Re: Barcodes
Ronn Ross wrote: I found this library, but no documentation(https://cybernetics.hudora.biz/projects/wiki/huBarcode). Has anyone used this or know of a similar library with better documentation? Yup, reportlab has really good barcode generation stuff. I use it to generate labels with barcodes on for asset tracking :-) http://the-gay-bar.com/index.php?/archives/221-Howto-generate-barcodes-in-Python-with-reportlab/ Chris -- Simplistix - Content Management, Batch Processing Python Consulting - http://www.simplistix.co.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: Barcodes
On Wed, Aug 19, 2009 at 9:19 AM, Ronn Ross ronn.r...@gmail.com wrote: I was hoping that python would have a library to help me print my own bar codes? We will need labels in all sizes and most label printer just work with 1 or 2 sizes. I would like to just print a grid of different sizes on standard paper. Does python have a bar code printing library? On Mon, Aug 17, 2009 at 4:55 PM, Tim Chase python.l...@tim.thechases.comwrote: My company needs a small inventory management app. Does python have any libraries to help with reading and writing bar codes? I've written bar code apps and python really doesn't enter into that part of things. Printers generally have bar code printing capabilities so you just send the right escape sequences and you get the bar codes. To read them, bar code readers scan and translate before sending the values through typically a keyboard wedge or serial port. To add to what Emile mentions, most barcode readers present a keyboard-wedge interface, so that scanning a barcode merely appears as if you typed it at the keyboard (USB readers show up as a HID profile). Often they'll have configuration barcodes that you can scan to tweak the profile (such as pressing enter, tab or an arrow-key after sending the barcode; controlling beep tone volume, etc). For printing barcodes, you can use any number of solutions -- the most popular usually just involves installing a barcode font and then rendering text in that font to your desired output canvas. I believe there are some native rendering solutions as well, but I've not investigated since the font method was more than sufficient for my wants. -tkc -- http://mail.python.org/mailman/listinfo/python-list I found this library, but no documentation( https://cybernetics.hudora.biz/projects/wiki/huBarcode). Has anyone used this or know of a similar library with better documentation? -- http://mail.python.org/mailman/listinfo/python-list
Re: Printing Barcodes from webapp?
Dennis Lee Bieber wrote: On Tue, 05 Dec 2006 18:19:58 GMT, Dennis Lee Bieber [EMAIL PROTECTED] declaimed the following in comp.lang.python: Aye, just the Postnet scheme... The difficult part was working out the spacing for the dot-matrix printer; the rest was just using the Zipcode digits as an index into byte-strings of MX-80 codes. I've recently downloaded the 4-state spec from USPS... That thing is obscene... At least Postnet could be decoded visually with a simple chart. 4-state distributes bits all over! well the code in reportlab/graphics/barcodes that deals with it should be adaptable if you're interested (only around 300 lines). I have a feeling that the UK/AU 4state codes aren't as exotic, but not having actually implemented them it's hard to say. -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
Re: Printing Barcodes from webapp?
Dennis Lee Bieber [EMAIL PROTECTED] writes: On 04 Dec 2006 12:41:59 +, [EMAIL PROTECTED] (John J. Lee) declaimed the following in comp.lang.python: digits, through complicated encodings (my colleague Robin tells me US postal bar codes were a particular pain), up to funny-looking 2D bar Really? I seem to recall coding a GW-BASIC/Epson MX-80 compatible routine to take a zip-code and produce the bar-code for it, on a TRS-80 Mod 4. Wasn't for my use -- a co-worker wanted it (and had the manual of markings allowed on an envelope). Apparently there's a new US postal barcode, a four state barcode. Presumably you drew the older simpler ones back when you were using the TRS-80... John -- http://mail.python.org/mailman/listinfo/python-list
Re: Printing Barcodes from webapp?
Andy Dingley [EMAIL PROTECTED] writes: Burhan wrote: Is there an easy way to generate barcodes using Python Easy way for any application or language to generate barcodes is to install a barcode font on the client machine, then just generate a suitable text string for it. This is _very_ easy, if you can get the font deployed. I usually find myself using Code 39 and printing them from a HTML document. There are plenty of free code 39 fonts around and the string mangling to get the barcode structured correctly is just a trivial prefix / suffix. Sometimes that's really convenient. Depending on the barcode, this may not always be easy, though. Certainly there are some complications, ranging from things like relatively simple check digits, through complicated encodings (my colleague Robin tells me US postal bar codes were a particular pain), up to funny-looking 2D bar codes like PDF417, that have lots of complicated rules associated with them. The ReportLab open source toolkit barcode support handles this kind of thing for you -- for the barcodes it supports, anyway. John -- http://mail.python.org/mailman/listinfo/python-list
Re: Printing Barcodes from webapp?
Burhan wrote: Hello Group: I am in the planning stages of an application that will be accessed over the web, and one of the ideas is to print a barcode that is generated when the user creates a record. The application is to track paperwork/items and uses barcodes to easily identify which paper/item belongs to which record. Is there an easy way to generate barcodes using Python -- considering the application will be printing to a printer at the client's machine? I thought of two ways this could be done; one would be to interface with the printing options of the browser to ensure that margins, headers, footers are setup properly (I have done this before using activex and IE, but with mixed results); the other would be to install some small application at the client machine that would intercept the print jobs and format them properly (taking the printing function away from the browser). Does anyone have any experience or advice? Any links I could read up on to help me find out how to program this? Another way (easier hopefully) to accomplish this? I think one of the easiest ways is to install acrobat reader and redirect client browser to a generated pdf file. http://www.reportlab.org/ has support for generating barcodes (and more) in pdf documents. -- Leo -- http://mail.python.org/mailman/listinfo/python-list
Re: Printing Barcodes from webapp?
