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Diffstat (limited to 'Lib/pydoc_data/topics.py')
| -rw-r--r-- | Lib/pydoc_data/topics.py | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/Lib/pydoc_data/topics.py b/Lib/pydoc_data/topics.py index 4643df8..97bb4eb 100644 --- a/Lib/pydoc_data/topics.py +++ b/Lib/pydoc_data/topics.py @@ -416,6 +416,34 @@ topics = {'assert': 'The "assert" statement\n' 'some expressions (like un-parenthesized tuple expressions) ' 'caused a\n' 'syntax error.\n', + 'assignment-expressions': 'Assignment expressions\n' + '**********************\n' + '\n' + 'An assignment expression (sometimes also called a “named expression”' + '\nor “walrus”) assigns an expression to an identifier, while also\n' + 'returning the value of the expression.\n' + '\n' + 'One common use case is when handling matched regular expressions:\n' + '\n' + ' if matching := pattern.search(data):\n' + ' do_something(matching)\n' + '\n' + 'Or, when processing a file stream in chunks:\n' + '\n' + ' while chunk := file.read(9000):\n' + ' process(chunk)\n' + '\n' + 'Assignment expressions must be surrounded by parentheses when used as\n' + 'expression statements and when used as sub-expressions in slicing,\n' + 'conditional, lambda, keyword-argument, and comprehension-if\n' + 'expressions and in assert, with, and assignment statements. In all\n' + 'other places where they can be used, parentheses are not required,\n' + 'including in if and while statements.\n' + '\n' + 'Added in version 3.8.\n' + 'See also:\n' + '\n' + ' **PEP 572** - Assignment Expressions\n', 'async': 'Coroutines\n' '**********\n' '\n' |