file wrapper class with Parser

ParseDemo.py

#Python: Just wanted to share the how I used a custom file wrapper class for my Parser class to use so that I could avoid reading in the entire file and open and close it 
#once (definitions omitted)

class FileHandler:
"""A class to handle file opening and closing."""
def __init__(self, filename):

def getPermissions( self) :

def openFileWithPermissions(self, permissionString):

def getFileObject(self):

def closeFile(self):

def getLine(self):

def writeLine(self, string):

def isEndOfFile(self):

def length(self):

def saveSpot(self):

def resumeFromSave(self) :

def reset(self):


#With this I was able to do a nifty thing with my hasMoreCommands function. I could just perform a lookahead for any more legit commands.

def hasMoreCommands(self):
"""Are there more commands in the input?"""
# if we are at the end of the file then no
if self.file.isEndOfFile() :
return 0
else :
# else we need to go see. Be right back
self.file.saveSpot()
while( not self.file.isEndOfFile() ) :

testLine = self.file.getLine()
testLine = self.preprocess(testLine)

# yep found a command
if self.isCommand(testLine):
# I'll put your file back to where you where
self.file.resumeFromSave()
return 1

# no command found
self.file.resumeFromSave()
return 0