Detailed explanation of how to replace file path and line number to read in Python

In Python, replacing file paths and line numbers to be read is very simple, because these are usually just string variables passed to a function or script. Here is an example of how to do this:

First, suppose you have a function that takes the file path and line number as parameters and reads that line. This function might look like this:

def read_specific_line(file_path, line_number):
    with open(file_path, 'r') as file:
        for i, line in enumerate(file, 1):
            if i == line_number:
                return ()
    return None

To replace the file path and line number, you just need to pass in the new value when calling this function. For example:

# Original file path and line numberoriginal_file_path = "path/to/original/"
original_line_number = 5

# Call the function and print the resultline = read_specific_line(original_file_path, original_line_number)
if line:
    print(f"Line {original_line_number}: {line}")
else:
    print(f"Line {original_line_number} not found in {original_file_path}")

# New file path and line numbernew_file_path = "path/to/new/"
new_line_number = 10

# Call the function with the new file path and line number and print the resultline = read_specific_line(new_file_path, new_line_number)
if line:
    print(f"Line {new_line_number}: {line}")
else:
    print(f"Line {new_line_number} not found in {new_file_path}")

In this example, we first define the original file path and line number, and use these values ​​to call the read_specific_line function. We then define the new file path and line number and call this function again. Each call reads and returns the corresponding line according to the provided file path and line number.

Make sure that the new file path points to an existing file and that the line number is within the file's scope. Otherwise, the function will return None, indicating that the specified line is not found.

If you hardcoded these values ​​in a script and want to replace them, just find those values ​​and replace them with a new string. If it is obtained in command line parameters, configuration files, or environment variables, you need to modify the corresponding input source.

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