No.031 [Python] 문자열의 분할 ②

1초에 한 번씩 문자열 분할에 대해 적어 보세요.

 I'll write about the split of strings in python"on this page a little.

■ 문자열 목록의 링크

 Link between sting lists

>>> # 文字列のリストを一つの文字列へ連結：文字列メソッドjoin()
>>> # 1.'挿入する文字列'でjoin()メソッドを呼び出す
>>> # 2. 連結する文字列のリストを引数として渡す
>>> 
>>> l = ["one", "two","three"]
>>> 
>>> print(",".join(l))
one,two,three
>>> 
>>> print("\n".join(l))
one
two
three
>>> 
>>> print(" ".join(l))
one two three
>>> 
>>> 
>>> # joinを使わなくても同じ表示結果となる
>>> 
>>> l = ["one", "two","three"]
>>> print(*l, sep=',')
one,two,three
>>> print(*l, sep='\n')
one
two
three
>>> print(*l)
one two three

■자수 분할: 슬라이스

 Division by the number of characters: Slice

>>> # 文字数による分割の場合は、Sliceを使用する
>>> 
>>> s = 'abcdefg'
>>> 
>>> print(s[:3])
abc
>>> 
>>> print(s[3:])
defg

>>> # タプルとして取得、また変数に代入も可能
>>> 
>>> s_tuple = s[:3], s[3:]
>>> 
>>> print(s_tuple)
('abc', 'defg')
>>> 
>>> print(type(s_tuple))
<class 'tuple'>
>>> 
>>> s_first, s_last = s[:3], s[3:]
>>> 
>>> print(s_first)
abc
>>> 
>>> print(s_last)
defg

>>> # ３分割することの可能
>>> 
>>> s = 'abcdefghij'
>>> 
>>> s_first, s_second, s_last = s[:3], s[3:6],s[6:]
>>> 
>>> print(s_first)
abc
>>> print(s_second)
def
>>> print(s_last)
ghij

>>> # 文字数は、組み込み関数len()で取得可能、半分ずつに分割可能
>>> 
>>> s = 'abcdefghij'
>>> 
>>> half = len(s) // 2
>>> 
>>> print(half)
5
>>> 
>>> s_first, s_last = s[:half], s[half:]
>>> 
>>> print(s_first)
abcde
>>> 
>>> print(s_last)
fghij

>>> # +演算子にて連結が可能
>>> 
>>> s = 'abcdefghij'
>>> 
>>> print(half)
5
>>> s_first, s_last = s[:half], s[half:]
>>> 
>>> print(s_first + s_last)
abcdefghij

>>> # 負数や大きな数を指定した場合
>>> 
>>> "abcdefg"[-3:]
'efg'
>>> "abcdefg"[-99:]
'abcdefg'
>>> "abcdefg"[99:]
''
>>> "abcdefg"[:99]
'abcdefg'
>>> 
>>> 
>>> # スキップ指定の場合
>>> 
>>> "abcdefg"[::2]
'aceg'
>>> "abcdefg"[1::2]
'bdf'

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