From 2e0c32ddcdccc939cc504c67e866cb062393a67f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jure=20=C5=A0orn?= Date: Sun, 12 Mar 2023 05:41:19 +0100 Subject: [PATCH] Duck types --- README.md | 4 +++- index.html | 4 +++- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/README.md b/README.md index 11f9ea3..b76f881 100644 --- a/README.md +++ b/README.md @@ -1132,6 +1132,7 @@ class MyHashable: * **With 'total_ordering' decorator, you only need to provide eq() and one of lt(), gt(), le() or ge() special methods and the rest will be automatically generated.** * **Functions sorted() and min() only require lt() method, while max() only requires gt(). However, it is best to define them all so that confusion doesn't arise in other contexts.** * **When two lists, strings or dataclasses are compared, their values get compared in order until a pair of unequal values is found. The comparison of this two values is then returned. The shorter sequence is considered smaller in case of all values being equal.** +* **Characters are compared by their Unicode IDs. Use module 'locale' for proper alphabetical order.** ```python from functools import total_ordering @@ -1196,10 +1197,11 @@ class Counter: ``` ### Context Manager +* **With statements only work with objects that have enter() and exit() special methods.** * **Enter() should lock the resources and optionally return an object.** * **Exit() should release the resources.** * **Any exception that happens inside the with block is passed to the exit() method.** -* **If it wishes to suppress the exception it must return a true value.** +* **The exit() method can suppress the exception by returning a true value.** ```python class MyOpen: def __init__(self, filename): diff --git a/index.html b/index.html index 47da4bc..e3d140d 100644 --- a/index.html +++ b/index.html @@ -961,6 +961,7 @@ Z = dataclasses.make_dataclass('Z', [With 'total_ordering' decorator, you only need to provide eq() and one of lt(), gt(), le() or ge() special methods and the rest will be automatically generated.
  • Functions sorted() and min() only require lt() method, while max() only requires gt(). However, it is best to define them all so that confusion doesn't arise in other contexts.
  • When two lists, strings or dataclasses are compared, their values get compared in order until a pair of unequal values is found. The comparison of this two values is then returned. The shorter sequence is considered smaller in case of all values being equal.
    • +
  • Characters are compared by their Unicode IDs. Use module 'locale' for proper alphabetical order.
    • from functools import total_ordering
 
 @total_ordering
@@ -1021,10 +1022,11 @@ Z = dataclasses.make_dataclass('Z', [1, 2, 3)

    Context Manager

      +
    • With statements only work with objects that have enter() and exit() special methods.
    • Enter() should lock the resources and optionally return an object.
    • Exit() should release the resources.
    • Any exception that happens inside the with block is passed to the exit() method.
      • -
    • If it wishes to suppress the exception it must return a true value.
      • +
    • The exit() method can suppress the exception by returning a true value.
    class MyOpen:
     def __init__(self, filename):
         self.filename = filename