def __init__(self, func, data_flow_kernel=None, walltime=<NUM_LIT>, executors='<STR_LIT:all>', cache=False):
self.__name__ = func.__name__<EOL>self.func = func<EOL>self.data_flow_kernel = data_flow_kernel<EOL>self.status = '<STR_LIT>'<EOL>self.executors = executors<EOL>self.cache = cache<EOL>if not (isinstance(executors, list) or isinstance(executors, str)):<EOL><INDENT>logger.error("<STR_LIT>".format(<EOL>func.__name__))<EOL><DEDENT>if cache is True:<EOL><INDENT>try:<EOL><INDENT>self.fn_source = getsource(func)<EOL><DEDENT>except OSError:<EOL><INDENT>logger.debug("<STR_LIT>")<EOL>self.fn_source = func.__name__<EOL><DEDENT>self.func_hash = md5(self.fn_source.encode('<STR_LIT:utf-8>')).hexdigest()<EOL><DEDENT>else:<EOL><INDENT>self.func_hash = func.__name__<EOL><DEDENT>params = signature(func).parameters<EOL>self.kwargs = {}<EOL>if '<STR_LIT>' in params:<EOL><INDENT>self.kwargs['<STR_LIT>'] = params['<STR_LIT>'].default<EOL><DEDENT>if '<STR_LIT>' in params:<EOL><INDENT>self.kwargs['<STR_LIT>'] = params['<STR_LIT>'].default<EOL><DEDENT>self.outputs = params['<STR_LIT>'].default if '<STR_LIT>' in params else []<EOL>self.inputs = params['<STR_LIT>'].default if '<STR_LIT>' in params else []<EOL>
Construct the App object.

        Args:
             - func (function): Takes the function to be made into an App

        Kwargs:
             - data_flow_kernel (DataFlowKernel): The :class:`~parsl.dataflow.dflow.DataFlowKernel` responsible for
               managing this app. This can be omitted only
               after calling :meth:`parsl.dataflow.dflow.DataFlowKernelLoader.load`.
             - walltime (int) : Walltime in seconds for the app execution.
             - executors (str|list) : Labels of the executors that this app can execute over. Default is 'all'.
             - cache (Bool) : Enable caching of this app ?

        Returns:
             - App object.