我無法理解 python 字典
假設我有一個名為data的字典，如下所示：
{ "computers": [
{"Netbios_Name0": "apple1", "User_Domain0": "paradise", "User_Name0": "adam", "SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9058.1018"},
{"Netbios_Name0": "apple2", "User_Domain0": "paradise", "User_Name0": "lilith", "SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9040.1044"},
{"Netbios_Name0": "apple3", "User_Domain0": "paradise", "User_Name0": "eve", "SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9068.1026"}
]}
我想洗掉 apple2 所以我的最終結果如下所示：
{ "computers": [
{"Netbios_Name0": "apple1", "User_Domain0": "paradise", "User_Name0": "adam", "SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9058.1018"},
{"Netbios_Name0": "apple3", "User_Domain0": "paradise", "User_Name0": "eve", "SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9068.1026"}
]}
我懷疑我必須做這樣的事情：
for item in data['computers']:
if "apple2" in item['Netbios_Name0']:
item.pop() # or del data[item]
但我無法讓它作業。
uj5u.com熱心網友回復：
您可以使用remove()：
data = { "computers": [
{"Netbios_Name0": "apple1", "User_Domain0": "paradise", "User_Name0": "adam", "SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9058.1018"},
{"Netbios_Name0": "apple2", "User_Domain0": "paradise", "User_Name0": "lilith", "SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9040.1044"},
{"Netbios_Name0": "apple3", "User_Domain0": "paradise", "User_Name0": "eve", "SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9068.1026"}
]}
for item in list(data['computers']):
if 'apple2' in item['Netbios_Name0']:
data['computers'].remove(item)
data
輸出：
{'computers': [{'Netbios_Name0': 'apple1',
'User_Domain0': 'paradise',
'User_Name0': 'adam',
'SMS_Installed_Sites0': 'heaven',
'Client_Version0': '5.00.9058.1018'},
{'Netbios_Name0': 'apple3',
'User_Domain0': 'paradise',
'User_Name0': 'eve',
'SMS_Installed_Sites0': 'heaven',
'Client_Version0': '5.00.9068.1026'}]}
uj5u.com熱心網友回復：
您正在迭代一個串列 - 您可以按索引從串列中彈出。
迭代時切勿修改串列長度：如何在迭代時從串列中洗掉專案？
一種方法是存盤要洗掉的索引并在以后洗掉它們：
data = { "computers": [
{"Netbios_Name0": "apple1", "User_Domain0": "paradise", "User_Name0": "adam",
"SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9058.1018"},
{"Netbios_Name0": "apple2", "User_Domain0": "paradise", "User_Name0": "lilith",
"SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9040.1044"},
{"Netbios_Name0": "apple3", "User_Domain0": "paradise", "User_Name0": "eve",
"SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9068.1026"}
]}
to_delete = []
for idx, inner_dic in enumerate(data['computers']):
if "apple2" in inner_dic['Netbios_Name0']:
to_delete.append(idx)
# remove biggest to lowest indexes - removing does not influence the order
for idx in to_delete[::-1]:
data['computers'].pop(idx)
print(data)
輸出：
{'computers':
[{'Netbios_Name0': 'apple1', 'User_Domain0': 'paradise', 'User_Name0': 'adam',
'SMS_Installed_Sites0': 'heaven', 'Client_Version0': '5.00.9058.1018'},
{'Netbios_Name0': 'apple3', 'User_Domain0': 'paradise', 'User_Name0': 'eve',
'SMS_Installed_Sites0': 'heaven', 'Client_Version0': '5.00.9068.1026'}]
}
uj5u.com熱心網友回復：
Python 的內置 enumerate 函式允許我們遍歷串列并檢索串列中每個專案的索引和值：
data = { "computers": [
{"Netbios_Name0": "apple1", "User_Domain0": "paradise", "User_Name0": "adam", "SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9058.1018"},
{"Netbios_Name0": "apple2", "User_Domain0": "paradise", "User_Name0": "lilith", "SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9040.1044"},
{"Netbios_Name0": "apple3", "User_Domain0": "paradise", "User_Name0": "eve", "SMS_Installed_Sites0": "heaven", "Client_Version0": "5.00.9068.1026"}
]}
# Here 0 in 2nd argument is the starting number for num variable, can be used 0 to indicate as index
for num, computer in enumerate(data["computers"], 0):
if computer["Netbios_Name0"] == "apple2":
del data["computers"][num]
print(data)
這應該有效。
您可以在此處找到更多資訊：https ://realpython.com/iterate-through-dictionary-python/
轉載請註明出處，本文鏈接：https://www.uj5u.com/qukuanlian/465796.html