Until now, the Python code you've been writing comes from one source and only goes to one place: you type it in at the keyboard and its results are displayed in the console. But what if you want to...

Let's walk through the process of writing to a file one step at a time. The first code that you saw executed in the previous exercise was this: [...] This told Python to open [...] in [...]...

Good work! Now it's time to write some data to a new [...] file. We added the list comprehension from the first exercise to the code in the editor. Our goal in this exercise will be to write eac...

Excellent! You're a pro. Finally, we want to know how to read from our [...] file. As you might expect, we do this with the [...] function, like so: [...]

What if we want to read from a file line by line, rather than pulling the entire file in at once. Thankfully, Python includes a [...] method that does exactly that. If you open a file and call ...

We keep telling you that you always need to close your files after you're done writing to them. Here's why! During the I/O process, data is buffered: this means that it is held in a temporary lo...

Programming is all about getting the computer to do the work. Is there a way to get Python to automatically close our files for us? Of course there is. This is Python. You may not know this, but ...

It worked! Our Python program successfully wrote to [...] .

Finally, we'll want a way to test whether a file we've opened is closed. Sometimes we'll have a lot of file objects open, and if we're not careful, they won't all be closed. How can we test this? ...