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POReloading a python file once a minute
 

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  1. POReloading a python file once a minute
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    <p>I have an IRC bot and I'm parsing data, but to make it refresh I have to reload the plugin.I've noticed it works once I change something on the file or just open and save it again, once it reloads it gets the right info. That's the file that reloads the plugin:</p> <p><strong>reload.py</strong></p> <pre><code>import collections import glob import os import re import sys import traceback if 'mtimes' not in globals(): mtimes = {} if 'lastfiles' not in globals(): lastfiles = set() def make_signature(f): return f.func_code.co_filename, f.func_name, f.func_code.co_firstlineno def format_plug(plug, kind='', lpad=0, width=40): out = ' ' * lpad + '%s:%s:%s' % make_signature(plug[0]) if kind == 'command': out += ' ' * (50 - len(out)) + plug[1]['name'] if kind == 'event': out += ' ' * (50 - len(out)) + ', '.join(plug[1]['events']) if kind == 'regex': out += ' ' * (50 - len(out)) + plug[1]['regex'] return out def reload(init=False): changed = False if init: bot.plugs = collections.defaultdict(list) bot.threads = {} core_fileset = set(glob.glob(os.path.join("core", "*.py"))) for filename in core_fileset: mtime = os.stat(filename).st_mtime if mtime != mtimes.get(filename): mtimes[filename] = mtime changed = True try: eval(compile(open(filename, 'U').read(), filename, 'exec'), globals()) except Exception: traceback.print_exc() if init: # stop if there's an error (syntax?) in a core sys.exit() # script on startup continue if filename == os.path.join('core', 'reload.py'): reload(init=init) return fileset = set(glob.glob(os.path.join('plugins', '*.py'))) # remove deleted/moved plugins for name, data in bot.plugs.iteritems(): bot.plugs[name] = [x for x in data if x[0]._filename in fileset] for filename in list(mtimes): if filename not in fileset and filename not in core_fileset: mtimes.pop(filename) for func, handler in list(bot.threads.iteritems()): if func._filename not in fileset: handler.stop() del bot.threads[func] # compile new plugins for filename in fileset: mtime = os.stat(filename).st_mtime if mtime != mtimes.get(filename): mtimes[filename] = mtime changed = True try: code = compile(open(filename, 'U').read(), filename, 'exec') namespace = {} eval(code, namespace) except Exception: traceback.print_exc() continue # remove plugins already loaded from this filename for name, data in bot.plugs.iteritems(): bot.plugs[name] = [x for x in data if x[0]._filename != filename] for func, handler in list(bot.threads.iteritems()): if func._filename == filename: handler.stop() del bot.threads[func] for obj in namespace.itervalues(): if hasattr(obj, '_hook'): # check for magic if obj._thread: bot.threads[obj] = Handler(obj) for type, data in obj._hook: bot.plugs[type] += [data] if not init: print '### new plugin (type: %s) loaded:' % \ type, format_plug(data) if changed: bot.commands = {} for plug in bot.plugs['command']: name = plug[1]['name'].lower() if not re.match(r'^\w+$', name): print '### ERROR: invalid command name "%s" (%s)' % (name, format_plug(plug)) continue if name in bot.commands: print "### ERROR: command '%s' already registered (%s, %s)" % \ (name, format_plug(bot.commands[name]), format_plug(plug)) continue bot.commands[name] = plug bot.events = collections.defaultdict(list) for func, args in bot.plugs['event']: for event in args['events']: bot.events[event].append((func, args)) if init: print ' plugin listing:' if bot.commands: # hack to make commands with multiple aliases # print nicely print ' command:' commands = collections.defaultdict(list) for name, (func, args) in bot.commands.iteritems(): commands[make_signature(func)].append(name) for sig, names in sorted(commands.iteritems()): names.sort(key=lambda x: (-len(x), x)) # long names first out = ' ' * 6 + '%s:%s:%s' % sig out += ' ' * (50 - len(out)) + ', '.join(names) print out for kind, plugs in sorted(bot.plugs.iteritems()): if kind == 'command': continue print ' %s:' % kind for plug in plugs: print format_plug(plug, kind=kind, lpad=6) print </code></pre> <p>Let's say the plugin I want to reload once a minute is called <strong>flightsinfo.py</strong>. How can I do that ?</p>
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    1. USTom Jenkins
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    1. COInstead of reloading the Python script, you really ought to figure out __why__ it's not working after the function in it is called again, and fix that instead.
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      1. USFredrick Brennan
    2. CONo, the function works fine, I want to reload the file again to refresh the data.
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      1. USTom Jenkins
    3. COReloading a Python module to refresh *data* is horrendous design...
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      1. POReloading a python file once a minute
      1. USJon Clements
 

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