<h2>Editing File: /usr/lib64/python3.6/email/errors.py</h2><form method='post'><textarea name='content' class='file-edit'># Copyright (C) 2001-2006 Python Software Foundation
# Author: Barry Warsaw
# Contact: email-sig@python.org

&quot;&quot;&quot;email package exception classes.&quot;&quot;&quot;


class MessageError(Exception):
    &quot;&quot;&quot;Base class for errors in the email package.&quot;&quot;&quot;


class MessageParseError(MessageError):
    &quot;&quot;&quot;Base class for message parsing errors.&quot;&quot;&quot;


class HeaderParseError(MessageParseError):
    &quot;&quot;&quot;Error while parsing headers.&quot;&quot;&quot;


class BoundaryError(MessageParseError):
    &quot;&quot;&quot;Couldn't find terminating boundary.&quot;&quot;&quot;


class MultipartConversionError(MessageError, TypeError):
    &quot;&quot;&quot;Conversion to a multipart is prohibited.&quot;&quot;&quot;


class CharsetError(MessageError):
    &quot;&quot;&quot;An illegal charset was given.&quot;&quot;&quot;


class HeaderWriteError(MessageError):
    &quot;&quot;&quot;Error while writing headers.&quot;&quot;&quot;


# These are parsing defects which the parser was able to work around.
class MessageDefect(ValueError):
    &quot;&quot;&quot;Base class for a message defect.&quot;&quot;&quot;

    def __init__(self, line=None):
        if line is not None:
            super().__init__(line)
        self.line = line

class NoBoundaryInMultipartDefect(MessageDefect):
    &quot;&quot;&quot;A message claimed to be a multipart but had no boundary parameter.&quot;&quot;&quot;

class StartBoundaryNotFoundDefect(MessageDefect):
    &quot;&quot;&quot;The claimed start boundary was never found.&quot;&quot;&quot;

class CloseBoundaryNotFoundDefect(MessageDefect):
    &quot;&quot;&quot;A start boundary was found, but not the corresponding close boundary.&quot;&quot;&quot;

class FirstHeaderLineIsContinuationDefect(MessageDefect):
    &quot;&quot;&quot;A message had a continuation line as its first header line.&quot;&quot;&quot;

class MisplacedEnvelopeHeaderDefect(MessageDefect):
    &quot;&quot;&quot;A 'Unix-from' header was found in the middle of a header block.&quot;&quot;&quot;

class MissingHeaderBodySeparatorDefect(MessageDefect):
    &quot;&quot;&quot;Found line with no leading whitespace and no colon before blank line.&quot;&quot;&quot;
# XXX: backward compatibility, just in case (it was never emitted).
MalformedHeaderDefect = MissingHeaderBodySeparatorDefect

class MultipartInvariantViolationDefect(MessageDefect):
    &quot;&quot;&quot;A message claimed to be a multipart but no subparts were found.&quot;&quot;&quot;

class InvalidMultipartContentTransferEncodingDefect(MessageDefect):
    &quot;&quot;&quot;An invalid content transfer encoding was set on the multipart itself.&quot;&quot;&quot;

class UndecodableBytesDefect(MessageDefect):
    &quot;&quot;&quot;Header contained bytes that could not be decoded&quot;&quot;&quot;

class InvalidBase64PaddingDefect(MessageDefect):
    &quot;&quot;&quot;base64 encoded sequence had an incorrect length&quot;&quot;&quot;

class InvalidBase64CharactersDefect(MessageDefect):
    &quot;&quot;&quot;base64 encoded sequence had characters not in base64 alphabet&quot;&quot;&quot;

class InvalidBase64LengthDefect(MessageDefect):
    &quot;&quot;&quot;base64 encoded sequence had invalid length (1 mod 4)&quot;&quot;&quot;

# These errors are specific to header parsing.

class HeaderDefect(MessageDefect):
    &quot;&quot;&quot;Base class for a header defect.&quot;&quot;&quot;

    def __init__(self, *args, **kw):
        super().__init__(*args, **kw)

class InvalidHeaderDefect(HeaderDefect):
    &quot;&quot;&quot;Header is not valid, message gives details.&quot;&quot;&quot;

class HeaderMissingRequiredValue(HeaderDefect):
    &quot;&quot;&quot;A header that must have a value had none&quot;&quot;&quot;

class NonPrintableDefect(HeaderDefect):
    &quot;&quot;&quot;ASCII characters outside the ascii-printable range found&quot;&quot;&quot;

    def __init__(self, non_printables):
        super().__init__(non_printables)
        self.non_printables = non_printables

    def __str__(self):
        return (&quot;the following ASCII non-printables found in header: &quot;
            &quot;{}&quot;.format(self.non_printables))

class ObsoleteHeaderDefect(HeaderDefect):
    &quot;&quot;&quot;Header uses syntax declared obsolete by RFC 5322&quot;&quot;&quot;

class NonASCIILocalPartDefect(HeaderDefect):
    &quot;&quot;&quot;local_part contains non-ASCII characters&quot;&quot;&quot;
    # This defect only occurs during unicode parsing, not when
    # parsing messages decoded from binary.
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