Question

我在同一个目录中有一个名为AsyncDownloaderTest且main.py和AsyncDownloader.py的项目。我刚刚开始学习python，但似乎问题在于导入。

main.py

from .AsyncDownloader import AsyncDownloader

ad = AsyncDownloader()
ad.setSourceCSV("https://people.sc.fsu.edu/~jburkardt/data/csv/grades.csv","First name")
print(ad.printURLs)

AsyncDownloader.py

import pandas as pd

class AsyncDownloader:

    """Download files asynchronously"""

    __urls = None



    def setSourceCSV(self, source_path, column_name):
        self.source_path = source_path
        self.column_name = column_name
        # TODO Check if path is a valid csv
        # TODO Store the urls found in column in a list
        my_csv = pd.read_csv(source_path, usecols=[column_name], chunksize=10)
        for chunk in my_csv:
            AsyncDownloader.urls += chunk.column_name

    def printURLs(self):
        print(AsyncDownloader.urls)

我收到以下错误

ModuleNotFoundError: No module named '__main__.AsyncDownloader'; '__main__' is not a package

Answer 1

您是否__init__.py与AsyncDownloader.py在同一目录中？应该这样做。

__init__.py是一个空文件，表示该目录包含包，并使该目录中的.py个文件可以导入函数和类。

您也可能会失去.中的领先from .AsyncDownloader。如果您愿意，可以通过将导入更改为绝对导入：

from enclosing_folder.AsyncDownloader import AsyncDownloader

在同一目录中导入类

1 个答案: