[tor-bugs] #18341 [Chutney]: Chutney won't run because some print() statements are borken

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#18341: Chutney won't run because some print() statements are borken
---------------------------+-------------------
     Reporter:  isis       |      Owner:  nickm
         Type:  defect     |     Status:  new
     Priority:  Very High  |  Milestone:
    Component:  Chutney    |    Version:
     Severity:  Normal     |   Keywords:
Actual Points:             |  Parent ID:
       Points:             |    Sponsor:
---------------------------+-------------------
 {{{
 The above is a description of an error in a Python program.  Here is
 the original traceback:

 Traceback (most recent call last):
   File "/usr/lib/python2.7/runpy.py", line 162, in _run_module_as_main
     "__main__", fname, loader, pkg_name)
   File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
     exec code in run_globals
   File "/home/isis/code/torproject/chutney/lib/chutney/TorNet.py", line
 1180, in <module>
     sys.exit(main())
   File "/home/isis/code/torproject/chutney/lib/chutney/TorNet.py", line
 1174, in main
     result = runConfigFile(args['action'], f)
   File "/home/isis/code/torproject/chutney/lib/chutney/TorNet.py", line
 1151, in runConfigFile
     return getattr(network, verb)()
   File "/home/isis/code/torproject/chutney/lib/chutney/TorNet.py", line
 841, in configure
     b.preConfig(network)
   File "/home/isis/code/torproject/chutney/lib/chutney/TorNet.py", line
 320, in preConfig
     self._genAuthorityKey()
   File "/home/isis/code/torproject/chutney/lib/chutney/TorNet.py", line
 387, in _genAuthorityKey
     "path, or put the binary into $PATH.") % tor_gencert
 TypeError: unsupported operand type(s) for %: 'NoneType' and 'str'
 }}}

 Umm… the `%` operator goes ''inside'' the `print()` function call.
 Otherwise, you're attempting to do a format string operation on the return
 value of the `print()` function (which is `None`).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18341>
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