Python new.function方法代码示例

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def uniquer(seq, idfun=None):
    if idfun is None:
        def idfun(x): return x
    seen = {}
    result = []
    for item in seq:
        marker = idfun(item)
        # in old Python versions:
        # if seen.has_key(marker)
        # but in new ones:
        if marker in seen: continue
        seen[marker] = 1
        result.append(item)
    return result

# A more efficient implementation of Alex's uniquer(), this avoids the
# idfun() argument and function-call overhead by assuming that all
# items in the sequence are hashable. 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def MD5collect(signatures):
    """
    Collects a list of signatures into an aggregate signature.

    signatures - a list of signatures
    returns - the aggregate signature
    """
    if len(signatures) == 1:
        return signatures[0]
    else:
        return MD5signature(string.join(signatures, ', '))



# Wrap the intern() function so it doesn't throw exceptions if ineligible
# arguments are passed. The intern() function was moved into the sys module in
# Python 3. 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def makeStatBar(width, maxPosition, doneChar = '=', undoneChar = '-', currentChar = '>'):
    """Creates a function that will return a string representing a progress bar.
    """
    aValue = width / float(maxPosition)
    def statBar(position, force = 0, last = ['']):
        assert len(last) == 1, "Don't mess with the last parameter."
        done = int(aValue * position)
        toDo = width - done - 2
        result = "[%s%s%s]" % (doneChar * done, currentChar, undoneChar * toDo)
        if force:
            last[0] = result
            return result
        if result == last[0]:
            return ''
        last[0] = result
        return result

    statBar.__doc__ = """statBar(position, force = 0) -> '[%s%s%s]'-style progress bar

    returned string is %d characters long, and the range goes from 0..%d.
    The 'position' argument is where the '%s' will be drawn.  If force is false,
    '' will be returned instead if the resulting progress bar is identical to the
    previously returned progress bar.
""" % (doneChar * 3, currentChar, undoneChar * 3, width, maxPosition, currentChar)
    return statBar 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def spewer(frame, s, ignored):
    """A trace function for sys.settrace that prints every function or method call."""
    from twisted.python import reflect
    if frame.f_locals.has_key('self'):
        se = frame.f_locals['self']
        if hasattr(se, '__class__'):
            k = reflect.qual(se.__class__)
        else:
            k = reflect.qual(type(se))
        print 'method %s of %s at %s' % (
            frame.f_code.co_name, k, id(se)
        )
    else:
        print 'function %s in %s, line %s' % (
            frame.f_code.co_name,
            frame.f_code.co_filename,
            frame.f_lineno) 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def setIDFunction(idFunction):
    """
    Change the function used by L{unsignedID} to determine the integer id value
    of an object.  This is largely useful for testing to give L{unsignedID}
    deterministic, easily-controlled behavior.

    @param idFunction: A function with the signature of L{id}.
    @return: The previous function being used by L{unsignedID}.
    """
    global _idFunction
    oldIDFunction = _idFunction
    _idFunction = idFunction
    return oldIDFunction


# A value about twice as large as any Python int, to which negative values
# from id() will be added, moving them into a range which should begin just
# above where positive values from id() leave off. 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def save_timeseries(self, obj):
        import scikits.timeseries.tseries as ts

        func, reduce_args, state = obj.__reduce__()
        if func != ts._tsreconstruct:
            raise pickle.PicklingError('timeseries using unexpected reconstruction function %s' % str(func))
        state = (1,
                         obj.shape,
                         obj.dtype,
                         obj.flags.fnc,
                         obj._data.tostring(),
                         ts.getmaskarray(obj).tostring(),
                         obj._fill_value,
                         obj._dates.shape,
                         obj._dates.__array__().tostring(),
                         obj._dates.dtype, #added -- preserve type
                         obj.freq,
                         obj._optinfo,
                         )
        return self.save_reduce(_genTimeSeries, (reduce_args, state)) 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def _modules_to_main(modList):
    """Force every module in modList to be placed into main"""
    if not modList:
        return

    main = sys.modules['__main__']
    for modname in modList:
        if type(modname) is str:
            try:
                mod = __import__(modname)
            except Exception, i: #catch all...
                sys.stderr.write('warning: could not import %s\n.  Your function may unexpectedly error due to this import failing; \
A version mismatch is likely.  Specific error was:\n' % modname)
                print_exec(sys.stderr)
            else:
                setattr(main,mod.__name__, mod)
        else:
            #REVERSE COMPATIBILITY FOR CLOUD CLIENT 1.5 (WITH EPD)
            #In old version actual module was sent
            setattr(main,modname.__name__, modname)

#object generators: 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def _make_skel_func(code, num_closures, base_globals = None):
    """ Creates a skeleton function object that contains just the provided
        code and the correct number of cells in func_closure.  All other
        func attributes (e.g. func_globals) are empty.
    """
    #build closure (cells):
    if not ctypes:
        raise Exception('ctypes failed to import; cannot build function')

    cellnew = ctypes.pythonapi.PyCell_New
    cellnew.restype = ctypes.py_object
    cellnew.argtypes = (ctypes.py_object,)
    dummy_closure = tuple(map(lambda i: cellnew(None), range(num_closures)))

    if base_globals is None:
        base_globals = {}
    base_globals['__builtins__'] = __builtins__

    return types.FunctionType(code, base_globals,
                              None, None, dummy_closure)

