Question

我正在尝试使用python3将csv转换为json文件。目录中存在csv文件时，我不断收到此错误FileNotFound。请帮助我解决问题。下面是我尝试的代码。如果有人可以建议如何使用python3将MongoDB数据库转换为json文件，我也将不胜感激。

import csv, json, os

#get all csv files from the directory
dir_path = r'C:\Users\USER\Desktop\output_files'
inputfile = [file for file in os.listdir(dir_path) if file.endswith('.csv')]
print(inputfile)
for file in inputfile:
    with open(file, "r") as csvfile:
        reader = csv.DictReader(csvfile)
        for row in reader:
            id = row['ID']
            data[id] = row

使用此代码写出文件...

with open(outputfile, "a") as jsonfile:
    jsonfile.write(json.dumps(data, indent=4))

产生以下内容：

['adult_diapers.csv', 'groceries.csv', 'health_supplements.csv', 'mobility_aids.csv']

这是我的更详细的错误：

---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
<ipython-input-17-1aac06308031> in <module>
      6 print(inputfile)
      7 for file in inputfile:
----> 8     with open(file, "r") as csvfile:
      9         reader = csv.DictReader(csvfile)
     10         for row in reader:

FileNotFoundError: [Errno 2] No such file or directory: 'adult_diapers.csv'

Answer 1

是否指定了完整路径？看起来它只是文件名，而不是文件的完整路径。添加dir_path并使用os.path.join()连接路径和文件名，如下所示：

with open(os.path.join(dir_path, file), "r") as csvfile:
    reader = csv.DictReader(csvfile)

您的最终代码变为：

import csv, json, os

#get all csv files from the directory
dir_path = r'C:\Users\USER\Desktop\output_files'
inputfile = [file for file in os.listdir(dir_path) if file.endswith('.csv')]
print(inputfile)
for file in inputfile:
    with open(os.path.join(dir_path, file), "r") as csvfile:
        reader = csv.DictReader(csvfile)
        for row in reader:
            id = row['ID']
            data[id] = row

    with open(outputfile, "a") as jsonfile:
        jsonfile.write(json.dumps(data, indent=4))

使用python将.csv转换为.json

1 个答案: