json.dump/json.load

json.dump和json.load是Python中用于进行JSON数据的序列化和反序列化的方法。json.dump用于将dict类型的数据转换为str，并将其写入到json文件中，可以使用with open()的方式或者直接使用json.dump()将数据写入文件。例如：

import json

data = {'name': 'John', 'age': 30, 'city': 'New York'}
filename = 'data.json'

# Solution 1
json_str = json.dumps(data)
with open(filename, 'w') as f:
    f.write(json_str)

# Solution 2
json.dump(data, open(filename, 'w'))

而json.load则用于从json文件中读取数据，将其解析为Python数据结构。例如：

import json

filename = 'data.json'

# Solution 1
with open(filename, 'r') as f:
    json_str = f.read()
    data = json.loads(json_str)

# Solution 2
data = json.load(open(filename, 'r'))

这样就可以将json文件中的数据读取出来并转换为Python的dict类型了。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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