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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _py_code_variables(lines, executable, lparams, tab):
 """Adds the variable code lines for all the parameters in the executable. :arg lparams: a list of the local variable declarations made so far that need to be passed to the executable when it is called. """

    allparams = executable.ordered_parameters
    if type(executable).__name__ == "Function":
        allparams = allparams + [executable]

    for p in allparams:
        _py_code_parameter(lines, p, "invar", lparams, tab)
        if p.direction == "(out)":
            #We need to reverse the order of the indices to match the fortran code
            #generation of the wrapper.
            _py_code_parameter(lines, p, "outvar", lparams, tab)
            _py_code_parameter(lines, p, "indices", lparams, tab)
        else:
            _py_code_parameter(lines, p, "indices", lparams, tab)
            _py_code_parameter(lines, p, "outvar", lparams, tab)