Python 类型错误 : Required argument 'source' (pos 1) not found

Question

我得到一个错误:TypeError: Required argument 'source' (pos 1) not found但我不知道这意味着什么:/。任何人都可以让我走上正轨吗？我的代码是:

    def openFile(self,fileName):

    email_pattern = re.compile(r'\b[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}\b', re.IGNORECASE)

    with open(fileName) as lijstEmails: 
        self.FinalMailsArray.append([email_pattern.findall() for line in lijstEmails])
    self.writeToDB()

基本上它会在目录中打开一些文件，读取它们，然后寻找电子邮件地址并将它们写入数据库。

Answer 1

email_pattern.findall() 需要传递参数。所以你的代码应该是这样的 -

with open(fileName) as lijstEmails: 
    self.FinalMailsArray.append([email_pattern.findall(line) for line in lijstEmails])

请注意，email_pattern.findall() 返回一个列表，因此您最终将制作列表的列表。如果您确定每行最多包含 1 个 email_address，那么您可以使用 -

with open(fileName) as lijstEmails: 
    self.FinalMailsArray.append([email_pattern.findall(line)[0] for line in lijstEmails])