def __init__(self, sender=None, recipients=[], cc=[], bcc=[],
                 subject=None, text=None, html=None, charset=None,
                 attachments=[], embedded=[], headers=[]):
        self.sender = sender
        self.recipients = recipients if (list, tuple) in type(recipients) else [recipients]
        self.cc = cc
        self.bcc = bcc
        self.subject = subject
        self.text = text
        self.html = html
        self.attachments = attachments
        self.embedded = embedded
        self.charset = charset or 'utf-8'
        self.headers = headers
        self.compiled = False
dataset/ETHPy150Open harel/strudelpy/strudelpy/__init__.py/Email.__init__/swapped operands of `in`