September 2014
Intermediate to advanced
332 pages
6h 48m
Japanese
Content preview from Python文法詳解
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254
第 7 章 データ型とプロトコル
す。文字列の変換結果は、改行文字などの文字をエスケープシーケンスに変換した、文字列リテラ
ルとなります。
>>> s = '''
...
...
'''
>>> print(s)
複数行
の
文字列
>>> print(repr(s))
'
複数行
\n
の
\n
文字列
'
7.2.1
ascii( )
Python 2.x
までは、オブジェクトの文字列表現には
ASCII
文字だけが使われていて、日本語な
どの非
ASCII
文字は、
16
進形式（
\uXXXX
）などに変換されていました。
Python3
で、
Python2
と
同じ
ASCII
文字だけの文字列表現が必要な場合は、
repr()
ではなく
ascii()
関数で取得します。
ascii(object)
オブジェクトを、
ASCII
文字だけからなる文字列表現に変換します。
パラメタ
object
−
文字列に変換するオブジェクトを指定します。
>>> print(repr('
')) # repr()
では、そのまま出力される
'
スパム
'
>>> print(ascii('
')) #
非
ASCII
文字は、文字エスケープに変換される
'\u30b9\u30d1\u30e0'
7.2.2
文字列表現のカスタマイズ
ユーザ定義クラスでは、特殊メソッド
__repr__()
を定義すれば、
repr()
で変換される文字列
表現をカスタマイズできます。
__repr__(
self
)
repr()
などで呼び出され、オブジェクトの文字列表現を作成します。
>>> ...
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