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pythonhtmlcss
VikkyB
VikkyB

Reputation: 1450

Python CSS Parser

I am experimenting with CSS files in Python to assist colour blind people. I need to get inside every selector block and change the 'background:' and 'color:'. I tried using CSS parsers like tinycss but they are not concentrating on getting selectors.

Example input:

body {background:#fff; color:#ccc}

And output:

body {background:#000; color:#aaa}

Upvotes: 8

Views: 4690

Answers (2)

VikkyB
VikkyB

Reputation: 1450

I solved this problem by using regular expressions. So I kind of ended up making my own parser. I formed a regular expression to search for color patterns such as #XXX, #XXXXXX, rgb(X,X,X), hsl(X,X,X) in the CSS file, maintained a list to keep the positions they are in the CSS file. Then I just re-wrote all the colors at the positions specified by list. This is the best summary I can give for what I did. Please add comment if you need a very detailed explanation. Thank you.

Upvotes: 2

Dmitry Zagorulkin
Dmitry Zagorulkin

Reputation: 8548

try this:

http://cthedot.de/cssutils/

parser = CSSParser()
# optionally
parser.setFetcher(fetcher)
sheet = parser.parseFile('test1.css', 'ascii')
print sheet.cssText

it's pretty simple to use in css processing.

to work with selectors you could use cssutils.css.SelectorList and cssutils.css.Selector

Upvotes: 2

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