Python語法及語義

Python 語法及語義（Python syntax and semantics），Python 編程語言的語法是一組規則，用於定義 Python 程序將如何編寫與解釋（由運行時系統及人類讀者）。 ^[1]Python 語言與 Perl、C 以及 Java 有許多相似之處。不過，在這些語言之間仍存在著一些明確的差異。

關鍵字

Python有35個關鍵字或保留字；這些關鍵字或保留字不能用作標識符。^[2]^[3]

and
as
assert
async^{[note 1]}
await^{[note 1]}
break
class
continue
def
del
elif
else
except
False^{[note 2]}
finally
for
from
global
if
import
in
is
lambda
None
nonlocal^{[note 3]}
not
or
pass
raise
return
True^{[note 2]}
try
while
with
yield

註解

^ ^1.0 ^1.1 async and await were introduced in Python 3.5.^[4]
^ ^2.0 ^2.1 True and False became keywords in Python 3.0. Previously they were global variables.
^ nonlocal was introduced in Python 3.0.

註釋

^ "Readability counts." - PEP 20 - The Zen of Python
^ 2. Lexical analysis. Python 3 documentation. Python Software Foundation. [2021-03-11].
^ 2. Lexical analysis. Python v2.7.18 documentation. Python Software Foundation. [2021-03-11].
^ New Keywords. Python v3.5 documentation. Docs.python.org. [2016-06-01]. （原始内容存档于2016-06-18）.

外部連結

Python tutorial written by the author of Python, Guido van Rossum.

[keywordIn35-5] 1.0 ^1.1 async and await were introduced in Python 3.5.^[4]

[becameKeywordIn3-6] 2.0 ^2.1 True and False became keywords in Python 3.0. Previously they were global variables.

[keywordIn3-7] nonlocal was introduced in Python 3.0.

[1] "Readability counts." - PEP 20 - The Zen of Python

[2] 2. Lexical analysis. Python 3 documentation. Python Software Foundation. [2021-03-11].

[3] 2. Lexical analysis. Python v2.7.18 documentation. Python Software Foundation. [2021-03-11].

[4] New Keywords. Python v3.5 documentation. Docs.python.org. [2016-06-01]. （原始内容存档于2016-06-18）.

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