IronPython’s missing csv

Posted: May 16th, 2011 | Filed under: IronPython, Programming
Author: Tom
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Python already has a great csv module, but since it is implemented in C, it’s not available to IronPython. IronPython.info has a suggested workaround using an external library. But for some reason I just chose to write something really simple myself. Since for my purposes today I didn’t actually need to do any writing to file, I just have a csv reader.

This is my really simple csv reader. I’m calling it, icsv.py. There’s a million things it doesn’t handle yet, but it covered what I happened to need today. Maybe I’ll expand it as the situation warrants.

class reader:
    def __init__(self,path,delimiter=','):
        self.File = open(path, "r")
        self.Delimiter = delimiter
        self.Header = self.File.readline().replace('\n','').split(delimiter)
        self.__curr_line = None
	
    def canread(self):
        return not self.File.closed
	
    def stop(self):
        self.File.close()
	
    def nextline(self):
        if self.File.closed: return None
			
        curr = self.File.readline()
		
        if not curr: 
            self.File.close()
            return None
		
        self.__curr_line = curr
		
        ## no quoted text return the easy way...
        if curr.find('"') == -1:
            return dict(zip(self.Header,self.__curr_line.replace('\n','').split(self.Delimiter)))
			
        line = dict()
        for h in self.Header:
            if not curr.startswith('"'):
                line[h], s, curr = curr.partition(',')
            else:
                clsq = curr.find('"',1)+1
                line[h] = curr[0:clsq]
                curr = curr[clsq+1:]
					
        return line

Tags: IronPython, read csv file

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