嵌套字典的字符串格式 [英] String formatting with nested dictionary
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问题描述
我正在尝试通过字符串格式从嵌套字典中写入多个键和相关值。我尝试了各种方法，但由于嵌套，我似乎运气不高。
I'm trying to write multiple keys and associated values from a nested dictionary via string formatting. I have tried various approaches but as it is nested I don't seem to be having much luck. Is this possible?
嵌套词典
defaultdict(None, {'Devicename': {'OS': 'version', 'Name': 'name'}, 'Devicename': {'OS': 'version', 'Name': 'name'}})
格式化数据
HEADER = '''
<html>
<head>
<h2>Summary</h2>
<tr>
<td><b>Device:</b> {0}</td>
</tr>
<table style="width:80%">
<tr>
<td><b>Name:</b> {1}</td>
<td><b>OS:</b> {2}</td>
</tr>
</table>
</head>
<body>
'''
写文件
with open("Summary.html", "w+") as outfile:
outfile.write(HEADER.format(device_dic[0], device_dic['Name'], device_dic['OS']))
#Potentially multiple items of each as shown in test dictionary. The `Devicename` varies so cant be called by string example ['OS'].
推荐答案
遍历字典以访问其内容。您可以使用 items（）词典方法一起遍历其键和值：
Loop through the dictionary to access its contents. You can use the items() dictionary method to loop through its keys and values together:
>>> a = collections.defaultdict(None, {'Devicename1': {'OS': 'version', 'Name': 'name'}, 'Devicename2': {'OS': 'version', 'Name': 'name'}})
>>> HEADER = '''
... <html>
... <head>
... <h2>Summary</h2>
... <tr>
... <td><b>Device:</b> {0}</td>
... </tr>
... <table style="width:80%">
... <tr>
... <td><b>Name:</b> {1}</td>
... <td><b>OS:</b> {2}</td>
... </tr>
... </table>
... </head>
... <body>
... '''
>>> for key,d in a.items():
... print(HEADER.format(key, d['Name'], d['OS']))
...
<html>
<head>
<h2>Summary</h2>
<tr>
<td><b>Device:</b> Devicename2</td>
</tr>
<table style="width:80%">
<tr>
<td><b>Name:</b> name</td>
<td><b>OS:</b> version</td>
</tr>
</table>
</head>
<body>
<html>
<head>
<h2>Summary</h2>
<tr>
<td><b>Device:</b> Devicename1</td>
</tr>
<table style="width:80%">
<tr>
<td><b>Name:</b> name</td>
<td><b>OS:</b> version</td>
</tr>
</table>
</head>
<body>
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