在python中的字典中獲取鍵值不起作用

Question

我在python中有一個字典，如下所示。

path_definition = { 
     '00:00:00:00:00:01':'00:00:00:00:00:04', 
     '00:00:00:00:00:02':'00:00:00:00:00:05', 
     '00:00:00:00:00:03':'00:00:00:00:00:06', 
}; 

如果我做

for key in path_definition.keys() 
     print('value {}'.format(path_definition[key]) 

它似乎並沒有出於某種原因。

Answer 1

path_definition = { 
     '00:00:00:00:00:01':'00:00:00:00:00:04', 
     '00:00:00:00:00:02':'00:00:00:00:00:05', 
     '00:00:00:00:00:03':'00:00:00:00:00:06' #comma not required 
} #Semicolon not required 


for key in path_definition.keys(): #semicolon missing 
     print('value {}'.format(path_definition[key])) #extra parentheses missing 

Answer 2

您的是錯的，試試這個：

for key in path_definition.keys(): #colon is missed 
    print('value {}'.format(path_definition[key])) #a parenthesys is missed 

Answer 3

因爲你沒有在你的問題中提到，您所看到的錯誤（如果有的話），我看到兩個問題與您的代碼現在：

1. 您在for聲明末尾缺少:。
2. 您在print聲明末尾缺少)。

固定的：

>>> for key in path_definition.keys(): 
...  print('value {}'.format(path_definition[key])) 
... 
value 00:00:00:00:00:06 
value 00:00:00:00:00:05 
value 00:00:00:00:00:04