January 2018
Intermediate to advanced
856 pages
17h 17m
Chinese
Content preview from Python 技術手冊 第三版
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資料型別
|
55
Python
語
言
唯一不能成為三引號字串內容一部分的字元是未轉義（unescaped）的反
斜線，然而一個帶引號字串（quoted string）不能包含未轉義的反斜線、
斷行，或是圍住它的引號字元。反斜線字元起始一個
轉義序列
（
escape
sequence
），這能讓你在上述任一種字串中引入任何字元。我們在表 3-1 中
列出了 Python 的字串轉義序列。
表 3-1 字串轉義序列
序列 意義 ASCII/ISO 代碼
\<newline>
忽略行結尾 無
\\
Backslash（反斜線）
0x5c
\'
Single quote（單引號）
0x27
\"
Double quote（雙引號）
0x22
\a
Bell
0x07
\b
Backspace（退格）
0x08
\f
Form feed
0x0c
\n
Newline（新行）
0x0a
\r
Carriage return
0x0d
\t
Ta b
0x09
\v
Vertical tab
0x0b
\ DDD
八進位值
DDD
如給定的
\x XX
十六進位值
XX
如給定的
\ other
任何其他（other）字元：一個雙字元的字串
0x5c
+ 如給定的
字串字面值的一個變體是
原始字串
（
raw string
）。語法跟帶引號或三引號
字串字面值相同，只不過前導引號的前面緊接著一個
r
或
R
。在原始字串
中，轉義序列不會像表 3-1 所記載的那樣被解讀，而是照字面被複製到字
串中，包括反斜線和 newline 字元。原始字串語法適用於包含許多反斜線
的字串，特別是正規表達式的模式（regular expression ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.