PEP8項目まとめ その2(Whitespace in Expressions and Statements)
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Whitespace in Expressions and Statements
Pet Peeves
Avoid extraneous whitespace in the following situations:
| PEP8 Item | pep8 ErrorCode |
| Immediately inside parentheses, brackets or braces. | E201, E202 |
| Immediately before a comma, semicolon, or colon. | E203, |
| Immediately before the open parenthesis that starts the argument list of a function call | E211 |
| Immediately before the open parenthesis that starts an indexing or slicing | E211(違うかも) |
| More than one space around an assignment (or other) operator to align it with another. | E221, E222 |
| -- | E223(tab before operator), E224(tab after operator) |
| -- | E231(missing whitespace after ","), E241(multiple spaces after ",": デフォルトでチェック無効), E242(tab after ",": デフォルトでチェック無効) |
Other Recommendations
| PEP8 Item | pep8 ErrorCode |
| Always surround these binary operators with a single space on either side: assignment (=), augmented assignment (+=, -= etc.), comparisons (==, <, >, !=, <>, <=, >=, in, not in, is, is not), Booleans (and, or, not). | E225 |
| If operators with different priorities are used, consider adding whitespace around the operators with the lowest priority(ies). Use your own judgement; however, never use more than one space, and always have the same amount of whitespace on both sides of a binary operator. | E221, E222, E226(missing whitespace around arithmetic operator: デフォルトでチェック無効), E227, E228 |
| -- | E223(tab before operator), E224(tab after operator) |
| Don't use spaces around the = sign when used to indicate a keyword argument or a default parameter value. | E251 |
| -- | E271, E272, E273, E274 |
| Compound statements (multiple statements on the same line) are generally discouraged. | -- |
| While sometimes it's okay to put an if/for/while with a small body on the same line, never do this for multi-clause statements. Also avoid folding such long lines! | -- |
サンプルコードでpep8モジュールの動作を確認しないとこの対応で正しいのか不明なので、後日検証する。
