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- abstract-class-instantiated.md
- abstract-method.md
- access-member-before-definition.md
- anomalous-backslash-in-string.md
- anomalous-unicode-escape-in-string.md
- apply-builtin.md
- arguments-differ.md
- arguments-out-of-order.md
- arguments-renamed.md
- assert-on-string-literal.md
- assert-on-tuple.md
- assign-to-new-keyword.md
- assigning-non-slot.md
- assignment-from-no-return.md
- assignment-from-none.md
- astroid-error.md
- attribute-defined-outside-init.md
- await-outside-async.md
- backtick.md
- bad-builtin.md
- bad-chained-comparison.md
- bad-classmethod-argument.md
- bad-configuration-section.md
- bad-continuation.md
- bad-except-order.md
- bad-exception-cause.md
- bad-exception-context.md
- bad-file-encoding.md
- bad-format-character.md
- bad-format-string-key.md
- bad-format-string.md
- bad-indentation.md
- bad-inline-option.md
- bad-mcs-classmethod-argument.md
- bad-mcs-method-argument.md
- bad-open-mode.md
- bad-option-value.md
- bad-plugin-value.md
- bad-python3-import.md
- bad-reversed-sequence.md
- bad-staticmethod-argument.md
- bad-str-strip-call.md
- bad-string-format-type.md
- bad-super-call.md
- bad-thread-instantiation.md
- bad-whitespace.md
- bare-except.md
- basestring-builtin.md
- bidirectional-unicode.md
- binary-op-exception.md
- blacklisted-name.md
- boolean-datetime.md
- broad-except.md
- broad-exception-caught.md
- broad-exception-raised.md
- buffer-builtin.md
- c-extension-no-member.md
- cache-max-size-none.md
- catching-non-exception.md
- cell-var-from-loop.md
- chained-comparison.md
- class-variable-slots-conflict.md
- cmp-builtin.md
- cmp-method.md
- coerce-builtin.md
- coerce-method.md
- comparison-of-constants.md
- comparison-with-callable.md
- comparison-with-itself.md
- comprehension-escape.md
- condition-evals-to-constant.md
- confusing-with-statement.md
- consider-iterating-dictionary.md
- consider-merging-isinstance.md
- consider-swap-variables.md
- consider-using-any-or-all.md
- consider-using-dict-comprehension.md
- consider-using-dict-items.md
- consider-using-enumerate.md
- consider-using-f-string.md
- consider-using-from-import.md
- consider-using-generator.md
- consider-using-get.md
- consider-using-in.md
- consider-using-join.md
- consider-using-max-builtin.md
- consider-using-min-builtin.md
- consider-using-set-comprehension.md
- consider-using-sys-exit.md
- consider-using-ternary.md
- consider-using-with.md
- contextmanager-generator-missing-cleanup.md
- continue-in-finally.md
- cyclic-import.md
- dangerous-default-value.md
- delslice-method.md
- deprecated-argument.md
- deprecated-class.md
- deprecated-decorator.md
- deprecated-itertools-function.md
- deprecated-lambda.md
- deprecated-method.md
- deprecated-module.md
- deprecated-operator-function.md
- deprecated-pragma.md
- deprecated-str-translate-call.md
- deprecated-string-function.md
- deprecated-sys-function.md
- deprecated-types-field.md
- deprecated-urllib-function.md
- dict-items-not-iterating.md
- dict-iter-method.md
- dict-iter-missing-items.md
- dict-keys-not-iterating.md
- dict-values-not-iterating.md
- dict-view-method.md
- differing-param-doc.md
- differing-type-doc.md
- disallowed-name.md
- div-method.md
- django-not-available.md
- duplicate-argument-name.md
- duplicate-bases.md
- duplicate-code.md
- duplicate-except.md
- duplicate-key.md
- duplicate-string-formatting-argument.md
- duplicate-value.md
- empty-docstring.md
- eq-without-hash.md
