How can I execute a Python script file with another script in Python 3?

In the context of Python programming language, in Python 2 the execfile function would allow the implementation of a Python script file within the current interpreter session. However, Python 3 would remove the execfile due to changes in the implementation model and improved handling of the file operations and namespaces.

To replicate functionality in Python 3, you would need to:

Open the file which contains the Python-based script.

Read the content of the particular file.

Now implement the read content by using the exec function, which can implement dynamically created Python-based code.

Python 2 code using execfile

# script_to_run.py

Print(“This script is executed.”)

# main_script.py

Execfile(‘script_to_run.py’)

Python 3 code using exec:

Script to be implemented (script_to_run.ply)

# script_to_run.py

Print(“This script is executed.”)

Main script (main_script.py)

# main_script.py

# Function to execute another script

Def exec_script(file_path):

    Try:

        # Open the script file in read mode

        With open(file_path, ‘r’) as file:

            # Read the content of the script file

            Script_content = file.read()

            # Optionally, define a global and local dictionary for exec

            Global_dict = globals()

            Local_dict = locals()

            # Execute the content of the script file

            Exec(script_content, global_dict, local_dict)

            Print(f”Successfully executed {file_path}”)

    Except FileNotFoundError:

        Print(f”Error: The file {file_path} was not found.”)

    Except Exception as e:

        Print(f”Error while executing {file_path}: {e}”)

# Path to the script to be executed

Script_path = ‘script_to_run.py’

# Execute the script

Exec_script(script_path)

# Additional code in main_script.py

Print(“This is main_script.py”)

This code structure would ensure that the script _to_run.py file will implemented within the main_script.py script, which would replicate the functionality of execfile in the Python 3 environment.