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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 raise_ssl_error(code, nested=None):
 """Raise an SSL error with the given error code"""

    err_string = str(code) + ": " + _ssl_errors[code]
    if nested:
        raise SSLError(code, err_string + str(nested))
    raise SSLError(code, err_string)