- eval-used.md
- exception-escape.md
- exception-message-attribute.md
- exec-used.md
- execfile-builtin.md
- expression-not-assigned.md
- f-string-without-interpolation.md
- fatal.md
- file-builtin.md
- file-ignored.md
- filter-builtin-not-iterating.md
- fixme.md
- forgotten-debug-statement.md
- format-combined-specification.md
- format-needs-mapping.md
- format-string-without-interpolation.md
- function-redefined.md
- getslice-method.md
- global-at-module-level.md
- global-statement.md
- global-variable-not-assigned.md
- global-variable-undefined.md
- hard-coded-auth-user.md
- hex-method.md
- http-response-with-content-type-json.md
- http-response-with-json-dumps.md
- idiv-method.md
- implicit-flag-alias.md
- implicit-str-concat-in-sequence.md
- implicit-str-concat.md
- import-error.md
- import-outside-toplevel.md
- import-self.md
- import-star-module-level.md
- imported-auth-user.md
- inconsistent-mro.md
- inconsistent-quotes.md
- inconsistent-return-statements.md
- indexing-exception.md
- inherit-non-class.md
- init-is-generator.md
- input-builtin.md
- intern-builtin.md
- invalid-all-format.md
- invalid-all-object.md
- invalid-bool-returned.md
- invalid-bytes-returned.md
- invalid-character-backspace.md
- invalid-character-carriage-return.md
- invalid-character-esc.md
- invalid-character-nul.md
- invalid-character-sub.md
- invalid-character-zero-width-space.md
- invalid-characters-in-docstring.md
- invalid-class-object.md
- invalid-encoded-data.md
- invalid-enum-extension.md
- invalid-envvar-default.md
- invalid-envvar-value.md
- invalid-format-index.md
- invalid-format-returned.md
- invalid-getnewargs-ex-returned.md
- invalid-getnewargs-returned.md
- invalid-hash-returned.md
- invalid-index-returned.md
- invalid-length-hint-returned.md
- invalid-length-returned.md
- invalid-metaclass.md
- invalid-name.md
- invalid-overridden-method.md
- invalid-repr-returned.md
- invalid-sequence-index.md
- invalid-slice-index.md
- invalid-slice-step.md
- invalid-slots-object.md
- invalid-slots.md
- invalid-star-assignment-target.md
- invalid-str-codec.md
- invalid-str-returned.md
- invalid-unary-operand-type.md
- invalid-unicode-codec.md
- invalid-unicode-literal.md
- isinstance-second-argument-not-valid-type.md
- keyword-arg-before-vararg.md
- len-as-condition.md
- line-too-long.md
- literal-comparison.md
- locally-disabled.md
- locally-enabled.md
- logging-format-interpolation.md
- logging-format-truncated.md
- logging-fstring-interpolation.md
- logging-not-lazy.md
- logging-too-few-args.md
- logging-too-many-args.md
- logging-unsupported-format.md
- long-builtin.md
- long-suffix.md
- lost-exception.md
- lowercase-l-suffix.md
- lru-cache-decorating-method.md
- map-builtin-not-iterating.md
- messages.txt
- metaclass-assignment.md
- method-cache-max-size-none.md
- method-check-failed.md
- method-hidden.md
- misplaced-bare-raise.md
- misplaced-comparison-constant.md
- misplaced-format-function.md
- misplaced-future.md
- missing-class-docstring.md
- missing-docstring.md
- missing-final-newline.md
- missing-format-argument-key.md
- missing-format-attribute.md
- missing-format-string-key.md
- missing-function-docstring.md
- missing-kwoa.md
- missing-module-docstring.md
- missing-param-doc.md
- missing-parentheses-for-call-in-test.md
- missing-raises-doc.md
- missing-return-doc.md
- missing-return-type-doc.md
- missing-super-argument.md
- missing-timeout.md
- missing-type-doc.md
- missing-yield-doc.md
- missing-yield-type-doc.md
