Python中文网 - 问答频道, 解决您学习工作中的Python难题和Bug
Python常见问题
我在一个JSON上迭代以检查是否存在一个键。我故意手动删除了所有没有钥匙的东西
我的示例JSON是：
{
"MODELER": {
"@version": "3",
"MODEL": {
"@BEGINDATE": "1970-01-01 00:00:00.0",
"@DESCRIPTION": "SendPro C 200/300/400 (CSD 2.0) t2019.02.08 u2019.02.12",
"@ENDDATE": "2117-05-03 08:24:36.0",
"@ID": "I_604356",
"@NAME": "SendProCSeries",
"@PATH": "PB.SMB.SendProCSeries",
"@SKU": "",
"@SUBASSEMBLY_TYPE": "MODEL",
"RULE": [
{
"@COMMENT": "",
"@DEFAULTPRIORITY": "50",
"@DESCRIPTION": "Pick Meter Equipment",
"@DISABLEFLG": "N",
"@DefinedOutsideTree": "true",
"@FIRINGPHASE": "",
"@NAME": "PickMeterEquipment",
"BOOLOP": {
"@BOOLOP": "and",
"@SEQ": "0",
"@TYPE": "0",
"BOOLOP": [
{
"@BOOLOP": "or",
"@SEQ": "1",
"@TYPE": "0",
"FRAGMENT": [
{
"@FUNC1": "value",
"@FUNC2": "literal",
"@NULLACTION": "Fragment is false",
"@OP": "=",
"@PROP1": "SALES_TYPE",
"@PROP2": "PURCHASE",
"@SEQ": "1",
"@TYPE": "1"
},
{
"@FUNC1": "value",
"@FUNC2": "literal",
"@NULLACTION": "Fragment is false",
"@OP": "=",
"@PROP1": "SALES_TYPE",
"@PROP2": "LEASE",
"@SEQ": "2",
"@TYPE": "1"
}
]
},
{
"@BOOLOP": "or",
"@SEQ": "2",
"@TYPE": "0",
"FRAGMENT": {
"@FUNC1": "value",
"@FUNC2": "list",
"@NULLACTION": "Fragment is false",
"@OP": "in",
"@PROP1": "PRICELIST",
"@PROP2": "LeaseAccounting",
"@SEQ": "1",
"@TYPE": "1"
}
},
{
"@BOOLOP": "or",
"@SEQ": "4",
"@TYPE": "0",
"FRAGMENT": [
{
"@FUNC1": "value",
"@FUNC2": "propval",
"@NULLACTION": "Fragment is false",
"@OP": "=",
"@PROP1": "PICK_SKU1",
"@PROP2": "._sku",
"@SEQ": "1",
"@TYPE": "1"
},
{
"@FUNC1": "value",
"@FUNC2": "propval",
"@NULLACTION": "Fragment is false",
"@OP": "=",
"@PROP1": "PICK_SKU10",
"@PROP2": "._sku",
"@SEQ": "2",
"@TYPE": "1"
}
]
}
]
},
"ACTION": [
{
"@FORMULA": "1",
"@PROPNAME": "",
"@PROPVALUE": "",
"@SEQ": "0",
"@TYPE": "1",
"LOCALES": null,
"ACTIONITEM": {
"@SEQ": "0",
"@item": ".",
"@max": "1",
"@min": "0",
"@qty": "1"
}
},
{
"@FORMULA": "",
"@PROPNAME": "_isViewable",
"@PROPVALUE": "1",
"@SEQ": "0",
"@TYPE": "2",
"LOCALES": null
}
]
},
{
"@COMMENT": "",
"@DEFAULTPRIORITY": "50",
"@DESCRIPTION": "Pick If External Selected",
"@DISABLEFLG": "N",
"@DefinedOutsideTree": "true",
"@FIRINGPHASE": "",
"@NAME": "PickIfExternalScaleSelected",
"@TRIGGER": "1",
"BOOLOP": {
"@BOOLOP": "and",
"@SEQ": "0",
"@TYPE": "0",
"FRAGMENT": [
{
"@FUNC1": "length",
"@FUNC2": "literal",
"@NULLACTION": "Fragment is false",
"@OP": ">",
"@PROP1": "ExternalScaleVal",
"@PROP2": "0",
"@SEQ": "1",
"@TYPE": "1"
},
{
"@FUNC1": "value",
