File compare

[Larry Bates]

Sounds a little like "homework", but I'll help you out.
There are lots of ways, but this works.

import sys
class fobject:
    def __init__(self, inputfilename):
        try:
            fp=open(inputfilename, 'r')
            self.lines=fp.readlines()
        except IOError:
            print "Unable to open and read inputfilename=%s" % inputfilename
            sys.exit(3)

        self.datadict={}
        for line in self.lines:
            line=line.strip()
            line=line.strip("'")
            key, values=line.split(' ',1)
            self.datadict[key]=values

        return

    def keys(self):
        return self.datadict.keys()

    def compare(self, otherobject):
        keys=otherobject.keys()
        match=0
        for key in keys:
            if self.datadict[key] == otherobject.datadict[key]: match+=1

        return float(match)/float(len(keys))

if __name__=="__main__":
    f1=fobject(r'f:\syscon\python\zbkup\f1.txt')
    f2=fobject(r'f:\syscon\python\zbkup\f2.txt')
    print f1.compare(f2)


Larry Bates


PyPK wrote:
> I have two files
> file1 in format
> <id> <val1> <test1> <test2>
> 'AA' 1 T T
> 'AB' 1 T F
> 
> file2 same as file1
> <id> <val1> <test1> <test2>
> 'AA' 1 T T
> 'AB' 1 T T
> 
> Also the compare should be based on id. So it should look for line
> starting with id 'AA' (for example) and then match the line  so if in
> second case.
> 
> so this is what I am looking for:
> 1. read both files.
> 2. read id of first line in file1 check if it matches with the same id
> in file2.
> 3. repeat step 2 for all lines in file1.
> 4. return a percent of success to failure. ie if one line matches and
> one lines does'nt then return 0.5 or 50%
> 
> I wrote a boolean version ..as a start
> 
> def getdata(f):
>     try:
>         f1 = open(f,'r')
>         data=[]
>         for eachline in f1.readlines():
>            data.append(re.split("",
>               re.sub('\n','',strip(re.split('\s\s+',eachline)[0]))))
>         return data
>     except IOError:
>         raise("Invalid File Input")
> 
> if __name__=='__main__':
> 
>         data1 = getdata('file1')
>         data2 = getdata('file2')
> 
>         if data1 == data2:
>             print "True"
>         else:
>             print "False"
> 
> hope I am clear...
>