(numerator, denominator)
| 61 | tol = 2 ** -23 |
| 62 | |
| 63 | def ratio(numerator, denominator): |
| 64 | try: |
| 65 | ratio = float(numerator)/float(denominator) |
| 66 | except ZeroDivisionError: |
| 67 | # 0/0 is undefined, but 1.0 yields more useful results |
| 68 | return 1.0 |
| 69 | if ratio < 0.0: |
| 70 | if ratio < -tol: |
| 71 | sys.stderr.write('warning: negative ratio (%s/%s)\n' % (numerator, denominator)) |
| 72 | return 0.0 |
| 73 | if ratio > 1.0: |
| 74 | if ratio > 1.0 + tol: |
| 75 | sys.stderr.write('warning: ratio greater than one (%s/%s)\n' % (numerator, denominator)) |
| 76 | return 1.0 |
| 77 | return ratio |
| 78 | |
| 79 | |
| 80 | class UndefinedEvent(Exception): |
no test coverage detected