Question

我有一个5行长的JSON文件。我想将每一行写到一个单独的文件中，即将line1写入file1，将line2写入file2等

现在，我试图将文件写入文件中，但是数据排成一行并且混乱，并且在写入文件中的每个键和值之前都有一个奇怪的'u'。

import json

with open("test1.json") as f:
    with open("1.json","w") as o:
        lines = f.readline()
        for line in lines:
            y =  json.loads(line)
            print(y)
            json.dump(y,o)

Answer 1

   linecount = 0 
   with open("test1.json") as f:
        lines = f.readline()
        for line in lines:
            linecount = linecount + 1
            with open(str(linecount)+".json","w") as o:
                y =  json.loads(line)
                print(y)
                o.writelines(y)

已更新：添加了@tripleee建议

fp = open("test1.json",'r')
for i, line in enumerate(fp):
    with open(str(i)+".json","w") as o:
        y =  json.loads(line)
        print(y)
        o.writelines(y)

除此行with open("1.json","w") as o:外，您的代码看起来都很不错更改此行以为每行创建新文件

逻辑是-计算行数，使用linecount.json创建文件并转储json

Answer 2

最有效的方法是：

with open('test1.json').readlines() as json_data:  # readlines returns a list containing each line as seperate items
    for i in range(len(json_data)):  # For loop allows this to work with any number of lines
        file = open(f'{str(i+1)}.json', 'w')  # Same as '{str(i+1)}.json'.format() or str(i+1)+'.json'
        file.write(json_data[i])
        file.close()
        # print(json.loads(json_data[i]) # Uncomment if you want to print the content of each line

这使您可以处理任意数量的行-为您动态命名输出文件。

字符串前面的u（如u'string'）表示unicode字符串。现在已弃用python语言-默认字符串类型是unicode。现在仅在python 3中才与python 2兼容。

（来源：What's the u prefix in a Python string?）

python如何将每一行写为一个文件

2 个答案: