Python 3.9.0a6
diff --git a/Lib/pydoc_data/topics.py b/Lib/pydoc_data/topics.py
index 11b48fd..8aca5c0 100644
--- a/Lib/pydoc_data/topics.py
+++ b/Lib/pydoc_data/topics.py
@@ -1,5 +1,5 @@
# -*- coding: utf-8 -*-
-# Autogenerated by Sphinx on Mon Mar 23 17:18:04 2020
+# Autogenerated by Sphinx on Mon Apr 27 22:35:16 2020
topics = {'assert': 'The "assert" statement\n'
'**********************\n'
'\n'
@@ -1877,9 +1877,9 @@
' value is false. A counter-intuitive implication is that '
'not-a-number\n'
' values are not equal to themselves. For example, if "x =\n'
- ' float(\'NaN\')", "3 < x", "x < 3", "x == x", "x != x" are '
- 'all false.\n'
- ' This behavior is compliant with IEEE 754.\n'
+ ' float(\'NaN\')", "3 < x", "x < 3" and "x == x" are all '
+ 'false, while "x\n'
+ ' != x" is true. This behavior is compliant with IEEE 754.\n'
'\n'
'* "None" and "NotImplemented" are singletons. **PEP 8** '
'advises\n'
@@ -3150,7 +3150,7 @@
'\n'
'When a description of an arithmetic operator below uses the '
'phrase\n'
- '“the numeric arguments are converted to a common type,” this '
+ '“the numeric arguments are converted to a common type”, this '
'means\n'
'that the operator implementation for built-in types works as '
'follows:\n'
@@ -3414,7 +3414,7 @@
'\n'
' Changed in version 3.7: "object.__format__(x, \'\')" is '
'now\n'
- ' equivalent to "str(x)" rather than "format(str(self), '
+ ' equivalent to "str(x)" rather than "format(str(x), '
'\'\')".\n'
'\n'
'object.__lt__(self, other)\n'
@@ -5962,19 +5962,18 @@
'convention.\n'
'\n'
'"__*__"\n'
- ' System-defined names. These names are defined by the '
- 'interpreter\n'
- ' and its implementation (including the standard library). '
- 'Current\n'
- ' system names are discussed in the Special method names '
- 'section and\n'
- ' elsewhere. More will likely be defined in future versions '
- 'of\n'
- ' Python. *Any* use of "__*__" names, in any context, that '
- 'does not\n'
- ' follow explicitly documented use, is subject to breakage '
- 'without\n'
- ' warning.\n'
+ ' System-defined names, informally known as “dunder” names. '
+ 'These\n'
+ ' names are defined by the interpreter and its '
+ 'implementation\n'
+ ' (including the standard library). Current system names are\n'
+ ' discussed in the Special method names section and '
+ 'elsewhere. More\n'
+ ' will likely be defined in future versions of Python. *Any* '
+ 'use of\n'
+ ' "__*__" names, in any context, that does not follow '
+ 'explicitly\n'
+ ' documented use, is subject to breakage without warning.\n'
'\n'
'"__*"\n'
' Class-private names. Names in this category, when used '
@@ -6110,19 +6109,19 @@
'convention.\n'
'\n'
'"__*__"\n'
- ' System-defined names. These names are defined by the '
- 'interpreter\n'
- ' and its implementation (including the standard library). '
- 'Current\n'
- ' system names are discussed in the Special method names '
- 'section and\n'
- ' elsewhere. More will likely be defined in future versions '
- 'of\n'
- ' Python. *Any* use of "__*__" names, in any context, that '
- 'does not\n'
- ' follow explicitly documented use, is subject to breakage '
- 'without\n'
- ' warning.\n'
+ ' System-defined names, informally known as “dunder” names. '
+ 'These\n'
+ ' names are defined by the interpreter and its '
+ 'implementation\n'
+ ' (including the standard library). Current system names '
+ 'are\n'
+ ' discussed in the Special method names section and '
+ 'elsewhere. More\n'
+ ' will likely be defined in future versions of Python. '
+ '*Any* use of\n'
+ ' "__*__" names, in any context, that does not follow '
+ 'explicitly\n'
+ ' documented use, is subject to breakage without warning.\n'
'\n'
'"__*"\n'
' Class-private names. Names in this category, when used '
@@ -7007,7 +7006,7 @@
'program is represented by objects or by relations between '
'objects. (In\n'
'a sense, and in conformance to Von Neumann’s model of a “stored\n'
- 'program computer,” code is also represented by objects.)\n'
+ 'program computer”, code is also represented by objects.)\n'
'\n'
'Every object has an identity, a type and a value. An object’s\n'
'*identity* never changes once it has been created; you may think '
@@ -8168,7 +8167,7 @@
'\n'
' Changed in version 3.7: "object.__format__(x, \'\')" is '
'now\n'
- ' equivalent to "str(x)" rather than "format(str(self), '
+ ' equivalent to "str(x)" rather than "format(str(x), '
'\'\')".\n'
'\n'
'object.__lt__(self, other)\n'
@@ -9915,6 +9914,35 @@
'*start* and\n'
' *end* are interpreted as in slice notation.\n'
'\n'
+ 'str.removeprefix(prefix, /)\n'
+ '\n'
+ ' If the string starts with the *prefix* string, return\n'
+ ' "string[len(prefix):]". Otherwise, return a copy of the '
+ 'original\n'
+ ' string:\n'
+ '\n'
+ " >>> 'TestHook'.removeprefix('Test')\n"
+ " 'Hook'\n"
+ " >>> 'BaseTestCase'.removeprefix('Test')\n"
+ " 'BaseTestCase'\n"
+ '\n'
+ ' New in version 3.9.\n'
+ '\n'
+ 'str.removesuffix(suffix, /)\n'
+ '\n'
+ ' If the string ends with the *suffix* string and that '
+ '*suffix* is\n'
+ ' not empty, return "string[:-len(suffix)]". Otherwise, '
+ 'return a copy\n'
+ ' of the original string:\n'
+ '\n'
+ " >>> 'MiscTests'.removesuffix('Tests')\n"
+ " 'Misc'\n"
+ " >>> 'TmpDirMixin'.removesuffix('Tests')\n"
+ " 'TmpDirMixin'\n"
+ '\n'
+ ' New in version 3.9.\n'
+ '\n'
'str.encode(encoding="utf-8", errors="strict")\n'
'\n'
' Return an encoded version of the string as a bytes '
@@ -10297,6 +10325,16 @@
" >>> 'www.example.com'.lstrip('cmowz.')\n"
" 'example.com'\n"
'\n'
+ ' See "str.removeprefix()" for a method that will remove '
+ 'a single\n'
+ ' prefix string rather than all of a set of characters. '
+ 'For example:\n'
+ '\n'
+ " >>> 'Arthur: three!'.lstrip('Arthur: ')\n"
+ " 'ee!'\n"
+ " >>> 'Arthur: three!'.removeprefix('Arthur: ')\n"
+ " 'three!'\n"
+ '\n'
'static str.maketrans(x[, y[, z]])\n'
'\n'
' This static method returns a translation table usable '
@@ -10410,6 +10448,16 @@
" >>> 'mississippi'.rstrip('ipz')\n"
" 'mississ'\n"
'\n'
+ ' See "str.removesuffix()" for a method that will remove '
+ 'a single\n'
+ ' suffix string rather than all of a set of characters. '
+ 'For example:\n'
+ '\n'
+ " >>> 'Monty Python'.rstrip(' Python')\n"
+ " 'M'\n"
+ " >>> 'Monty Python'.removesuffix(' Python')\n"
+ " 'Monty'\n"
+ '\n'
'str.split(sep=None, maxsplit=-1)\n'
'\n'
' Return a list of the words in the string, using *sep* '
@@ -11483,6 +11531,16 @@
' then they can be used interchangeably to index the same\n'
' dictionary entry.\n'
'\n'
+ ' Dictionaries preserve insertion order, meaning that keys will '
+ 'be\n'
+ ' produced in the same order they were added sequentially over '
+ 'the\n'
+ ' dictionary. Replacing an existing key does not change the '
+ 'order,\n'
+ ' however removing a key and re-inserting it will add it to '
+ 'the\n'
+ ' end instead of keeping its old place.\n'
+ '\n'
' Dictionaries are mutable; they can be created by the "{...}"\n'
' notation (see section Dictionary displays).\n'
'\n'
@@ -11491,6 +11549,13 @@
'"collections"\n'
' module.\n'
'\n'
+ ' Changed in version 3.7: Dictionaries did not preserve '
+ 'insertion\n'
+ ' order in versions of Python before 3.6. In CPython 3.6,\n'
+ ' insertion order was preserved, but it was considered an\n'
+ ' implementation detail at that time rather than a language\n'
+ ' guarantee.\n'
+ '\n'
'Callable types\n'
' These are the types to which the function call operation (see\n'
' section Calls) can be applied:\n'