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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 _saferepr(obj):
 """Get a safe repr of an object for assertion error messages. The assertion formatting (util.format_explanation()) requires newlines to be escaped since they are a special character for it. Normally assertion.util.format_explanation() does this but for a custom repr it is possible to contain one of the special escape sequences, especially '\n{' and '\n}' are likely to be present in JSON reprs. """

    repr = py.io.saferepr(obj)
    if py.builtin._istext(repr):
        t = py.builtin.text
    else:
        t = py.builtin.bytes
    return repr.replace(t("\n"), t("\\n"))