└── README.md


/README.md:
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 1 | # python-version-cheat-sheet
 2 | about the what and when of new python features
 3 | 
 4 | ## overview
 5 | 
 6 | ### python 3.0
 7 | - introduction of **extended iterable unpacking** which enables e.g. `a, *b, c = [1, 2, 3, 4, 5]` so `b` becomes `[2, 3, 4]`
 8 | ([PEP 3132](https://www.python.org/dev/peps/pep-3132/))
 9 | 
10 | ### python 3.3
11 | - introduction of **yield from**
12 | ([PEP380](https://peps.python.org/pep-0380/))
13 | 
14 | ### python 3.4
15 | - introduction of **pathlib**
16 | ([PEP 428](https://www.python.org/dev/peps/pep-0428/))
17 | 
18 | ### python 3.5
19 | - introduction of **type annotations**
20 | ([PEP 484](https://www.python.org/dev/peps/pep-0484/))
21 | - **ATTENTION**: you cannot use **type annotations** for variables yet; instead use type comments
22 | - introduction of **additional unpacking generalizations**
23 | ([PEP 448](https://peps.python.org/pep-0448/))
24 | 
25 | ### python 3.6
26 | - introduction of **type annotations** for variables
27 | ([PEP 526](https://www.python.org/dev/peps/pep-0526/))
28 | - **f-strings**
29 | ([PEP 498](https://www.python.org/dev/peps/pep-0498/))
30 | - introduction of **underscores in numeric literals**, e.g. `1_000`
31 | ([PEP 515](https://www.python.org/dev/peps/pep-0515/))
32 | 
33 | ### python 3.7
34 | - **postponed evaluation of annotations** via `from __future__ import annotations`
35 | ([PEP 563](https://www.python.org/dev/peps/pep-0563/))
36 | - **sort order of dicts** is now guaranteed
37 | - introduction of  `breakpoint()`, additionally to `import pdb;pdb.set_trace()`
38 | ([PEP 553](https://www.python.org/dev/peps/pep-0553/))
39 | - introduction of **data classes**
40 | ([PEP 557](https://www.python.org/dev/peps/pep-0557/))
41 | 
42 | ### python 3.8
43 | - introduction of the **walrus operator**
44 | ([PEP 572](https://www.python.org/dev/peps/pep-0572/))
45 | 
46 | ### python 3.9
47 | - **builtin generic types**, that means you can use `list` and `dict` for type annotations, instead of importing e.g. `from typing import List`
48 | ([PEP 585](https://www.python.org/dev/peps/pep-0585/))
49 | 
50 | ### python 3.10
51 | - allow writing union types as X | Y
52 | ([PEP 604](https://www.python.org/dev/peps/pep-0604/))
53 | - introduction of **structural pattern matching**, which is a kind of switch/case on steroids
54 | ([PEP 622](https://www.python.org/dev/peps/pep-0622/))
55 | 
56 | ### python 3.11
57 | - **exception groups and except\***, a new standard to raise and handle multiple unrelated exceptions simultaneously
58 | ([PEP654](https://peps.python.org/pep-0654/))
59 | - support for parsing TOML in the standard library via **tomllib**
60 | ([PEP 680](https://peps.python.org/pep-0680/))
61 | 
62 | ## official changelog
63 | 
64 | Do you need all the nitty gritty details?
65 | 
66 | - [official changelog](https://docs.python.org/3/whatsnew/changelog.html)
67 | 
68 | 
69 | ## contributing
70 | 
71 | Do you think this overview is useful? Share it!
72 | 
73 | Do you think you can contribute? Do not hesitate!
74 | 
75 | But let's keep it simple. This should not become a second changelog.
76 | 


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