Burhan wrote: Is there an easy way to generate barcodes using Python -- considering the application will be printing to a printer at the client's machine? here are some barcode generators for Python: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/426069 http://www.cgpp.com/bookland/ http://www.reportlab.org (see the graphics.barcode subpackage) /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Printing Barcodes from webapp?
Burhan wrote: Is there an easy way to generate barcodes using Python Easy way for any application or language to generate barcodes is to install a barcode font on the client machine, then just generate a suitable text string for it. This is _very_ easy, if you can get the font deployed. I usually find myself using Code 39 and printing them from a HTML document. There are plenty of free code 39 fonts around and the string mangling to get the barcode structured correctly is just a trivial prefix / suffix. -- http://mail.python.org/mailman/listinfo/python-list
Re: Printing Barcodes from webapp?
Andy Dingley wrote: Burhan wrote: Is there an easy way to generate barcodes using Python Easy way for any application or language to generate barcodes is to install a barcode font on the client machine, then just generate a suitable text string for it. This is _very_ easy, if you can get the font deployed. I usually find myself using Code 39 and printing them from a HTML document. There are plenty of free code 39 fonts around and the string mangling to get the barcode structured correctly is just a trivial prefix / suffix. I thought about this as an option too, but I do not have control over the client machines, maybe I'll use this and go with the PDF idea mentioned above. Thanks for all the links, I have some reading to do now. -- http://mail.python.org/mailman/listinfo/python-list
Printing Barcodes from webapp?
Hello Group: I am in the planning stages of an application that will be accessed over the web, and one of the ideas is to print a barcode that is generated when the user creates a record. The application is to track paperwork/items and uses barcodes to easily identify which paper/item belongs to which record. Is there an easy way to generate barcodes using Python -- considering the application will be printing to a printer at the client's machine? I thought of two ways this could be done; one would be to interface with the printing options of the browser to ensure that margins, headers, footers are setup properly (I have done this before using activex and IE, but with mixed results); the other would be to install some small application at the client machine that would intercept the print jobs and format them properly (taking the printing function away from the browser). Does anyone have any experience or advice? Any links I could read up on to help me find out how to program this? Another way (easier hopefully) to accomplish this? Thanks for any advice. -- http://mail.python.org/mailman/listinfo/python-list
Re: Reportlab and Barcodes
That looks cleaner than mine. I had to do this - # Register the barcode true-type-font # Don't want to push the font out to everyone in the office... from reportlab.pdfbase import pdfmetrics from reportlab.pdfbase.ttfonts import TTFont pdfmetrics.registerFont( TTFont( 'barcode', r'c:\inetpub\wwwroot\barcode\fre3of9x.ttf')) # 'c' is the canvas c.setFont( barcode, 40 ) c.drawString( x * inch, y * inch, text ) jw On Wed, 09 Feb 2005 11:25:22 -0800 (PST), Josh [EMAIL PROTECTED] wrote: One of the users on the Reportlabs mailing list was kinda enough to offer me the solution.. A simple call to the drawOn function, e.g.: bc = code39.Standard39(123,xdim = .015*inch) x = 6*inch y = -5*inch bc.drawOn(canvas,x,y) -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Reportlab and Barcodes
Damjan, Code39 here refers to part of the Barcode Extensions available to Reportlabs. It can be imported as such from reportlab.extensions.barcode import code39 Josh -- http://mail.python.org/mailman/listinfo/python-list
Re: Reportlab and Barcodes
Josh wrote: I need someone to explain to me how to output a Code39 barcode to a Reportlab PDF. This may not help you directly, but I've made use of it in the past: a very nice and totally free 3 of 9 TrueType font. http://www.barcodesinc.com/free-barcode-font/ -- Benji -- http://mail.python.org/mailman/listinfo/python-list
Re: Reportlab and Barcodes
Benji, I have used those very same fonts before and they work great, but I'm trying to get away with using straight Python to accomplish this, especially since the program will most likely be used on both Linux and Windows. Josh -- http://mail.python.org/mailman/listinfo/python-list
Re: Reportlab and Barcodes
One of the users on the Reportlabs mailing list was kinda enough to offer me the solution.. A simple call to the drawOn function, e.g.: bc = code39.Standard39(123,xdim = .015*inch) x = 6*inch y = -5*inch bc.drawOn(canvas,x,y) -- http://mail.python.org/mailman/listinfo/python-list
Re: Reportlab and Barcodes
One of the users on the Reportlabs mailing list was kinda enough to offer me the solution.. A simple call to the drawOn function, e.g.: bc = code39.Standard39(123,xdim = .015*inch) whats code39 in this example? x = 6*inch y = -5*inch bc.drawOn(canvas,x,y) -- damjan -- http://mail.python.org/mailman/listinfo/python-list
Reportlab and Barcodes
Hi All, I need someone to explain to me how to output a Code39 barcode to a Reportlab PDF. As far as I can tell, there is no means to do this with the Canvas object, and the demo that is included with the libraries is using the platypus Frame to place the barcode on the form. I do not wish to use this method. I'm guessing that it needs to be placed on the form as some type of graphic. It's obviously not going to work with the drawText method. Any ideas? Thanks Josh -- http://mail.python.org/mailman/listinfo/python-list