# this piece of opaque code is needed below to modify 'cell' contents 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def mergeFunctionMetadata(f, g):
    """
    Overwrite C{g}'s docstring and name with values from C{f}.  Update
    C{g}'s instance dictionary with C{f}'s.
    """
    try:
        g.__doc__ = f.__doc__
    except (TypeError, AttributeError):
        pass
    try:
        g.__dict__.update(f.__dict__)
    except (TypeError, AttributeError):
        pass
    try:
        g.__name__ = f.__name__
    except TypeError:
        try:
            g = new.function(
                g.func_code, g.func_globals,
                f.__name__, inspect.getargspec(g)[-1],
                g.func_closure)
        except TypeError:
            pass
    return g 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def test_java_serialization_pyfunction(self):
        # Not directly supported due to lack of general utility
        # (globals will usually be in the function object in
        # func_globals), and problems with unserialization
        # vulnerabilities. Users can always subclass from PyFunction
        # for specific cases, as seen in PyCascading
        import new
        def f():
            return 6 * 7 + max(0, 1, 2)
        # However, using the new module, it's possible to create a
        # function with no globals, which means the globals will come
        # from the current context
        g = new.function(f.func_code, {}, "g")
        # But still forbid Java deserialization of this function
        # object. Use pickling or other support instead.
        with self.assertRaises(UnsupportedOperationException):
            roundtrip_serialization(g) 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def render_tree(root, child_func, prune=0, margin=[0], visited={}):
    """
    Render a tree of nodes into an ASCII tree view.
    root - the root node of the tree
    child_func - the function called to get the children of a node
    prune - don't visit the same node twice
    margin - the format of the left margin to use for children of root.
       1 results in a pipe, and 0 results in no pipe.
    visited - a dictionary of visited nodes in the current branch if not prune,
       or in the whole tree if prune.
    """

    rname = str(root)

    children = child_func(root)
    retval = ""
    for pipe in margin[:-1]:
        if pipe:
            retval = retval + "| "
        else:
            retval = retval + "  "

    if rname in visited:
        return retval + "+-[" + rname + "]\n"

    retval = retval + "+-" + rname + "\n"
    if not prune:
        visited = copy.copy(visited)
    visited[rname] = 1

    for i in range(len(children)):
        margin.append(i<len(children)-1)
        retval = retval + render_tree(children[i], child_func, prune, margin, visited
)
        margin.pop()

    return retval 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def RegGetValue(root, key):
        """This utility function returns a value in the registry
        without having to open the key first.  Only available on
        Windows platforms with a version of Python that can read the
        registry.  Returns the same thing as
        SCons.Util.RegQueryValueEx, except you just specify the entire
        path to the value, and don't have to bother opening the key
        first.  So:

        Instead of:
          k = SCons.Util.RegOpenKeyEx(SCons.Util.HKEY_LOCAL_MACHINE,
                r'SOFTWARE\Microsoft\Windows\CurrentVersion')
          out = SCons.Util.RegQueryValueEx(k,
                'ProgramFilesDir')

        You can write:
          out = SCons.Util.RegGetValue(SCons.Util.HKEY_LOCAL_MACHINE,
                r'SOFTWARE\Microsoft\Windows\CurrentVersion\ProgramFilesDir')
        """
        # I would use os.path.split here, but it's not a filesystem
        # path...
        p = key.rfind('\\') + 1
        keyp = key[:p-1]          # -1 to omit trailing slash
        val = key[p:]
        k = RegOpenKeyEx(root, keyp)
        return RegQueryValueEx(k,val) 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def make_path_relative(path):
    """ makes an absolute path name to a relative pathname.
    """
    if os.path.isabs(path):
        drive_s,path = os.path.splitdrive(path)

        import re
        if not drive_s:
            path=re.compile("/*(.*)").findall(path)[0]
        else:
            path=path[1:]

    assert( not os.path.isabs( path ) ), path
    return path



# The original idea for AddMethod() and RenameFunction() come from the
# following post to the ActiveState Python Cookbook:
#
#	ASPN: Python Cookbook : Install bound methods in an instance
#	http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/223613
#
# That code was a little fragile, though, so the following changes
# have been wrung on it:
#
# * Switched the installmethod() "object" and "function" arguments,
#   so the order reflects that the left-hand side is the thing being
#   "assigned to" and the right-hand side is the value being assigned.
#
# * Changed explicit type-checking to the "try: klass = object.__class__"
#   block in installmethod() below so that it still works with the
#   old-style classes that SCons uses.
#
# * Replaced the by-hand creation of methods and functions with use of
#   the "new" module, as alluded to in Alex Martelli's response to the
#   following Cookbook post:
#
#	ASPN: Python Cookbook : Dynamically added methods to a class
#	http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81732 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def AddMethod(object, function, name = None):
    """
    Adds either a bound method to an instance or an unbound method to
    a class. If name is ommited the name of the specified function
    is used by default.
    Example:
      a = A()
      def f(self, x, y):
        self.z = x + y
      AddMethod(f, A, "add")
      a.add(2, 4)
      print a.z
      AddMethod(lambda self, i: self.l[i], a, "listIndex")
      print a.listIndex(5)
    """
    import new

    if name is None:
        name = function.__name__
    else:
        function = RenameFunction(function, name)

    try:
        klass = object.__class__
    except AttributeError:
        # "object" is really a class, so it gets an unbound method.
        object.__dict__[name] = new.instancemethod(function, None, object)
    else:
        # "object" is really an instance, so it gets a bound method.
        object.__dict__[name] = new.instancemethod(function, object, klass) 

# 需要导入模块: import new [as 别名]
# 或者: from new import function [as 别名]
def get_commands(self):
        if self._command_list is None:
            hashfilter = {}
            for name in filter(self._command_filt, dir(self)):
                ## this filters out aliases (same function id)
                meth = getattr(self, name)
                hashfilter[id(meth.im_func)] = meth.im_func.func_name
            self._command_list = hashfilter.values()
            self._command_list.sort()
        return self._command_list

    # user visible commands are methods that don't have a leading underscore,
    # and do have a docstring.