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"simple" file parser i am making

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Join Date: Jul 2008

Posts: 3

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dz0004455

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"simple" file parser i am making

Jul 14th, 2008

I have an html file and I am parsing it with regular expressions. I don't want to use any python html libraries, because I am not using it as a website, but as a configuration type file. I am making a basic bookmarks system, the parser works fine, so I guess my question is about the second part, writing to the files. The file looks like this

 Help with Code Tags 
 html Syntax (Toggle Plain Text) 
<html>
<head>
<title>my bookmarks</title>
</head>
<body>
<div id="smalltalk">
<a href="http://www.smalltalk.org">Smalltalk.org</a>
</div>
<div id="python">
<a href="http://www.python.org">Python.org</a>
</div>
</body>
</html>
<html>
<head>
<title>my bookmarks</title>
</head>
<body>
<div id="smalltalk">
<a href="http://www.smalltalk.org">Smalltalk.org</a>
</div>
<div id="python">
<a href="http://www.python.org">Python.org</a>
</div>
</body>
</html>

My parser call the div's sections, and I want to write a method to insert more sections before the /body and /html tags.

The question, without all of my other information is, how do I INSERT text into a file with python, without deleting the text after it.

Last edited by Tekmaven; Jul 14th, 2008 at 11:00 pm. Reason: Added code tags

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Join Date: May 2008

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Capt.Micro Capt.Micro is offline

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Re: "simple" file parser i am making

Jul 14th, 2008

Well, I dont know where you want to insert the text, aka: between the <body> and </body> or between the </body> and </html> but, if you need to write at a specific line you could always copy the text before you write to it, then append the file with open(file, 'a') and then add the text you have copied before, maybe like so(write after the </body> tag):

 Help with Code Tags 
 python Syntax (Toggle Plain Text) 
FILE = open('file.txt', 'a')
lines = FILE.readlines()
lineNum=0
currLine=0
#Find the </body> line
for line in lines:
    if line == "</body>":
        lineNum=currLine
        break
    currLine+=1
#Write to the list
lines.insert(lineNum+1, "Data, text, or anything you need to insert!")
FILE.close()
#Open file and clear it
FILE = open('file.txt', 'w')
#Write old data and new data (in list: lines)
for line in lines:
    FILE.write(line)
FILE.close()
FILE = open('file.txt', 'a')
lines = FILE.readlines()
lineNum=0
currLine=0
#Find the </body> line
for line in lines:
    if line == "</body>":
        lineNum=currLine
        break
    currLine+=1
#Write to the list
lines.insert(lineNum+1, "Data, text, or anything you need to insert!")
FILE.close()
#Open file and clear it
FILE = open('file.txt', 'w')
#Write old data and new data (in list: lines)
for line in lines:
    FILE.write(line)
FILE.close()