Handle gracefully the instance where config files are not present. Compatible with python versions 2.5, 2.6 and 2.7. The try/except is forward compatible with python version 3 once the entire script is ported.
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| @@ -94,8 +94,13 @@ def main(): · 93 unmodified lines | |||
| 94 | configa_filename = sys.argv[1] | 94 | configa_filename = sys.argv[1] |
| 95 | configb_filename = sys.argv[2] | 95 | configb_filename = sys.argv[2] |
| 96 | 96 | ||
| 97 | a = readconfig(file(configa_filename)) | 97 | try: |
| 98 | b = readconfig(file(configb_filename)) | 98 | a = readconfig(file(configa_filename)) |
| 99 | b = readconfig(file(configb_filename)) | ||
| 100 | except (IOError): | ||
| 101 | e = sys.exc_info()[1] | ||
| 102 | print("I/O error[%s]: %s\n" % (e.args[0],e.args[1])) | ||
| 103 | usage() | ||
| 99 | 104 | ||
| 100 | # print items in a but not b (accumulate, sort and print) | 105 | # print items in a but not b (accumulate, sort and print) |
| 101 | old = [] | 106 | old = [] |