code: def apply(f, *args, **kwargs):
      """Apply a function to arguments.
  
      Parameters
      ----------
      f : callable
          The function to call.
      *args, **kwargs
      **kwargs
          Arguments to feed to the callable.
  
      Returns
      -------
      a : any
          The result of ``f(*args, **kwargs)``
  
      Examples
      --------
      >>> from toolz.curried.operator import add, sub
      >>> fs = add(1), sub(1)
      >>> tuple(map(apply, fs, (1, 2)))
      (2, -1)
  
      Class decorator
      >>> instance = apply
      >>> @instance
      ... class obj:
      ...     def f(self):
      ...         return 'f'
      ...
      >>> obj.f()
      'f'
      >>> issubclass(obj, object)
      Traceback (most recent call last):
          ...
      TypeError: issubclass() arg 1 must be a class
      >>> isinstance(obj, type)
      False
  
      See Also
      --------
      unpack_apply
      mapply
      """
      return f(*args, **kwargs)
  
file_path: zipline/zipline/utils/functional.py
imports: from functools import reduce
  from operator import itemgetter
  from pprint import pformat
  from six import viewkeys, iteritems
  from six.moves import map, zip
  from toolz import curry, flip
  from .sentinel import sentinel
label_desc: Use image node_id 1 for calling a global function with example usage: apply(f) and returns: f