【Python】文字列から文字を取り出す

[数字]の書式で文字列の特定場所の文字を取り出すことができます。

0から始まることに注意が必要です。

>>>
>>> a='kamotora.net'
>>> a
'kamotora.net'
>>> a[0]
'k'
>>> a[1]
'a'
>>> a[10]
'e'

>>>

>>> a='kamotora.net'

>>> a

'kamotora.net'

>>> a[0]

'k'

>>> a[1]

'a'

>>> a[10]

'e'

>>> a[15]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IndexError: string index out of range

>>> a[15]

Traceback (most recent call last):

File "<stdin>", line 1, in <module>

IndexError: string index out of range

>>> a[-1]
't'
>>> a[-15]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
IndexError: string index out of range

>>> a[-1]

't'

>>> a[-15]

Traceback (most recent call last):

File "<stdin>", line 1, in <module>

IndexError: string index out of range

>>> a[0-1]
't'
>>> a
'kamotora.net'
>>> a[0-2]
'e'
>>>

>>> a[0-1]

't'

>>> a

'kamotora.net'

>>> a[0-2]

'e'

>>>