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| 54 | <H2><A NAME="SECTION0051210000000000000000"></A><A NAME="traceback-example"></A> |
| 55 | <BR> |
| 56 | 3.12.1 Traceback Example |
| 57 | </H2> |
| 58 | |
| 59 | <P> |
| 60 | This simple example implements a basic read-eval-print loop, similar |
| 61 | to (but less useful than) the standard Python interactive interpreter |
| 62 | loop. For a more complete implementation of the interpreter loop, |
| 63 | refer to the <tt class="module"><a href="module-code.html">code</a></tt> module. |
| 64 | |
| 65 | <P> |
| 66 | <div class="verbatim"><pre> |
| 67 | import sys, traceback |
| 68 | |
| 69 | def run_user_code(envdir): |
| 70 | source = raw_input(">>> ") |
| 71 | try: |
| 72 | exec source in envdir |
| 73 | except: |
| 74 | print "Exception in user code:" |
| 75 | print '-'*60 |
| 76 | traceback.print_exc(file=sys.stdout) |
| 77 | print '-'*60 |
| 78 | |
| 79 | envdir = {} |
| 80 | while 1: |
| 81 | run_user_code(envdir) |
| 82 | </pre></div> |
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| 118 | <span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span> |
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