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Import PSD Files into the Program. Click on the green Add File (s) button, located in the main toolbar to open the file finder window. Find and select the PSD files on your computer and click Open to bring them into Doxillion to convert them to the HTML file format. You can also drag and drop your PSD files directly into the program to. This is how you can use textedit in Mac to edit html files.https://a1websitepro.com/absolute-beginners-course-in-web-development/.

Contents

• Using Python to Control Firefox

Lesson Goals

This lesson uses Python to create and view an HTML file. If you writeprograms that output HTML, you can use any browser to look at yourresults. This is especially convenient if your program is automaticallycreating hyperlinks or graphic entities like charts and diagrams.

Here you will learn how to create HTML files with Python scripts, andhow to use Python to automatically open an HTML file in Firefox.

Files Needed For This Lesson

• obo.py

If you do not have these files from the previous lesson, you candownload programming-historian-5, a zip file from the previous lesson.

Creating HTML with Python

At this point, we’ve started to learn how to use Python to downloadonline sources and extract information from them automatically. Rememberthat our ultimate goal is to incorporate programming seamlessly into ourresearch practice. In keeping with this goal, in this lesson and thenext, we will learn how to output data back as HTML. This has a fewadvantages. First, by storing the information on our hard drive as anHTML file we can open it with Firefox and use Zotero to index andannotate it later. Second, there are a wide range of visualizationoptions for HTML which we can draw on later.

If you have not done the W3 Schools HTML tutorial yet, take a fewminutes to do it before continuing. We’re going to be creating an HTMLdocument using Python, so you will have to know what an HTML documentis!

“Hello World” in HTML using Python

One of the more powerful ideas in computer science is that a file thatseems to contain code from one perspective can be seen as data fromanother. It is possible, in other words, to write programs thatmanipulate other programs. What we’re going to do next is create an HTMLfile that says “Hello World!” using Python. We will do this by storingHTML tags in a multiline Python string and saving the contents to a newfile. This file will be saved with an .html extension rather than a.txt extension.

Typically an HTML file begins with a doctype declaration. You sawthis when you wrote an HTML “Hello World” program in an earlier lesson.To make reading our code easier, we will omit the doctype in thisexample. Recall a multi-line string is created by enclosing the text inthree quotation marks (see below).

Save the above program as write-html.py and execute it. Use File ->Open in your chosen text editor to open helloworld.html to verify thatyour program actually created the file. The content should look likethis:

Now go to your Firefox browser and choose File -> New Tab, go to thetab, and choose File -> Open File. Select helloworld.html. Youshould now be able to see your message in the browser. Take a moment tothink about this: you now have the ability to write a program which canautomatically create a webpage. There is no reason why you could notwrite a program to automatically create a whole website if you wantedto.

Using Python to Control Firefox

We automatically created an HTML file, but then we had to leave oureditor and go to Firefox to open the file in a new tab. Wouldn’t it becool to have our Python program include that final step? Type or copythe code below and save it as write-html-2.py. When you execute it, itshould create your HTML file and then automatically open it in a new tabin Firefox. Sweet!

Mac Instructions

Mac users will have to specify to the precise location of the .htmlfile on their computer. To do this, locate the programming-historianfolder you created to do these tutorials, right-click it and select “GetInfo”.

You can then cut and paste the file location listed after “Where:” andmake sure you include a trailing slash (/) to let the computer know youwant something inside the directory (rather than the directory itself).

If you’re getting a “File not found” error you haven’t changed thefilename path correctly.

Windows Instructions

***

Not only have you written a Python program that can write simple HTML,but you’ve now controlled your Firefox browser using Python. In the nextlesson, we turn to outputting the data that we have collected as an HTMLfile.

Suggested Readings

• Lutz, Learning Python
  • Re-read and review Chs. 1-17

Code Syncing

To follow along with future lessons it is important that you have theright files and programs in your “programming-historian” directory. Atthe end of each lesson in the series you can download the “programming-historian” zipfile to make sure you have the correct code. If you are following alongwith the Mac / Linux version you may have to open the obo.py file andchange “file:///Users/username/Desktop/programming-historian/” to thepath to the directory on your own computer.

• python-lessons6.zip zip sync

A file path describes the location of a file in a web site's folder structure.

File Path Examples

HTML File Paths

A file path describes the location of a file in a web site's folder structure.

File paths are used when linking to external files, like:

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• Web pages
• Images
• Style sheets
• JavaScripts

Absolute File Paths

An absolute file path is the full URL to a file:

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Example

The <img> tag is explained in the chapter: HTML Images.

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Relative File Paths

A relative file path points to a file relative to the current page.

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In the following example, the file path points to a file in the images folder located at the root of the current web:

In the following example, the file path points to a file in the images folder located in the current folder:

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In the following example, the file path points to a file in the images folder located in the folder one level up from the current folder:

Best Practice

It is best practice to use relative file paths (if possible).

When using relative file paths, your web pages will not be bound to your current base URL. All links will work on your own computer (localhost) as well as on your current public domain and your future public domains.