Bug report
Bug description:
From the documentation
max_line_length
The maximum length of any line in the serialized output, not counting the end of line character(s). Default is 78, per RFC 5322. A value of 0 or None indicates that no line wrapping should be done at all.
If I follow this documentation then set_content will fail. If I use the provided email.policy.HTTP, which disables word wrapping, it also fails.
from email import policy
from email.message import EmailMessage
msg = EmailMessage(policy=policy.default.clone(max_line_length=None))
msg["From"] = "noreply@example.com"
msg["To"] = "noreply@example.com"
msg["Subject"] = "Email no wrap fails"
msg.set_content("This line fails")
print(msg)Stack trace:
File "/usr/lib/python3.13/email/message.py", line 1207, in set_content
super().set_content(*args, **kw)
~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/lib/python3.13/email/message.py", line 1137, in set_content
content_manager.set_content(self, *args, **kw)
~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.13/email/contentmanager.py", line 37, in set_content
handler(msg, obj, *args, **kw)
~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.13/email/contentmanager.py", line 187, in set_text_content
cte, payload = _encode_text(string, charset, cte, msg.policy)
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.13/email/contentmanager.py", line 151, in _encode_text
if max((len(x) for x in lines), default=0) <= policy.max_line_length:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: '<=' not supported between instances of 'int' and 'NoneType'
Using max_line_length=0 gives a different error:
File "/usr/lib/python3.13/email/message.py", line 1207, in set_content
super().set_content(*args, **kw)
~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
File "/usr/lib/python3.13/email/message.py", line 1137, in set_content
content_manager.set_content(self, *args, **kw)
~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.13/email/contentmanager.py", line 37, in set_content
handler(msg, obj, *args, **kw)
~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.13/email/contentmanager.py", line 187, in set_text_content
cte, payload = _encode_text(string, charset, cte, msg.policy)
~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.13/email/contentmanager.py", line 159, in _encode_text
sniff_qp = quoprimime.body_encode(sniff.decode('latin-1'),
policy.max_line_length)
File "/usr/lib/python3.13/email/quoprimime.py", line 173, in body_encode
raise ValueError("maxlinelen must be at least 4")
CPython versions tested on:
3.13
Operating systems tested on:
Linux
Linked PRs
Bug report
Bug description:
From the documentation
If I follow this documentation then
set_contentwill fail. If I use the providedemail.policy.HTTP, which disables word wrapping, it also fails.Stack trace:
Using
max_line_length=0gives a different error:CPython versions tested on:
3.13
Operating systems tested on:
Linux
Linked PRs