"@FUNC2": "literal",
"@NULLACTION": "Fragment is false",
"@OP": "=",
"@PROP1": "_amEntitled",
"@PROP2": "1",
"@SEQ": "2",
"@TYPE": "1"
}
]
},
"ACTION": {
"@FORMULA": "1",
"@PROPNAME": "",
"@PROPVALUE": "",
"@SEQ": "0",
"@TYPE": "1",
"LOCALES": null,
"ACTIONITEM": {
"@SEQ": "0",
"@item": ".",
"@max": "1",
"@min": "0",
"@qty": "1"
}
}
},
{
"@COMMENT": "",
"@DEFAULTPRIORITY": "50",
"@NAME": "PickCAAA",
"BOOLOP": {
"@BOOLOP": "and",
"@SEQ": "0",
"@TYPE": "0",
"FRAGMENT": {
"@FUNC1": "value",
"@FUNC2": "literal",
"@NULLACTION": "Fragment is false",
"@OP": "=",
"@PROP1": "_description",
"@PROP2": "Dashboard",
"@SEQ": "1",
"@TYPE": "1"
}
},
"ACTION": {
"@FORMULA": "1",
"@PROPNAME": "",
"@PROPVALUE": "",
"@SEQ": "0",
"@TYPE": "1",
"LOCALES": null,
"ACTIONITEM": {
"@SEQ": "0",
"@item": ".",
"@max": "1",
"@min": "0",
"@qty": "1"
}
}
},
{
"@COMMENT": "",
"@DEFAULTPRIORITY": "50",
"@DESCRIPTION": "Pick ERB4 when ZHD8",
"@DISABLEFLG": "N",
"@FIRINGPHASE": "",
"@NAME": "AUTOSELECT: ERB4",
"@RULECLASSIFICATION": "PICK",
"@TRIGGER": "1",
"BOOLOP": {
"@BOOLOP": "and",
"@SEQ": "0",
"@TYPE": "0",
"FRAGMENT": {
"@FUNC1": "value",
"@FUNC2": "literal",
"@NULLACTION": "Fragment is false",
"@OP": "=",
"@PROP1": "_sku",
"@PROP2": "ZHD8",
"@SEQ": "1",
"@TYPE": "1"
}
},
"ACTION": [
{
"@FORMULA": "1",
"@PROPNAME": "",
"@PROPVALUE": "",
"@SEQ": "0",
"@TYPE": "1",
"LOCALES": null,
"ACTIONITEM": {
"@SEQ": "0",
"@item": ".",
"@max": "1",
"@min": "0",
"@qty": "1"
}
},
{
"@FORMULA": "",
"@PROPNAME": "_isViewable",
"@PROPVALUE": "1",
"@SEQ": "0",
"@TYPE": "2",
"LOCALES": null
}
]
}
]
}
}
}
现在，我想检查JSON中是否存在特定的子键。为此，我编写了一个函数，它应该基于子键条件打印父键
函数如下所示：
def getTargetPickRules(json_rule_data):
for i in json_rule_data['MODELER']['MODEL']['RULE']:
if 'ACTION' not in i:
continue
if 'ACTIONITEM' not in i['ACTION']:
continue
print("Rule Name - %s %s" % (i['@NAME'],i['ACTION']))
理想情况下，预期输出应为：
Rule Name - PickMeterEquipment [{'@FORMULA': '1', '@PROPNAME': '', '@PROPVALUE': '', '@SEQ': '0', '@TYPE': '1', 'LOCALES': None, 'ACTIONITEM': {'@SEQ': '0', '@item': '.', '@max': '1', '@min': '0', '@qty': '1'}}, {'@FORMULA': '', '@PROPNAME': '_isViewable', '@PROPVALUE': '1', '@SEQ': '0', '@TYPE': '2', 'LOCALES': None}]
Rule Name - PickIfExternalScaleSelected {'@FORMULA': '1', '@PROPNAME': '', '@PROPVALUE': '', '@SEQ': '0', '@TYPE': '1', 'LOCALES': None, 'ACTIONITEM': {'@SEQ': '0', '@item': '.', '@max': '1', '@min': '0', '@qty': '1'}}
