Python builtins.reload方法代碼示例

# 需要導入模塊: import builtins [as 別名]
# 或者: from builtins import reload [as 別名]
def patch_reload():
    try:
        import __builtin__ as builtins
    except ImportError:
        import builtins

    if hasattr(builtins, "reload"):
        sys.builtin_orig_reload = builtins.reload
        builtins.reload = patched_reload(sys.builtin_orig_reload)  # @UndefinedVariable
        try:
            import imp
            sys.imp_orig_reload = imp.reload
            imp.reload = patched_reload(sys.imp_orig_reload)  # @UndefinedVariable
        except:
            pass
    else:
        try:
            import importlib
            sys.importlib_orig_reload = importlib.reload  # @UndefinedVariable
            importlib.reload = patched_reload(sys.importlib_orig_reload)  # @UndefinedVariable
        except:
            pass

    del builtins 

# 需要導入模塊: import builtins [as 別名]
# 或者: from builtins import reload [as 別名]
def cancel_patches_in_sys_module():
    sys.exc_info = sys.system_exc_info  # @UndefinedVariable
    try:
        import __builtin__ as builtins
    except ImportError:
        import builtins

    if hasattr(sys, "builtin_orig_reload"):
        builtins.reload = sys.builtin_orig_reload

    if hasattr(sys, "imp_orig_reload"):
        import imp
        imp.reload = sys.imp_orig_reload

    if hasattr(sys, "importlib_orig_reload"):
        import importlib
        importlib.reload = sys.importlib_orig_reload

    del builtins 

# 需要導入模塊: import builtins [as 別名]
# 或者: from builtins import reload [as 別名]
def reloadAll(prefix=None, debug=False):
    """Automatically reload everything whose __file__ begins with prefix.
    - Skips reload if the file has not been updated (if .pyc is newer than .py)
    - if prefix is None, checks all loaded modules
    """
    failed = []
    changed = []
    for modName, mod in list(sys.modules.items()):  ## don't use iteritems; size may change during reload
        if not inspect.ismodule(mod):
            continue
        if modName == '__main__':
            continue
        
        ## Ignore if the file name does not start with prefix
        if not hasattr(mod, '__file__') or os.path.splitext(mod.__file__)[1] not in ['.py', '.pyc']:
            continue
        if prefix is not None and mod.__file__[:len(prefix)] != prefix:
            continue
        
        ## ignore if the .pyc is newer than the .py (or if there is no pyc or py)
        py = os.path.splitext(mod.__file__)[0] + '.py'
        pyc = py + 'c'
        if py not in changed and os.path.isfile(pyc) and os.path.isfile(py) and os.stat(pyc).st_mtime >= os.stat(py).st_mtime:
            #if debug:
                #print "Ignoring module %s; unchanged" % str(mod)
            continue
        changed.append(py)  ## keep track of which modules have changed to insure that duplicate-import modules get reloaded.
        
        try:
            reload(mod, debug=debug)
        except:
            printExc("Error while reloading module %s, skipping\n" % mod)
            failed.append(mod.__name__)
        
    if len(failed) > 0:
        raise Exception("Some modules failed to reload: %s" % ', '.join(failed)) 

# 需要導入模塊: import builtins [as 別名]
# 或者: from builtins import reload [as 別名]
def updateFunction(old, new, debug, depth=0, visited=None):
    #if debug and depth > 0:
        #print "    -> also updating previous version", old, " -> ", new
        
    old.__code__ = new.__code__
    old.__defaults__ = new.__defaults__
    
    if visited is None:
        visited = []
    if old in visited:
        return
    visited.append(old)
    
    ## finally, update any previous versions still hanging around..
    if hasattr(old, '__previous_reload_version__'):
        maxDepth = updateFunction(old.__previous_reload_version__, new, debug, depth=depth+1, visited=visited)
    else:
        maxDepth = depth
        
    ## We need to keep a pointer to the previous version so we remember to update BOTH
    ## when the next reload comes around.
    if depth == 0:
        new.__previous_reload_version__ = old
    return maxDepth



## For classes:
##  1) find all instances of the old class and set instance.__class__ to the new class
##  2) update all old class methods to use code from the new class methods 

# 需要導入模塊: import builtins [as 別名]
# 或者: from builtins import reload [as 別名]
def reload(module, debug=False, lists=False, dicts=False):
    """Replacement for the builtin reload function:
    - Reloads the module as usual
    - Updates all old functions and class methods to use the new code
    - Updates all instances of each modified class to use the new class
    - Can update lists and dicts, but this is disabled by default
    - Requires that class and function names have not changed
    """
    if debug:
        print("Reloading %s" % str(module))
        
    ## make a copy of the old module dictionary, reload, then grab the new module dictionary for comparison
    oldDict = module.__dict__.copy()
    builtins.reload(module)
    newDict = module.__dict__
    
    ## Allow modules access to the old dictionary after they reload
    if hasattr(module, '__reload__'):
        module.__reload__(oldDict)
    
    ## compare old and new elements from each dict; update where appropriate
    for k in oldDict:
        old = oldDict[k]
        new = newDict.get(k, None)
        if old is new or new is None:
            continue
        
        if inspect.isclass(old):
            if debug:
                print("  Updating class %s.%s (0x%x -> 0x%x)" % (module.__name__, k, id(old), id(new)))
            updateClass(old, new, debug)
                    
        elif inspect.isfunction(old):
            depth = updateFunction(old, new, debug)
            if debug:
                extra = ""
                if depth > 0:
                    extra = " (and %d previous versions)" % depth
                print("  Updating function %s.%s%s" % (module.__name__, k, extra))
        elif lists and isinstance(old, list):
            l = old.len()
            old.extend(new)
            for i in range(l):
                old.pop(0)
        elif dicts and isinstance(old, dict):
            old.update(new)
            for k in old:
                if k not in new:
                    del old[k]
        


## For functions:
##  1) update the code and defaults to new versions.
##  2) keep a reference to the previous version so ALL versions get updated for every reload