Python ошибка e999 - Не ошибается лишь тот, кто ничего не делает!

As @jonrsharpe says, and I agree, this is because the code is being run in Python 2, but linted in Python 3.

From the flake8 documentation on error codes:

We report E999 when we fail to compile a file into an Abstract Syntax Tree for the plugins that require it.

So to prove this is correct, using a file called bad_syntax.py and using the same print syntax as above:

print "test answer", len([])

When I run this with Python 2, everything is happy:

james@codebox:/tmp/lint$ python --version
Python 2.7.12
james@codebox:/tmp/lint$ python bad_syntax.py
test answer 0

Linting with flake8 invoked with a Python 2 environment also passes.

But when I lint with Python 3 (this is running in a virtualenv venv with Python 3 installed), the E999 is returned:

(venv) james@codebox:/tmp/lint$ flake8 --version
3.5.0 (mccabe: 0.6.1, pycodestyle: 2.3.1, pyflakes: 1.6.0) CPython 3.5.2 on Linux
(venv) james@codebox:/tmp/lint$ flake8 bad_syntax.py
bad_syntax.py:1:19: E999 SyntaxError: invalid syntax

I do not think that this is a setting that needs changing inside linter-flake8 because Flake8 will use the version of Python that it is run through. My guess would be that Flake8 is being run on Python 3 because it has been installed inside a Python 3 environment, even though the code is being run on Python 2.

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So we’re using Flake8 to lint our Python and it’s being run inside of a CI that I believe doesn’t have the version of Python our application is using † and so it errors like so:

2016-10-28 04:19:46.219 running flake8 for lib/python...
2016-10-28 04:19:47.891 /var/lib/jenkins/workspace/mono/lib/python/cap/services/utils.py:50:14: E999 SyntaxError: invalid syntax

Hence we added # flake8: noqa: E999 to resolve the issue as we know it’s not a syntax error

† to explain: we have a mono repo, where each directory is a different service, and our application has moved some of its modules into a ‘shared’ directory so other apps can use that code. The problem there is that we have two CI’s; one CI uses Docker to run our app and its tests/linter etc with the relevant and correct environment √ the other CI doesn’t use Docker and uses Python 2 instead of Python 3 which our app uses and it runs its own integration tests against all the ‘services’ (i.e. directories within our mono repo)

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flake8 testing of https://github.com/3b1b/manim on Python 3.6.3

