[tor-bugs] #9975 [Flashproxy]: use argparse rather than getopt

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#9975: use argparse rather than getopt
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     Reporter:  infinity0    |      Owner:  dcf
         Type:  enhancement  |     Status:  new
     Priority:  minor        |  Milestone:
    Component:  Flashproxy   |    Version:
   Resolution:               |   Keywords:
Actual Points:               |  Parent ID:
       Points:               |
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Comment (by dcf):

 Replying to [comment:2 infinity0]:
 > In argparse, there are two stages - you configure your parser
 (`add_argument`), then you do the parsing (`parse_args` then process the
 `Namespace` object that comes out of it).
 >
 > Some options really belong to utility modules - for example `--unsafe-
 logging` is only used by the logging code and safe_str. We can move this
 code into the common library, and also put the configuration there
 (`add_module_opts`), as well as processing of the `Namespace` object
 (`_parse_module_opts`).
 >
 > It works essentially as you want - the internal options class (or
 whatever other representation we choose) could remain, and we'd just
 process the `Namespace` object to populate it. So for the `# do something`
 example, this might be `flashproxy_util_options.unsafe_logging =
 parsed_opts.unsafe_logging`.

 That sounds good. That `--unsafe-logging` is a good example.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/9975#comment:3>
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