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    <p>I ended up writing a Python script to do more or less what I wanted.</p> <pre><code>#!/usr/bin/env python import sys import re from optparse import OptionParser from math import fabs splitPattern = re.compile(r',|\s+|;') class FailObject(object): def __init__(self, options): self.options = options self.failure = False def fail(self, brief, full = ""): print "&gt;&gt;&gt;&gt; ", brief if options.verbose and full != "": print " ", full self.failure = True def exit(self): if (self.failure): print "FAILURE" sys.exit(1) else: print "SUCCESS" sys.exit(0) def numSplit(line): list = splitPattern.split(line) if list[-1] == "": del list[-1] numList = [float(a) for a in list] return numList def softEquiv(ref, target, tolerance): if (fabs(target - ref) &lt;= fabs(ref) * tolerance): return True #if the reference number is zero, allow tolerance if (ref == 0.0): return (fabs(target) &lt;= tolerance) #if reference is non-zero and it failed the first test return False def compareStrings(f, options, expLine, actLine, lineNum): ### check that they're a bunch of numbers try: exp = numSplit(expLine) act = numSplit(actLine) except ValueError, e: # print "It looks like line %d is made of strings (exp=%s, act=%s)." \ # % (lineNum, expLine, actLine) if (expLine != actLine and options.checkText): f.fail( "Text did not match in line %d" % lineNum ) return ### check the ranges if len(exp) != len(act): f.fail( "Wrong number of columns in line %d" % lineNum ) return ### soft equiv on each value for col in range(0, len(exp)): expVal = exp[col] actVal = act[col] if not softEquiv(expVal, actVal, options.tol): f.fail( "Non-equivalence in line %d, column %d" % (lineNum, col) ) return def run(expectedFileName, actualFileName, options): # message reporter f = FailObject(options) expected = open(expectedFileName) actual = open(actualFileName) lineNum = 0 while True: lineNum += 1 expLine = expected.readline().rstrip() actLine = actual.readline().rstrip() ## check that the files haven't ended, # or that they ended at the same time if expLine == "": if actLine != "": f.fail("Tested file ended too late.") break if actLine == "": f.fail("Tested file ended too early.") break compareStrings(f, options, expLine, actLine, lineNum) #print "%3d: %s|%s" % (lineNum, expLine[0:10], actLine[0:10]) f.exit() ################################################################################ if __name__ == '__main__': parser = OptionParser(usage = "%prog [options] ExpectedFile NewFile") parser.add_option("-q", "--quiet", action="store_false", dest="verbose", default=True, help="Don't print status messages to stdout") parser.add_option("--check-text", action="store_true", dest="checkText", default=False, help="Verify that lines of text match exactly") parser.add_option("-t", "--tolerance", action="store", type="float", dest="tol", default=1.e-15, help="Relative error when comparing doubles") (options, args) = parser.parse_args() if len(args) != 2: print "Usage: numdiff.py EXPECTED ACTUAL" sys.exit(1) run(args[0], args[1], options) </code></pre>
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    1. USSeth Johnson
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