Open file for append

Notify me of follow-up comments by email. Notify me of new posts by email. This site uses Akismet to reduce spam. Learn how your comment data is processed. Python File Handling Quiz Time limit: 0. Quiz-summary 0 of 10 questions completed Questions: 1 2 3 4 5 6 7 8 9 You have already completed the quiz before.

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Contents Exit focus mode. Is this page helpful? Please rate your experience Yes No. Any additional feedback? Note Visual Basic users may choose to use the methods and properties provided by the Log class or FileSystem class for creating or writing to log files. Context Managers are Python constructs that will make your life much easier. By using them, you don't need to remember to close a file at the end of your program and you have access to the file in the particular part of the program that you choose.

If the code is not indented, it will not be considered part of the context manager. This context manager opens the names. This variable is used in the body of the context manager to refer to the file object.

After the body has been completed, the file is automatically closed, so it can't be read without opening it again. But wait! We have a line that tries to read it again, right here below:. This error is thrown because we are trying to read a closed file. Awesome, right? The context manager does all the heavy work for us, it is readable, and concise. When you're working with files, errors can occur. Sometimes you may not have the necessary permissions to modify or access a file, or a file might not even exist.

As a programmer, you need to foresee these circumstances and handle them in your program to avoid sudden crashes that could definitely affect the user experience. Let's see some of the most common exceptions runtime errors that you might find when you work with files:.

According to the Python Documentation , this exception is:. For example, if the file that you're trying to open doesn't exist in your current working directory:.

This is a huge advantage during the process of debugging. This is another common exception when working with files. This exception is raised when you are trying to read or modify a file that don't have permission to access.

If you try to do so, you will see this error:. This particular exception is raised when you try to open or work on a directory instead of a file, so be really careful with the path that you pass as argument. With this statement, you can "tell" your program what to do in case something unexpected happens. Perhaps you could create a new file if it doesn't exist already. To close the file automatically after the task regardless of whether an exception was raised or not in the try block you can add the finally block.

I really hope you liked my article and found it helpful. Now you can work with files in your Python projects. Check out my online courses. Follow me on Twitter. I'm a developer, writer, and content creator freeCodeCamp. I run the freeCodeCamp.

If you read this far, tweet to the author to show them you care. Tweet a thanks. Learn to code for free. Get started. Forum Donate. Estefania Cassingena Navone.