Rule Name - PickCAAA {'@FORMULA': '1', '@PROPNAME': '', '@PROPVALUE': '', '@SEQ': '0', '@TYPE': '1', 'LOCALES': None, 'ACTIONITEM': {'@SEQ': '0', '@item': '.', '@max': '1', '@min': '0', '@qty': '1'}}
Rule Name - AUTOSELECT: ERB4 [{'@FORMULA': '1', '@PROPNAME': '', '@PROPVALUE': '', '@SEQ': '0', '@TYPE': '1', 'LOCALES': None, 'ACTIONITEM': {'@SEQ': '0', '@item': '.', '@max': '1', '@min': '0', '@qty': '1'}}, {'@FORMULA': '', '@PROPNAME': '_isViewable', '@PROPVALUE': '1', '@SEQ': '0', '@TYPE': '2', 'LOCALES': None}]
如果您看到我的JSON，所有的ACTION键都有ACTIONITEM，但它只输出其中的2个。以下是我的实际输出：
Rule Name - PickIfExternalScaleSelected {'@FORMULA': '1', '@PROPNAME': '', '@PROPVALUE': '', '@SEQ': '0', '@TYPE': '1', 'LOCALES': None, 'ACTIONITEM': {'@SEQ': '0', '@item': '.', '@max': '1', '@min': '0', '@qty': '1'}}
Rule Name - PickCAAA {'@FORMULA': '1', '@PROPNAME': '', '@PROPVALUE': '', '@SEQ': '0', '@TYPE': '1', 'LOCALES': None, 'ACTIONITEM': {'@SEQ': '0', '@item': '.', '@max': '1', '@min': '0', '@qty': '1'}}
Tags： typeminitemlocalesseqmaxqtyformula
热门问题
- 为什么在使用strptime时会出现未进行转换的数据错误？
- 为什么在使用strptim时会出现这个datetime日期错误
- 为什么在使用StyleFrame时索引列的标题不显示sf.至excel()?
- 为什么在使用sum（）函数时会发生“int”对象不可调用的错误？
- 为什么在使用sympy.dsolve时会得到“'list'对象没有属性'func'”？
- 为什么在使用tabla时会得到一个空的数据帧？
- 为什么在使用tensorboard时需要add_graph（）的第二个参数？
- 为什么在使用TensorFlow Lite转换YOLOv4时，推断时间/大小没有改进？有什么可能的改进吗？
- 为什么在使用Tensorflow加载训练批时会出现内存泄漏？
- 为什么在使用tensorflow时会收到警告/错误（使用函数API，但未实现错误）
- 为什么在使用tetpyclient发出POST请求时出现403错误？
- 为什么在使用TextBlob时会出现HTTP错误？
- 为什么在使用TFIDF时出现错误“IndexError:list index out of range”pyspark.ml.feature？
- 为什么在使用timedelta格式化之后，我在python中的日期是错误的？
- 为什么在使用timeit或exec函数时，函数中的变量不会在提供的全局命名空间中搜索？
- 为什么在使用tkinter时不能使用复选框？
- 为什么在使用todoistpythonapi时会返回这个奇怪的ID？
- 为什么在使用TQM时，在调整图像大小时，处理时间会有很大的差异？
- 为什么在使用Tweepy下载用户时间线时收到错误消息
- 为什么在使用twitter帐户登录Django应用程序时重定向127.0.0.1:8000？
热门文章
- Python覆盖写入文件
- 怎样创建一个 Python 列表？
- Python3 List append()方法使用
- 派森语言
- Python List pop()方法
- Python Django Web典型模块开发实战
- Python input() 函数
- Python3 列表(list) clear()方法
- Python游戏编程入门
- 如何创建一个空的set?
- python如何定义(创建)一个字符串
- Python标准库 [The Python Standard Library by Ex
- Python网络数据爬取及分析从入门到精通（分析篇）
- Python3 for 循环语句
- Python List insert() 方法
- Python 字典(Dictionary) update()方法
- Python编程无师自通 专业程序员的养成
- Python3 List count()方法
- Python 网络爬虫实战 [Web Crawler With Python]
- Python Cookbook（第2版）中文版
一个可能的问题是在某些条目中有多个操作。当您使用json模块将json加载到字典中时，库在出现重复键时的默认行为是保留重复键的最新值。这是因为python中的字典不能有重复的键。在您的例子中，json中后面的ACTION版本没有ACTIONITEM
示例：
您的数据不一致： 有些动作词典包含一个词典（其中该词典包含元素
"ACTIONITEM"），但有些包含一个列表（以[开头）。要么数据是错误的，要么你必须更准确地说明你想要的行为相关问题 更多 >
编程相关推荐