- mixed-format-string.md
- mixed-indentation.md
- mixed-line-endings.md
- model-has-unicode.md
- model-missing-unicode.md
- model-no-explicit-unicode.md
- model-unicode-not-callable.md
- modelform-uses-exclude.md
- modelform-uses-unicode.md
- modified-iterating-dict.md
- modified-iterating-list.md
- modified-iterating-set.md
- multiple-constructor-doc.md
- multiple-imports.md
- multiple-statements.md
- named-expr-without-context.md
- nan-comparison.md
- nested-min-max.md
- new-db-field-with-default.md
- next-method-called.md
- next-method-defined.md
- no-absolute-import.md
- no-classmethod-decorator.md
- no-else-break.md
- no-else-continue.md
- no-else-raise.md
- no-else-return.md
- no-init.md
- no-member.md
- no-method-argument.md
- no-name-in-module.md
- no-self-argument.md
- no-self-use.md
- no-staticmethod-decorator.md
- no-value-for-parameter.md
- non-ascii-bytes-literal.md
- non-ascii-bytes-literals.md
- non-ascii-file-name.md
- non-ascii-module-import.md
- non-ascii-name.md
- non-iterator-returned.md
- non-parent-init-called.md
- non-str-assignment-to-dunder-name.md
- nonexistent-operator.md
- nonlocal-and-global.md
- nonlocal-without-binding.md
- nonstandard-exception.md
- nonzero-method.md
- not-a-mapping.md
- not-an-iterable.md
- not-async-context-manager.md
- not-callable.md
- not-context-manager.md
- not-in-loop.md
- notimplemented-raised.md
- oct-method.md
- old-division.md
- old-ne-operator.md
- old-octal-literal.md
- old-raise-syntax.md
- old-style-class.md
- overlapping-except.md
- overridden-final-method.md
- parameter-unpacking.md
- parse-error.md
- pointless-exception-statement.md
- pointless-statement.md
- pointless-string-statement.md
- positional-only-arguments-expected.md
- possibly-unused-variable.md
- possibly-used-before-assignment.md
- potential-index-error.md
- preferred-module.md
- print-statement.md
- property-on-old-class.md
- property-with-parameters.md
- protected-access.md
- raise-missing-from.md
- raising-bad-type.md
- raising-format-tuple.md
- raising-non-exception.md
- raising-string.md
- range-builtin-not-iterating.md
- raw-checker-failed.md
- raw_input-builtin.md
- rdiv-method.md
- redeclared-assigned-name.md
- redefine-in-handler.md
- redefined-argument-from-local.md
- redefined-builtin.md
- redefined-outer-name.md
- redefined-slots-in-subclass.md
- redefined-variable-type.md
- reduce-builtin.md
- redundant-content-type-for-json-response.md
- redundant-keyword-arg.md
- redundant-returns-doc.md
- redundant-u-string-prefix.md
- redundant-unittest-assert.md
- redundant-yields-doc.md
- reimported.md
- relative-beyond-top-level.md
- relative-import.md
- reload-builtin.md
- repeated-keyword.md
- return-arg-in-generator.md
- return-in-init.md
- return-outside-function.md
- round-builtin.md
- self-assigning-variable.md
- self-cls-assignment.md
- setslice-method.md
- shadowed-import.md
- shallow-copy-environ.md
- signature-differs.md
- simplifiable-condition.md
- simplifiable-if-expression.md
- simplifiable-if-statement.md
- simplify-boolean-expression.md
- single-string-used-for-slots.md
- singledispatch-method.md
- singledispatchmethod-function.md
- singleton-comparison.md
- slots-on-old-class.md
- standarderror-builtin.md
- star-needs-assignment-target.md
- stop-iteration-return.md
- subclassed-final-class.md
- subprocess-popen-preexec-fn.md
- subprocess-run-check.md
- super-init-not-called.md
- super-on-old-class.md
- super-with-arguments.md
- super-without-brackets.md