$ flake8 . —count —select=E901,E999,F821,F822,F823 —show-source —statistics

./active_projects/alt_calc.py:2212:44: E999 SyntaxError: invalid syntax
            for x_min, x_max in (-10, -0.1), (0.1, 10)
                                           ^
./active_projects/eola2/determinant_puzzle.py:104:35: E999 SyntaxError: invalid syntax
                for i, j in (0, 0), (1, 1), (0, 1), (1, 0)
                                  ^
./active_projects/eop/bayes.py:1018:38: E999 SyntaxError: invalid syntax
            for s, num in ("", p_str), ("\text{not }", q_str)
                                     ^
./active_projects/eop/bayes_footnote.py:489:35: E999 SyntaxError: invalid syntax
            for s1, s2 in ("", ""), ("= 0.001", "= 0.999")
                                  ^
./active_projects/eop/chapter1/prob_dist_visuals.py:293:22: E999 SyntaxError: invalid syntax
            TexMobject("{1over 8}").scale(0.5).next_to(brace, DOWN)
                     ^
./old_projects/WindingNumber_G.py:1543:47: E999 SyntaxError: invalid syntax
            for x, fx, color in (x0, fx0, RED), (x1, fx1, GREEN)
                                              ^
./old_projects/bell.py:222:38: E999 SyntaxError: invalid syntax
            for here, x in (here1, 0), (here2, 4)
                                     ^
./old_projects/crypto.py:2319:34: E999 SyntaxError: invalid syntax
            for u1, u2 in (-1, 1), (1, 1), (-1, -1)
                                 ^
./old_projects/efvgt.py:2798:52: E999 SyntaxError: invalid syntax
                for mob, axis in (square, raw_axis), (cube, posed_axis)
                                                   ^
./old_projects/fourier.py:3788:38: E999 SyntaxError: invalid syntax
            for p1, p2 in ("e", "t}"), ("g({}", "t}"), ("\int", "dt")
                                     ^
./old_projects/hanoi.py:2033:39: E999 SyntaxError: invalid syntax
            for d, color in (3, GREEN), (2, RED), (1, BLUE_C)
                                      ^
./old_projects/highD.py:1987:52: E999 SyntaxError: invalid syntax
                for mob in slider.real_estate_ticks, slider.dial
                                                   ^
./old_projects/leibniz.py:3449:31: E999 SyntaxError: invalid syntax
            for i, d in (1, 4), (3, 4), (2, 2)
                              ^
./old_projects/triples.py:1747:31: E999 SyntaxError: invalid syntax
            for u, v in (2, 1), (3, 2), (4, 1)
                              ^
./old_projects/wallis.py:3489:27: E999 SyntaxError: invalid syntax
            for part in pi, pi.dot, pi.title
                          ^
./old_projects/waves.py:1780:41: E999 SyntaxError: invalid syntax
                for ov, A in (h_ov, h_A), (v_ov, v_A)
                                        ^
./old_projects/wcat.py:529:31: E999 SyntaxError: invalid syntax
            for i, j in (0, 2), (1, 3)
                              ^
./old_projects/eoc/chapter1.py:2332:47: E999 SyntaxError: invalid syntax
            for mob, tex in (x_squared, f_tex), (dx, "dx"), (dA, "dA")
                                              ^
./old_projects/eoc/chapter10.py:1792:42: E999 SyntaxError: invalid syntax
            for c, arc in (c2, 0.9*np.pi), (c0, np.pi)
                                         ^
./old_projects/eoc/chapter3.py:2088:28: E999 SyntaxError: invalid syntax
            for s in square, bigger_square
                           ^
./old_projects/eoc/chapter6.py:399:35: E999 SyntaxError: invalid syntax
                for i, j in (1, 0), (0, 1)
                                  ^
./old_projects/eoc/chapter8.py:1922:31: E999 SyntaxError: invalid syntax
            for i, j in (0, 1), (1, 0), (1, 2)
                              ^
./old_projects/eoc/footnote.py:637:49: E999 SyntaxError: invalid syntax
                for mob, tex in (self.ddf, "df"), (self.dx_squared, "dx")
                                                ^
./old_projects/eola/chapter10.py:312:24: E999 SyntaxError: invalid syntax
            for u in -1, 1
                       ^
./old_projects/eola/chapter11.py:508:28: E999 SyntaxError: invalid syntax
                for u in -1, 1
                           ^
./old_projects/eola/chapter2.py:242:43: E999 SyntaxError: invalid syntax
            for v, label in (v1, v1_label), (v2, v2_label)
                                          ^
./old_projects/eola/chapter6.py:382:35: E999 SyntaxError: invalid syntax
                for i, j in (1, 3), (2, 6)
                                  ^
./old_projects/eola/chapter8.py:1162:33: E999 SyntaxError: invalid syntax
            for v1, v2 in (v, w), (v.target, w.target)
                                ^
./utils/iterables.py:113:16: E999 SyntaxError: invalid syntax
        lambda (f1, args1), (f2, args2): (lambda x: f1(f2(x, *args2), *args1)),
               ^
./utils/simple_functions.py:15:28: F821 undefined name 'xrange'
    denom = reduce(op.mul, xrange(1, r + 1), 1)
                           ^
./utils/simple_functions.py:16:28: F821 undefined name 'xrange'
    numer = reduce(op.mul, xrange(n, n - r, -1), 1)
                           ^
29    E999 SyntaxError: invalid syntax
2     F821 undefined name 'xrange'
31

