For lines that are too long (e.g. > 79 characters), you can use parentheses to group your conditions:
if (first_index < 0
or second_index > self._number_of_plates - 1
or condition2
and candition3):
raise ValueError
Note that any boolean conditions (or, and) should go at the start of the line before the condition.
In your case, there is a special rule because of the if (...) construct:
When the conditional part of an if-statement is long enough to require
that it be written across multiple lines, it’s worth noting that the
combination of a two character keyword (i.e. if), plus a single space,
plus an opening parenthesis creates a natural 4-space indent for the
subsequent lines of the multiline conditional. This can produce a
visual conflict with the indented suite of code nested inside the
if-statement, which would also naturally be indented to 4 spaces. This
PEP takes no explicit position on how (or whether) to further visually
distinguish such conditional lines from the nested suite inside the
if-statement. Acceptable options in this situation include, but are
not limited to:
# No extra indentation.
if (this_is_one_thing and
that_is_another_thing):
do_something()
# Add a comment, which will provide some distinction in editors
# supporting syntax highlighting.
if (this_is_one_thing and
that_is_another_thing):
# Since both conditions are true, we can frobnicate.
do_something()
# Add some extra indentation on the conditional continuation line.
if (this_is_one_thing
and that_is_another_thing):
do_something()
(Also see the discussion of whether to break before or after binary
operators below.)
Source: PEP 8 Style Guide
elpy (or rather flake8 I suppose) complains about a line over-indented on the line 52 (see below image)
I tried to change this line’s begin but no change.
I always use TAB to have the correct indentation (and this position is where TAB leads).
Here’s my elpy config:
Emacs.............: 26.3
Elpy..............: 1.33.0
Virtualenv........: None
Interactive Python: python3 3.8.3 (/usr/bin/python3)
RPC virtualenv....: rpc-venv (/home/david/.emacs.d/elpy/rpc-venv)
Python...........: /usr/bin/python3 3.8.3 (/usr/bin/python3)
Jedi.............: 0.17.0
Rope.............: 0.17.0
Autopep8.........: 1.5.2
Yapf.............: 0.30.0
Black............: 19.10b0
Syntax checker....: flake8 (/home/david/.local/bin/flake8)
asked May 22, 2020 at 13:49
You should create in your home folder a .flake8rc file, and add some content to ignore that error — documented here and below is a small template:
[flake8]
# it's not a bug that we aren't using all of hacking
ignore =
# F812: list comprehension redefines ...
F812,
# H101: Use TODO(NAME)
H101,
# H202: assertRaises Exception too broad
H202,
# E127: continuation line over-indented for visual indent
E127
The full error code listing is here
answered May 24, 2020 at 6:53
IanIan
1,2469 silver badges10 bronze badges
1
how do you understand the E127:continuation line over-indented for visual indent in the PEP8 that pops up when editing with sublime?
code style problem.
python.org/dev/peps/pep-0008/» rel=» nofollow noreferrer «> PEP8 points out:
Continuation lines should align wrapped elements either vertically using Python’s implicit line joining inside parentheses, brackets and braces, or using a hanging indent [7]. When using a hanging indent the following should be considered; there should be no arguments on the first line and further indentation should be used to clearly distinguish itself as a continuation line.
that is to say, when there are a lot of parameters in parentheses, in order to satisfy that each line contains no more than 79 characters, you need to wrap the parameters. At this time, the parameters of the new line should be aligned with the parentheses of the previous line.
or all the parameters should be wrapped. At this time, the first line cannot have parameters, that is, the last character of the first line must be (, which needs to be indented after the line break. Similar rules are also used on [] , {} .
example:
-sharp Aligned with opening delimiter.
foo = long_function_name(var_one, var_two,
var_three, var_four)
-sharp Hanging indents should add a level.
foo = long_function_name(
var_one, var_two,
var_three, var_four)-
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Просто открыл файл с помощью Sublime Text (с помощью Sublime Linter) и заметил ошибку форматирования PEP8, которую я никогда раньше не видел. Вот текст:
urlpatterns = patterns('',
url(r'^$', listing, name='investment-listing'),
)Он помечает второй аргумент, строку, которая начинается url(...)
Я собирался отключить эту проверку в ST2, но я хотел бы знать, что я делаю неправильно, прежде чем я проигнорирую это. Вы никогда не знаете, если это кажется важным, я мог бы даже изменить свои пути 
Ответы:
PEP-8 рекомендует использовать отступы для открывающих скобок, если вы помещаете что-либо в первую строку, поэтому он должен иметь отступ для открывающей скобки:
urlpatterns = patterns('',
url(r'^$', listing, name='investment-listing'))или не ставить какие-либо аргументы в стартовой строке, а затем делать отступы до единого уровня:
urlpatterns = patterns(
'',
url(r'^$', listing, name='investment-listing'),
)
urlpatterns = patterns(
'', url(r'^$', listing, name='investment-listing'))Я предлагаю прочитать PEP-8 — вы можете пролистать многие из них, и это довольно легко понять, в отличие от некоторых более технических PEP.
Это также относится к таким утверждениям (автоматически отформатированным PyCharm):
return combine_sample_generators(sample_generators['train']),
combine_sample_generators(sample_generators['dev']),
combine_sample_generators(sample_generators['test'])Который даст такое же стиль-предупреждение. Чтобы избавиться от него, мне пришлось переписать его так:
return
combine_sample_generators(sample_generators['train']),
combine_sample_generators(sample_generators['dev']),
combine_sample_generators(sample_generators['test'])