- superfluous-parens.md
- suppressed-message.md
- syntax-error.md
- sys-max-int.md
- too-few-format-args.md
- too-few-public-methods.md
- too-many-ancestors.md
- too-many-arguments.md
- too-many-boolean-expressions.md
- too-many-branches.md
- too-many-format-args.md
- too-many-function-args.md
- too-many-instance-attributes.md
- too-many-lines.md
- too-many-locals.md
- too-many-nested-blocks.md
- too-many-positional-arguments.md
- too-many-public-methods.md
- too-many-return-statements.md
- too-many-star-expressions.md
- too-many-statements.md
- trailing-comma-tuple.md
- trailing-newlines.md
- trailing-whitespace.md
- truncated-format-string.md
- try-except-raise.md
- typevar-double-variance.md
- typevar-name-incorrect-variance.md
- typevar-name-mismatch.md
- unbalanced-dict-unpacking.md
- unbalanced-tuple-unpacking.md
- undefined-all-variable.md
- undefined-loop-variable.md
- undefined-variable.md
- unexpected-keyword-arg.md
- unexpected-line-ending-format.md
- unexpected-special-method-signature.md
- ungrouped-imports.md
- unhashable-dict-key.md
- unhashable-member.md
- unichr-builtin.md
- unicode-builtin.md
- unidiomatic-typecheck.md
- unknown-option-value.md
- unnecessary-comprehension.md
- unnecessary-dict-index-lookup.md
- unnecessary-direct-lambda-call.md
- unnecessary-dunder-call.md
- unnecessary-ellipsis.md
- unnecessary-lambda-assignment.md
- unnecessary-lambda.md
- unnecessary-list-index-lookup.md
- unnecessary-negation.md
- unnecessary-pass.md
- unnecessary-semicolon.md
- unneeded-not.md
- unpacking-in-except.md
- unpacking-non-sequence.md
- unreachable.md
- unrecognized-inline-option.md
- unrecognized-option.md
- unspecified-encoding.md
- unsubscriptable-object.md
- unsupported-assignment-operation.md
- unsupported-binary-operation.md
- unsupported-delete-operation.md
- unsupported-membership-test.md
- unused-argument.md
- unused-format-string-argument.md
- unused-format-string-key.md
- unused-import.md
- unused-private-member.md
- unused-variable.md
- unused-wildcard-import.md
- use-a-generator.md
- use-dict-literal.md
- use-implicit-booleaness-not-comparison-to-string.md
- use-implicit-booleaness-not-comparison.md
- use-implicit-booleaness-not-len.md
- use-list-literal.md
- use-maxsplit-arg.md
- use-sequence-for-iteration.md
- use-symbolic-message-instead.md
- use-yield-from.md
- used-before-assignment.md
- used-prior-global-declaration.md
- useless-else-on-loop.md
- useless-import-alias.md
- useless-object-inheritance.md
- useless-option-value.md
- useless-param-doc.md
- useless-parent-delegation.md
- useless-return.md
- useless-super-delegation.md
- useless-suppression.md
- useless-type-doc.md
- useless-with-lock.md
- using-cmp-argument.md
- using-constant-test.md
- using-f-string-in-unsupported-version.md
- using-final-decorator-in-unsupported-version.md
- wildcard-import.md
- wrong-exception-operation.md
- wrong-import-order.md
- wrong-import-position.md
- wrong-spelling-in-comment.md
- wrong-spelling-in-docstring.md
- xrange-builtin.md
- xreadlines-attribute.md
- yield-inside-async-function.md
- yield-outside-function.md
- zip-builtin-not-iterating.md
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template.md

unspecified-encoding.md

Pattern: Unspecified encoding

Issue: -

Description

It is better to specify an encoding when opening documents. Using the system default implicitly can create problems on other operating systems.

Further Reading

PEP 597 -- Add optional EncodingWarning