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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 _check_import(module_names):
 """Import the specified modules and provide status."""

    diagnostics = {}
    for module_name in module_names:
        try:
            __import__(module_name)
            res = 'ok'
        except ImportError as err:
            res = str(err)
        diagnostics[module_name] = res
    return diagnostics