黃柏諺python字典
程式碼
a = { #台灣股票市場價值最大,何建誠python
2330: "台積電",
2317: "鴻海",
2454: "聯發科",
2412: '中華電'}
print(a)
print("用迴圈印出所有值")
for t in a:
print(a[t] +" 用get()方法 " + a.get(t))
a.update({1108:"幸福"})
print(a)
a.popitem()
print(a)
a.update({6505:"台塑化"})
a.update({2308:"台達電"})
print(a.keys())
print("練習values方法")
print(a.values())
print("練習items方法")
print(a.items())
w3schools字典方法
Python has a set of built-in methods that you can use on dictionaries.| Method方法 | Description說明 |
|---|---|
| clear() | 移除字典的Removes all the elements項目(items) from the dictionary |
| copy() | Returns a copy of the dictionary |
| fromkeys() | Returns a dictionary with the specified keys and value |
| get() | Returns the value of the specified key |
| items() | Returns a list containing a tuple for each key value pair |
| keys() | Returns a list containing the dictionary's keys |
| pop() | 移除某個項目Removes the element with the specified key |
| popitem() | 移除最後一個Removes the last inserted key-value pair |
| setdefault() | Returns the value of the specified key. If the key does not exist: insert the key, with the specified value |
| update() | 加入新項目Updates the dictionary with the specified key-value pairs |
| values() | Returns a list of all the values in the dictionary |
w3schools截圖
程式碼
a = { #台灣股票市場價值最大,何建誠python
2330: "台積電",
2317: "鴻海",
2454: "聯發科",
2412: '中華電'}
print(a)
print("用迴圈印出所有值")
for t in a:
print(a[t] +" 用get()方法 " + a.get(t))
a.update({1108:"幸福"})
print(a)
a.popitem()
print(a)
a.update({6505:"台塑化"})
a.update({2308:"台達電"})
print(a.keys())
print("練習values方法")
print(a.values())
print("練習items方法")
print(a.items())
w3schools字典方法
Python has a set of built-in methods that you can use on dictionaries.| Method方法 | Description說明 |
|---|---|
| clear() | 移除字典的Removes all the elements項目(items) from the dictionary |
| copy() | Returns a copy of the dictionary |
| fromkeys() | Returns a dictionary with the specified keys and value |
| get() | Returns the value of the specified key |
| items() | Returns a list containing a tuple for each key value pair |
| keys() | Returns a list containing the dictionary's keys |
| pop() | 移除某個項目Removes the element with the specified key |
| popitem() | 移除最後一個Removes the last inserted key-value pair |
| setdefault() | Returns the value of the specified key. If the key does not exist: insert the key, with the specified value |
| update() | 加入新項目Updates the dictionary with the specified key-value pairs |
| values() | Returns a list of all the values in the dictionary |
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