Python FunctionType.func_doc方法代码示例

# 需要导入模块: from types import FunctionType [as 别名]
# 或者: from types.FunctionType import func_doc [as 别名]
def buildFunction(baseFunc, code=None, glbls=None,
                  name=None, defaults=None,
                  kwdefaults=None, closure=None,
                  annotations=None, doc=None, dct=None):

    resf = None

    def _f():
        pass

    if hasattr(_f, 'func_code'):
        # Python 2.x
        resf = FunctionType(code or baseFunc.func_code,
                            glbls or baseFunc.func_globals,
                            name or baseFunc.func_name,
                            defaults or baseFunc.func_defaults,
                            closure or baseFunc.func_closure)
        resf.func_dict = dct or baseFunc.func_dict
        resf.func_doc = doc or baseFunc.func_doc

    else:
        # Python 3.x
        resf = FunctionType(code or baseFunc.__code__,
                            glbls or baseFunc.__globals__,
                            name or baseFunc.__name__,
                            defaults or baseFunc.__defaults__,
                            closure or baseFunc.__closure__)
        resf.__kwdefaults__ = kwdefaults or baseFunc.__kwdefaults__
        resf.__annotations__ = annotations or baseFunc.__annotations__
        resf.__dict__ = dct or baseFunc.__dict__
        resf.__doc__ = doc or baseFunc.__doc__

    return resf

# 需要导入模块: from types import FunctionType [as 别名]
# 或者: from types.FunctionType import func_doc [as 别名]
def rebindFunction(f, rebindDir=None,
                   funcName=None, funcDoc=None,
                   argRebindDir=None, propRebindDir=None,
                   **rebinds):
  '''return a function derived from *f* with rebinds specified by *rebindDir* and/or *rebinds*.

  Use *funcName* as function name, instead of `f.func_name` as function
  name, if given.
  
  *argRebindDir* is a dictionary mapping function parameter names
  to defaults. You can use this to turn required parameters into optional
  ones (by providing a default value for them), to change their
  default values or to turn optional parameters into required ones.
  Note that Python requires that required arguments must preceed
  optional ones. A `ValueError` is raised when *argRebindDir* violates
  this restriction.
  Note: we only support simply named parameters (not constructor expressions).

  *propRebindDir* is a dictionary specifying rebinds for the
  functions properties.

  ATT: *f.func_globals* is copied at rebind time. Later modifications
  may affect *f* but not the rebind function.

  Note: we would like to rebind closure parts as well but Python currently
  does not allow to create `cell` instances. Thus, this would be difficult.
  '''
  # unwrap a method
  f = getattr(f, 'im_func', f)
  # handle global variable rebinds
  fg = f.func_globals.copy()
  if rebindDir: fg.update(rebindDir)
  if rebinds: fg.update(rebinds)
  # handle argument (default) rebinds
  if argRebindDir:
    args, _, _, defaults = getargspec(f)
    # ensure all arguments are known
    unknown = []
    for a in argRebindDir:
      if a not in args: unknown.append(a)
    if unknown:
      raise ValueError('unknown arguments in `argRebindDir`: %s'
                       % ', '.join(unknown)
                       )
    # determine new defaults
    defaults = defaults is not None and list(defaults) or []
    defaults = [REQUIRED] * (len(args) - len(defaults)) + defaults
    funcDefaults = []
    for (a,d) in zip(args, defaults):
      if isinstance(a, str) and a in argRebindDir: d = argRebindDir[a]
      if d is not REQUIRED: funcDefaults.append(d)
      elif funcDefaults: raise ValueError('required argument after optional one: %s' % a)
    funcDefaults = tuple(funcDefaults)
  else: funcDefaults = f.func_defaults or ()
  # construct the new function
  nf = FunctionType(
    f.func_code,
    fg, # func_globals
    funcName or f.func_name,
    funcDefaults,
    f.func_closure,
    )
  # handle the documentation
  if funcDoc is not None: nf.func_doc = funcDoc
  else: nf.func_doc = f.func_doc
  # handle is properties
  if f.__dict__ is not None: nf.__dict__ = f.__dict__.copy()
  if propRebindDir:
    if nf.__dict__ is None: nf.__dict__ = {}
    nf.__dict__.update(propRebindDir)
  return nf