実験：関数オーãƒãƒ¼ãƒãƒ¼ãƒ‰ï¼ˆç¶šã） - kb84tkhrã®ãƒ–ãƒã‚°
pythonã¯åž‹ãƒ’ントを無視ã™ã‚‹ã®ã§ã“ã†ãªã‚‹ã—ã‹ãªã„ã‚“ã§ã™ã‘ã© ã©ã†ã—ã¦ã‚‚オーãƒãƒ¼ãƒãƒ¼ãƒ‰ã™ã‚‹ãªã‚‰è‡ªåˆ†ã§åž‹ã‚’判定ã™ã‚‹ ã¦ã„ã†ã‹Unionåž‹ãŒã‚ã‚‹ã£ã¦ã“ã¨ã¯ã‚‚ã¨ã‚‚ã¨ãã†ã„ã†ã‚‚ã®ã£ã¦ã“ã¨ã‹ãª class Point: def __init__(self, x: Union[Tuple[float, float], float] = 0.0, y: float=0.0) -> None: if isinstance(x, tuple): self.x = x[0] self.y = x[1] else: self.x = x self.y = y mypyã¯é€šã£ãŸ å‹•ã‹ã™ $ python3 -i shape.py >>> Point() Point(0.0, 0.0) >>> Point(1.0,2.0) Point(1.0, 2.0) >>> Point((2.0,4.0)) Point(2.
datacalssesã®ã‚¤ãƒ³ã‚¹ã‚¿ãƒ³ã‚¹ã‚’å«ã‚“ã 値をJSONã«ã™ã‚‹ã¨ãã®ãƒ¡ãƒ¢ - podhmo's diary
ã„ã¤ã‚‚ã®ã‚„ã¤ã§ã™ã€‚対応ã—ã¦ã„ãªã„値をjson.dumps()ã«ä¸Žãˆã‚‹ã¨TypeErrorãŒç™ºç”Ÿã™ã‚‹ã‚„ã¤ã§ã™ã€‚ TypeError 例ãˆã°ã“ã†ã„ã†dataclassを定義ã—ã¦ã€‚ from dataclasses import dataclass, asdict @dataclass class Point: x: int y: int json.dumpsã™ã‚‹ã¨TypeError import json p = Point(x=1, y=2) # TypeError: Object of type Point is not JSON serializable print(json.dumps(p)) default ã„ã¤ã‚‚ã©ãŠã‚Šã«defaultを渡ã—ã¦ã‚ã’ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ã¡ã‚‡ã£ã¨ã‚ã‚“ã©ãã•ã„ã§ã™ãŒã€is_dataclassã¨ã„ã†é–¢æ•°ã§èª¿ã¹ã‚‰ã‚Œã‚‹ã®ã§ã©ã†ã«ã‹ãªã‚Šã¾ã™ã€‚ import json
singledispatchã¨json.dumpãŒç›¸æ€§è‰¯ã„ã‹ã‚‚？ - podhmo's diary
jsonã®encodeエラーã«ã¤ã„ã¦ã¯æ˜”ã«æ›¸ã„ãŸã“ã®è¾ºã‚’見ã¦ã‚‚らã†ã¨ã—ã¦ã€‚ pythonã§json出力ã™ã‚‹éš›ã§å¯¾å¿œã—ã¦ã„ãªã„åž‹(e.g. datetime)ã®å€¤ã‚’変æ›ã—ãªãŒã‚‰å‡ºåŠ›ã—ãŸã„ - Qiita 今回ã®ä¸»é¡Œã¯ã€json.dumpsã«æ¸¡ã™defaultã®é–¢æ•°ã¨ã—ã¦functools.singledispatchãŒæœ‰ç”¨ã‹ã‚‚ã¨ã„ã†è©±ã€‚ 使ã„ã‹ãŸ singledispatchを利用ã—ãŸãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ã‚’定義 例ãˆã°ä»¥ä¸‹ã®ã‚ˆã†ãªextjsonモジュールを定義ã—ã¦ã‚ã’る。 extjson.py import json from functools import ( singledispatch, partial, ) @singledispatch def encode(o): raise TypeError("Object of type '%s' is not JSON serializable"
Python 3.4.0 ã®æ–°æ©Ÿèƒ½ (3) -　Single-dispatch generic functions - Qiita
今日㯠Single-dispatch generic functions (PEP-443)。Generic functionã¯æ±Žç”¨é–¢æ•°ã¨è¨³ã•ã‚Œã‚‹ã“ã¨ã‚‚多ã„ãŒã€è¨€èªžã«ã‚ˆã£ã¦å¾®å¦™ã«é•ã†ä½¿ã‚れ方をã—ã¦ã„る。Pythonã§ã¯ã€Œå¼•æ•°ã®åž‹ã«ã‚ˆã£ã¦å‹•ä½œãŒç•°ãªã‚‹è¤‡æ•°ã®é–¢æ•°ã«åŒã˜åå‰ã‚’ã¤ã‘ã‚‹ã€ã¨ã„ã†æ„味åˆã„ã§ä½¿ã‚ã‚Œã¦ã„るよã†ã 。 ã¨æ›¸ã„ã¦ã‚‚ã•ã£ã±ã‚Šã‚ã‹ã‚‰ãªã„ã®ã§ã€ä¾‹ç¤ºã€‚引数ã®åž‹ã«ã‚ˆã£ã¦å‡ºåŠ›ãŒç•°ãªã‚‹é–¢æ•°ã‚’考ãˆã‚‹ã€‚Generic functionsを使ã‚ãªã„ã¨ã“ã‚“ãªæ„Ÿã˜ã€‚ def print_func(arg): arg_type = type(arg) if arg_type is int: print("found integer:", arg) elif arg_type is list: print("found list:", arg) else: print("found something:"
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Python ã®ã‚¸ã‚§ãƒãƒªã‚¯ã‚¹ -
Python generics and subclasses
GitHub - davidfritzsche/pytest-mypy-testing: pytest plugin to test mypy static type analysis
Testing mypy stubs, plugins, and types
Python3.4ã®Single-dispatchã§éŠã‚“ã§ã¿ãŸ - Python Advent Calendar 2013 — hirokiky's blog
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