code:

import re
source= open( 'PersonTest.txt', 'r' )
destination= open( 'PersonTest2.txt', 'w' )
lineMatch = re.compile('^public|^private|^protected')
line_offset = []
rightBracketCount = 0
leftBracketCount = 0
beginningLine = 0
engingLine = 0
lineNum = 0
insertionPoint = 0
variableCollection = []
offset = 0
i = 0
# Read in the file once and build a list of line offsets
for line in source:
        line_offset.append(offset)
        offset += len(line)
        i += 1
source.seek(0)
print "total lines = %d" % i

def write_to_file(beginningLine, endingLine, sourceFile, destinationFile, insertionPoint, variables):
    print "beginning line + %d" % beginningLine
    print "ending line + %d" % endingLine
    for currentLine in range(beginningLine, endingLine):
        sourceFile.seek(line_offset[currentLine])
        line = sourceFile.readline()
        if currentLine == insertionPoint and insertionPoint != 0:
                for instanceVariable in variables:
                        destinationFile.write(instanceVariable + "\n")
        if lineMatch.match(line) and line.find("\(") != -1:
                continue
        destinationFile.write(line + "\n")
#Counting the brackets, note the start of the class and the end of the class
for line in source:
        print lineNum
        if line.find("{") != -1:
                rightBracketCount += 1
                print "Count right bracket"
                #Mark the start of the class and the insertion point for where any
                #found instance variables should go
                if rightBracketCount == 1:
                        insertionPoint = lineNum + 1
        if line.find("}") != -1:
                leftBracketCount += 1
                print "Count left bracket"
                #If a line is found with a public/private/protected declaration, and it is
                #not a method because it does not contain a (, store the instance variable.
                if lineMatch.match(line) and line.find("\(") == -1:
                        print "found instance variable"
                        variableCollect.append(line)
                #When the end of the class is hit, call write_to_file and write the contents
                #of the lines scanned to a new file with instance variables at the top.
                #Then, erase all variables. Begin from ending line.
        if rightBracketCount == leftBracketCount and rightBracketCount != 0:
                print "End of class"
                endingLine = lineNum
                write_to_file(beginningLine, endingLine, source, destination, insertionPoint, variableCollection)
                rightBracketCount = 0
                leftBracketCount = 0
                insertionPoint = 0
                del variableCollection[:]
                beginningLine = endingLine + 1
        lineNum += 1