Python中提取嵌套字典内Analytical Properties字段问题求助

你的psets并非单个字典，而是包含两个字典的列表（原数据写法缺少外层列表的[]，属于语法错误，需要先修正）。之前的代码仅遍历了第一个字典的键值对，完全没处理第二个字典，因此只能获取到一个结果。

修正后的代码 #

常规循环写法

all_properties = []
# 遍历列表中的每个字典元素
for item in psets:
    # 检查当前字典是否包含目标键
    if 'Analytical Properties' in item:
        all_properties.append(item['Analytical Properties'])

print(all_properties)

简洁列表推导式写法

all_properties = [item['Analytical Properties'] for item in psets if 'Analytical Properties' in item]
print(all_properties)

修正原始数据格式 #

你的原始psets定义存在语法错误，需要给两个字典套上外层列表[]，正确格式如下：

psets = [
    {'Windows_Alumil_Supreme_S77_PHOS_Fixed:Windows_Alumil_S77_Fixed_9_triple_glazing:1016843': {'id': 66476}, 'Analytical Properties': {'Analytic Construction': '', 'Define Thermal Properties by': 'User Defined', 'Heat Transfer Coefficient (U)': 1.63, 'Solar Heat Gain Coefficient': 0.27, 'Thermal Resistance (R)': 0.6134969325153374, 'Visual Light Transmittance': 0.74, 'id': 66617}, 'Construction': {'Construction Type': 'Window', 'Wall Closure': 'By host', 'id': 66618}, 'Dimensions': {'Height': 0.55, 'Rough Height': 2.115, 'Rough Width': 0.5650000000000001, 'Width': 2.1, 'Window Inset Depth': 0.01, 'id': 66619}},
    {'Windows_Alumil_Supreme_S77_PHOS_Fixed:Windows_Alumil_S77_Fixed_8_triple_glazing:1016844': {'id': 68543}, 'Analytical Properties': {'Define Thermal Properties by': 'User Defined', 'Analytic Construction': '', 'Heat Transfer Coefficient (U)': 1.94, 'Solar Heat Gain Coefficient': 0.19, 'Thermal Resistance (R)': 0.5154639175257733, 'Visual Light Transmittance': 0.74, 'id': 68666}, 'Construction': {'Wall Closure': 'By host', 'Construction Type': 'Window', 'id': 68667}, 'Dimensions': {'Height': 0.55, 'Rough Height': 0.5650000000000001, 'Rough Width': 0.5650000000000001, 'Width': 0.55, 'Window Inset Depth': 0.01, 'id': 68668}}
]

内容的提问来源于stack exchange，提问作者Talha Siddiqui