Python 基礎 - Day 2 Learning Note - Dictionary 字典

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Dictionary的運算式：{KEY: VALUE} 

• value 可以是string, list, or disctionary.  層層嵌套，e.g 多層菜單
• Dictionary的列印結果是無序的。因為可以通過key來尋找value內容，所有不用像list一樣，通過下標來尋找。
• key必須是唯一的，天生去重複。

Dataset = {    ‘Equity Fund‘: ‘Deep value‘,    ‘Balanced Fund‘: ‘Market oriented with a growth bias‘,    ‘Fixed Income Fund‘: [‘Government bond‘,‘Financial Notes‘,‘Credit Bond‘,‘MBS‘],}
print(Dataset)

{‘Equity Fund‘: ‘Deep value‘, ‘Balanced Fund‘: ‘Market oriented with a growth bias‘, ‘Fixed Income Fund‘: [‘Government bond‘, ‘Financial Notes‘, ‘Credit Bond‘, ‘MBS‘]}

添加

Dataset["Alternative Investment"] = ‘REITS‘  # 添加Key
print(Dataset)

{‘Equity Fund‘: ‘Deep value‘, ‘Balanced Fund‘: ‘Market oriented with a growth bias‘, ‘Fixed Income Fund‘: [‘Government bond‘, ‘Financial Notes‘, ‘Credit Bond‘, ‘MBS‘], ‘Alternative Investment‘: ‘REITS‘}

修改

Dataset["Equity Fund"] = ‘Fundamental Growth‘
Dataset[‘Fixed Income Fund‘][1] = ‘MTN‘
print(Dataset)

{‘Equity Fund‘: ‘Fundamental Growth‘, ‘Balanced Fund‘: ‘Market oriented with a growth bias‘, ‘Fixed Income Fund‘: [‘Government bond‘, ‘MTN‘, ‘Credit Bond‘, ‘MBS‘], ‘Alternative Investment‘: ‘REITS‘}

刪除

del Dataset[‘Equity Fund‘]print(Dataset)

or 

Dataset.pop("Equity Fund") print(Dataset)

or 隨機刪除

Dataset.popitem()

 

尋找

 

Python 基礎 - Day 2 Learning Note - Dictionary 字典