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» Python для новичков
» Ошибка E999

#1 Авг. 16, 2018 17:03:38

Ошибка E999

Добрый день! При написании программы столкнулся с ошибкой E999, все перепробывал, не могу исправить.
По отдельности

  try:
            Number = int('{}'.format(alice_request)
            client = Client('')
            result = client.service.Web(Number)
            except Exception:
                   print('Произошла ошибка')
        else:
             if not result or result =="-3":
                  print('Произошла ошибка')
             else:
                  print(result['return'])

Работает нормально
https://pp.userapi.com/c846217/v846217140/c666d/AsQKXX9Zqog.jpg
В чем может быть проблема?
Python 3.7

Отредактировано megabait1024@mail.ru (Авг. 16, 2018 17:04:13)

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#2 Авг. 17, 2018 00:11:40

Ошибка E999

34 строка не хватает закрывающей скобки.
И как это может работать нормально при ошибке синтаксиса?

_________________________________________________________________________________
полезный блог о python john16blog.blogspot.com

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Пожаловаться

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Flake8 and its plugins assign a code to each message that we refer to as an
error code (or violation). Most plugins will list their error
codes in their documentation or README.

Flake8 installs pycodestyle, pyflakes, and mccabe by default and
generates its own error codes for pyflakes:

Code	Example Message
F401	`module` imported but unused
F402	import `module` from line `N` shadowed by loop variable
F403	‘from `module` import *’ used; unable to detect undefined names
F404	future import(s) `name` after other statements
F405	`name` may be undefined, or defined from star imports: `module`
F406	‘from `module` import *’ only allowed at module level
F407	an undefined `__future__` feature name was imported

F501	invalid `%` format literal
F502	`%` format expected mapping but got sequence
F503	`%` format expected sequence but got mapping
F504	`%` format unused named arguments
F505	`%` format missing named arguments
F506	`%` format mixed positional and named arguments
F507	`%` format mismatch of placeholder and argument count
F508	`%` format with `*` specifier requires a sequence
F509	`%` format with unsupported format character
F521	`.format(...)` invalid format string
F522	`.format(...)` unused named arguments
F523	`.format(...)` unused positional arguments
F524	`.format(...)` missing argument
F525	`.format(...)` mixing automatic and manual numbering
F541	f-string without any placeholders

F601	dictionary key `name` repeated with different values
F602	dictionary key variable `name` repeated with different values
F621	too many expressions in an assignment with star-unpacking
F622	two or more starred expressions in an assignment `(a, b, c = d)`
F631	assertion test is a tuple, which is always `True`
F632	use `==/!=` to compare `str`, `bytes`, and `int` literals
F633	use of `>>` is invalid with `print` function
F634	if test is a tuple, which is always `True`

F701	a `break` statement outside of a `while` or `for` loop
F702	a `continue` statement outside of a `while` or `for` loop
F703	a `continue` statement in a `finally` block in a loop
F704	a `yield` or `yield from` statement outside of a function
F706	a `return` statement outside of a function/method
F707	an `except:` block as not the last exception handler
F721	syntax error in doctest
F722	syntax error in forward annotation
F723	syntax error in type comment

F811	redefinition of unused `name` from line `N`
F821	undefined name `name`
F822	undefined name `name` in `__all__`
F823	local variable `name` … referenced before assignment
F831	duplicate argument `name` in function definition
F841	local variable `name` is assigned to but never used

F901	`raise NotImplemented` should be `raise NotImplementedError`

We also report one extra error: E999. We report E999 when we fail to
compile a file into an Abstract Syntax Tree for the plugins that require it.

mccabe only ever reports one violation — C901 based on the
complexity value provided by the user.

Users should also reference pycodestyle’s list of error codes.

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As @jonrsharpe says, and I agree, this is because the code is being run in Python 2, but linted in Python 3.

