

with open("players.txt", "r") as player_file:
    for line in player_file:
        player_data = line.strip().split()
        if len(player_data) == 5:
            id_num = player_data[0]
            player_dict[id_num] = player_data[1:]  # Store name, age, height, weight under the ID

# Now you can look up any ID instantly
target_id = "456"
if target_id in player_dict:
    name, age, height, weight = player_dict[target_id]
    print(f"1 player/s have been found:")
    print(f'Player ID: {target_id}')
    print(f'Player name: {name}')
    print(f'Age: {age}')
    print(f'Height: {height}')
    print(f'Weight: {weight}')
else:
    print("No players found with that ID.")

This way, you only read the file once, and subsequent searches are nearly instant.

内容的提问来源于stack exchange，提问作者Tom Derwin