JSON形式の辞書リストデータ

member_list = [
    {'No': 1, 'Name': 'Yamada Taro',   'LastLoginTime': '2021-03-16 15:44:16'}, 
    {'No': 2, 'Name': 'Yamada Jiro',   'LastLoginTime': '2021-03-10 00:12:17'}, 
    {'No': 3, 'Name': 'Yamada Saburo', 'LastLoginTime': '2021-03-20 12:01:02'}, 
    {'No': 4, 'Name': 'Yamada Shiro',  'LastLoginTime': '2020-12-24 00:00:13'}, 
    {'No': 5, 'Name': 'Yamada Goro',   'LastLoginTime': '2021-03-17 11:01:55'}, 
]

JSON形式の辞書リストから特定のキーの値のリストを取得

# Name列を取得
name_list = [member.get('Name') for member in member_list]

# LastLoginTime列を取得
lastLoginTime_list = [lastLoginTime.get('LastLoginTime') for lastLoginTime in member_list]

print(name_list)
print(lastLoginTime_list)

出力結果

['Yamada Taro', 'Yamada Jiro', 'Yamada Saburo', 'Yamada Shiro', 'Yamada Goro']
['2021-03-16 15:44:16', '2021-03-10 00:12:17', '2021-03-20 12:01:02', '2020-12-24 00:00:13', '2021-03-17 11:01:55']

最大値／最小値を取得

# 最大値を取得
max_lastLoginTime_list = max(lastLoginTime_list)

# 最小値を取得
min_lastLoginTime_list = min(lastLoginTime_list)

print(max_lastLoginTime_list)
print(min_lastLoginTime_list)

出力結果

2021-03-20 12:01:02
2020-12-24 00:00:13

以上