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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 _mof_escaped(strvalue):
 # Note: This is a raw docstring because it shows many backslashes, and # that avoids having to double them. r""" Return a MOF-escaped string from the input string. Parameters: strvalue (:term:`unicode string`):
 The string value. Must not be `None`. Special characters must not be backslash-escaped. Details on backslash-escaping: `DSP0004` defines that the character repertoire for MOF string constants is the entire repertoire for the CIM string datatype. That is, the entire Unicode character repertoire except for U+0000. The only character for which `DSP0004` requires the use of a MOF escape sequence in a MOF string constant, is the double quote (because a MOF string constant is enclosed in double quotes). `DSP0004` defines MOF escape sequences for several more characters, but it does not require their use in MOF. For example, it is valid for a MOF string constant to contain the (unescaped) characters U+000D (newline) or U+0009 (horizontal tab), and others. Processing the MOF escape sequences as unescaped characters may not be supported by MOF-related tools, and therefore this function plays it safe and uses the MOF escape sequences defined in `DSP0004` as much as possible. The following table shows the MOF escape sequences defined in `DSP0004` and whether they are used (i.e. generated) by this function: ========== ==== =========================================================== MOF escape Used Character sequence ========== ==== =========================================================== \b yes U+0008: Backspace \t yes U+0009: Horizontal tab \n yes U+000A: Line feed \f yes U+000C: Form feed \r yes U+000D: Carriage return \" yes U+0022: Double quote (") (required to be used) \' yes U+0027: Single quote (') \\ yes U+005C: Backslash (\) \x<hex> (1) U+<hex>: Any UCS-2 character, where <hex> is one to four hex digits, representing its UCS code position (this form is limited to the UCS-2 character repertoire) \X<hex> no U+<hex>: Any UCS-2 character, where <hex> is one to four hex digits, representing its UCS code position (this form is limited to the UCS-2 character repertoire) ========== ==== =========================================================== (1) Yes, for all other characters in the so called "control range" U+0001..U+001F. """


    escaped_str = strvalue

    # Escape backslash (\)
    escaped_str = escaped_str.replace('\\', '\\\\')

    # Escape \b, \t, \n, \f, \r
    # Note, the Python escape sequences happen to be the same as in MOF
    escaped_str = escaped_str.\
        replace('\b', '\\b').\
        replace('\t', '\\t').\
        replace('\n', '\\n').\
        replace('\f', '\\f').\
        replace('\r', '\\r')

    # Escape remaining control characters (U+0001...U+001F), skipping
    # U+0008, U+0009, U+000A, U+000C, U+000D that are already handled.
    # We hard code it to be faster, plus we can easily skip already handled
    # chars.
    # The generic code would be (not skipping already handled chars):
    #     for cp in range(1, 32):
    #         c = six.unichr(cp)
    #         esc = '\\x{0:04X}'.format(cp)
    #         escaped_str = escaped_str.replace(c, esc)
    escaped_str = escaped_str.\
        replace(u'\u0001', '\\x0001').\
        replace(u'\u0002', '\\x0002').\
        replace(u'\u0003', '\\x0003').\
        replace(u'\u0004', '\\x0004').\
        replace(u'\u0005', '\\x0005').\
        replace(u'\u0006', '\\x0006').\
        replace(u'\u0007', '\\x0007').\
        replace(u'\u000B', '\\x000B').\
        replace(u'\u000E', '\\x000E').\
        replace(u'\u000F', '\\x000F').\
        replace(u'\u0010', '\\x0010').\
        replace(u'\u0011', '\\x0011').\
        replace(u'\u0012', '\\x0012').\
        replace(u'\u0013', '\\x0013').\
        replace(u'\u0014', '\\x0014').\
        replace(u'\u0015', '\\x0015').\
        replace(u'\u0016', '\\x0016').\
        replace(u'\u0017', '\\x0017').\
        replace(u'\u0018', '\\x0018').\
        replace(u'\u0019', '\\x0019').\
        replace(u'\u001A', '\\x001A').\
        replace(u'\u001B', '\\x001B').\
        replace(u'\u001C', '\\x001C').\
        replace(u'\u001D', '\\x001D').\
        replace(u'\u001E', '\\x001E').\
        replace(u'\u001F', '\\x001F')

    # Escape single and double quote
    escaped_str = escaped_str.replace('"', '\\"')
    escaped_str = escaped_str.replace("'", "\\'")

    return escaped_str