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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 _get_var_from_string(item):
 """ Get resource variable. """

    modname, varname = _split_mod_var_names(item)
    if modname:
        mod = __import__(modname, globals(), locals(), [varname], -1)
        return getattr(mod, varname)
    else:
        return globals()[varname]