＊ pythonのoperatorモジュールで，独自定義のデータリストから要素の値を取り出す

python

:CATEGORIES: python

operator --- 関数形式の標準演算子 — Python 3.8.6rc1 ドキュメント https://docs.python.org/ja/3/library/operator.html

　上記のページを参考にやってみました。

class Lawyeries:
  def __init__(self, user, name):
    self.user = user
    self.name = name
  def __repr__(self):
    return "%s:%s" % (self.user, self.name)

list = [Lawyeries('fukazawas','深澤諭史'), Lawyeries('motoken_tw', 'モトケン')]
list.append(Lawyeries('uwaaaa', '刑裁サイ太'))

for x in list:
    key=operator.attrgetter('name')
    print(key(x))

for x in list:
    key=operator.attrgetter('user')
    print(key(x))

>>> import operator
>>> class Lawyeries:
... def __init__(self, user, name):
... self.user = user
... self.name = name
... def __repr__(self):
... return "%s:%s" % (self.user, self.name)
...
>>> list = [Lawyeries('fukazawas','深澤諭史'), Lawyeries('motoken_tw', 'モトケン')]
>>> list.append(Lawyeries('uwaaaa', '刑裁サイ太'))
>>>
>>> for x in list:
... key=operator.attrgetter('name')
... print(key(x))
...
深澤諭史
モトケン
刑裁サイ太
>>> for x in list:
... key=operator.attrgetter('user')
... print(key(x))
...
fukazawas
motoken_tw
uwaaaa
>>>
```