Reading Text Files in Python

Free Video Tutorial and Guide

In this video, we're going to look at how to read Text Files in Python

Video Transcription

Hi, my name is Art, and I teach Python at Noble Desktop. In this video, I'm going to show you how you can read data from a text file.

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We don't have a text file that we can read data from, so let's create one. I'm going to copy some text from CNN.com and write the data into a text file. Now, that's my text file.

I'm going to read data from that file. This data comes as a plain vanilla string. Let's assign it to a variable name, "data", and use type on "data". That's a string.

Now, I want to get rid of all the "Monday, give me a call next Monday" stuff. To do that, I'm going to use the "split" method. It's a little bit confusing because "split" comes from a string, but always returns a list.

I'm going to split it by all the exclamation points and assign it to a variable name, "list". I'm going to run "len" on that list and now I have one huge string within that list. I'm going to assign it to a variable name "string".

Now, suppose I want to go word by word. I'm going to split "string" again and leave it blank. Now, I have a bunch of words. I'm going to call it "words".

Maybe I want to count how many times they use the word "there". I could convert it to lowercase and create a counter. I'm going to set it to 0 and loop through "words". If I find the word "there", I'm going to update the counter.

Counter would be 9, so apparently they use "there" 9 times in that text.

The main idea behind this exercise is that you can use "open" to read data from a text file and then you can do whatever you like with the string. You can split it, apply lower or upper, etc. That's a string. All right, thank you.

How to Learn Python

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