PDF and Word documents are binary files, which makes them much more complex than plaintext files. In addition to text, they store lots of font, color, and layout. All of you must be familiar with what PDFs are. In-fact, they are one of the most important and widely used digital media. PDF stands for Portable Document. Python can read PDF files and print out the content after extracting the text from it. For that we have to first install the required module which is PyPDF2. Below is.
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Being a high-level, interpreted language with a relatively easy syntax, Python is perfect even for those who don't have prior programming. The only pure-python package that I know off which will create PDF's for you is ReportLab, which have both a paid and free version. I have only used the free. I suggest pyPdf. It works really nice. I also wrote a blog post some while ago, you can find it here.
The documentation does not explain how these are set or modified however, if you look closely at the API and the source code, it would appear that you would have to do the following at the beginning of your code:.
You can draw lines, ellipses and rectangles. The line width defaults to 0. The output looks like this:. When you draw a shape like an ellipse or a rect , you will need to pass in the x and y coordinates that represent the upper left corner of the drawing.
Then you will want to pass in the width and height of the shape. In this example, we fill the ellipse and use the default for the rectangle. The result ends up looking like this:. If you happen to try to use an animated GIF, only the first frame is used.
Also of note is that if you add the same image multiple times to the document, PyFPDF is smart enough to only embed one actual copy of the image. The new piece of code here is the call to the image method.
Its signature looks like the this:. You specify the image file path, the x and y coordinate and the width and height. If you only specify the width or the height, the other is calculated for you and attempts to maintain the original proportions of the image. You can also specify the file type explicitly, otherwise it is guessed from the file name. PyFPDF had multipage support enabled by default.
If you add enough cells to a page, it will automatically create a new page and continue to add your new text to the next page.
Here is a simple example:. All this does is create lines of text. The FPDF class just needs to be sub-classed and the the header and footer methods overridden to make them work.
The first section that we want to look at is the header method:. Here we just hard-code in the logo image that we want to use and then we set the font that we will be using in our header. Next we add an address and we position that address to the right of the image.
So if we want to move our text over to the right, then we need to create a cell with a number of units of measurement. In this case, we move the next three lines over to the right by adding a cell of mm.
Then we add a line break at the end, which should add 20 mm of vertical space. The first thing we do here is set the y-position of the origin on the page to mm or -1 cm.
Then we set our font for the footer. Finally we create the page number text. The last step in the footer is to write the page text on the page and center it. We also set the font for the portion of the page that is not taken up by the header or footer. Then we write 50 lines of text to the document to make it create a multipage PDF.
Instead you have to build your tables using cells or HTML. Leave the Execution settings as "Me". Warning: If you share the link in a public place, people may abuse the service and spam it with automatic requests.
Google may lock your account for abuse if this happens, so keep the link safe. Hit the Deploy button and make a note of the URL that you see on the next pop up. Add "? Updating the application If you see an error instead, or don't get a response, you probably made a mistake in the code. You can change it and update the deployment in the same way as you initially deployed it. The update screen is only slightly different from the deploy screen.
The only tricky thing is that you have to select "New" as the version for every change you make. If you make changes to the code and Update a previous version, the changes won't take effect, which is not obvious from the UI. You can see it took me a few tries to get this right. Creating our invoices from Python We can now create invoices and save them locally from a Python script.
The following code shows how to generate three invoices in a for loop. You've probably noticed that this is quite a "hacky" solution to generate PDF files from inside Python. The "replace" functionality is quite limited compared to a proper templating language, and passing data through a get request also has limitations. If you pass through anything more complicated than an invoice ID, you'll to URL encode the data first. You can do this in Python using the urllib. An example modification of the Python script to deal with more complicated data is as follows.
Arial is getting remapped to Helvetica in the actual source code, so you are not really using Arial at all.
The next step is to create a page and then loop over the core fonts. If there is one, we skip that font. Otherwise we set the font and the font size and write it out. We also increase the font size by two points each time through the loop.
However the number of core fonts is pretty small. This is a really simply way to add fonts though and will probably work. You can draw lines, ellipses and rectangles. The line width defaults to 0. Then you will want to pass in the width and height of the shape. In this example, we fill the ellipse and use the default for the rectangle. If you happen to try to use an animated GIF, only the first frame is used. Also of note is that if you add the same image multiple times to the document, PyFPDF is smart enough to only embed one actual copy of the image.
If you only specify the width or the height, the other is calculated for you and attempts to maintain the original proportions of the image. You can also specify the file type explicitly, otherwise it is guessed from the file name. If you add enough cells to a page, it will automatically create a new page and continue to add your new text to the next page.