Python JSON dump/append到.txt，每个变量都在新行上

Question

hostDict = {"key1": "val1", "key2": "val2", "key3": {"sub_key1": "sub_val2", "sub_key2": "sub_val2", "sub_key3": "sub_val3"}, "key4": "val4"}

g = open('data.txt', 'a')
with g as outfile:
  json.dump(hostDict, outfile)

这会将每个字典附加到“data.txt”，但它是内联的。我希望每个字典条目都是新的行。如有任何建议将不胜感激。

Answer 1

你的问题有点不清楚。如果在循环中生成hostdict:

with open('data.txt', 'a') as outfile:
    for hostDict in ....:
        json.dump(hostDict, outfile)
        outfile.write('\n')

如果您的意思是希望hostdict中的每个变量都在一个新行上：

with open('data.txt', 'a') as outfile:
    json.dump(hostDict, outfile, indent=2)

设置indent关键字参数时，它会自动添加换行符。