From the flake8 documentation on error codes:

We report E999 when we fail to compile a file into an Abstract Syntax Tree for the plugins that require it.

So to prove this is correct, using a file called bad_syntax.py and using the same print syntax as above:

print "test answer", len([])

When I run this with Python 2, everything is happy:

james@codebox:/tmp/lint$ python --version
Python 2.7.12
james@codebox:/tmp/lint$ python bad_syntax.py
test answer 0

Linting with flake8 invoked with a Python 2 environment also passes.

But when I lint with Python 3 (this is running in a virtualenv venv with Python 3 installed), the E999 is returned:

(venv) james@codebox:/tmp/lint$ flake8 --version
3.5.0 (mccabe: 0.6.1, pycodestyle: 2.3.1, pyflakes: 1.6.0) CPython 3.5.2 on Linux
(venv) james@codebox:/tmp/lint$ flake8 bad_syntax.py
bad_syntax.py:1:19: E999 SyntaxError: invalid syntax

Уведомления

Начало
» Python для новичков
» Ошибка E999

#1 Авг. 16, 2018 17:03:38

Ошибка E999

  try:
            Number = int('{}'.format(alice_request)
            client = Client('')
            result = client.service.Web(Number)
            except Exception:
                   print('Произошла ошибка')
        else:
             if not result or result =="-3":
                  print('Произошла ошибка')
             else:
                  print(result['return'])

Работает нормально
https://pp.userapi.com/c846217/v846217140/c666d/AsQKXX9Zqog.jpg
В чем может быть проблема?
Python 3.7

Отредактировано megabait1024@mail.ru (Авг. 16, 2018 17:04:13)

Офлайн

Пожаловаться

#2 Авг. 17, 2018 00:11:40

Ошибка E999

34 строка не хватает закрывающей скобки.
И как это может работать нормально при ошибке синтаксиса?

_________________________________________________________________________________
полезный блог о python john16blog.blogspot.com

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Пожаловаться

flake8 — синтаксическая ошибка E999 с аргументом метакласса python3

Рохит

Я использую vim для разработки на Python с flake8 в качестве линтера. Ниже приведен пример кода, содержащего метакласы. Flake8 показывает ошибку E999 SyntaxError: недопустимый синтаксис (E) в строке class Spam(metaclass=MyMeta). Я использую python3, и это правильный синтаксис для указания пользовательских метаклассов в python3.

class MyMeta(type):

    def __new__(cls, clsname, bases, clsbody):
        upper_case = {}
        for k, v in clsbody.items():
            if not k.startswith('__'):
                upper_case[k.upper()] = v
        return super().__new__(cls, clsname, bases, upper_case)


class Spam(metaclass=MyMeta):
    foo = 'bar'

Есть способ исправить это?

jsbueno

Что ж, вы редактируете код Python3, и ваш flake8, очевидно, проверяет синтаксис Python2.

Глядя в Интернет, можно увидеть, что простой способ заставить flake8 проверять Python3 — это запустить его из Python3.

Скорее всего, вы работаете в Linux или другом Unix (я понял подсказку из использования VIM), поэтому, если flake8 установлен в масштабе всей системы, удалите его и установите в Python3 (в Fedora и Redhatish дистрибутивах это так dnf uninstall python2-flake8 dnf install python3-flake8).

Более правильный подход может заключаться в том, чтобы просто настроить virtualenv для вашего проекта Python с желаемой версией Python, установить flake8 внутри этого virtualenv pip install flake8, а также запустить VIM изнутри вашего virtualenv, чтобы все сценарии или программы Python, которые он запускал, были на та же среда, и даже такие вещи, как расширенное автозаполнение, могут проверять библиотеки, которые фактически использует ваш проект.

Эта статья взята из Интернета, укажите источник при перепечатке.

Если есть какие-либо нарушения, пожалуйста, свяжитесь с[email protected] Удалить.

Отредактировано в2020-11-26

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