2 errors in code

[numbnumb54]

I get the following errors from my code:

Error:
attachment  = open(Assessments, 'rb')
TypeError: expected str, bytes or os.PathLike object, not list

Error:
]File "C:\Users\Matti\Desktop\[COPY]attaching MULTIPLE files.py", line 31, in <module>
    file_path = os.path.join(dir_path, assess)
NameError: name 'dir_path' is not defined

What I'm trying to do is send several attachments (files, not images) and not just one. I managed with one, but for some reason several is hard for me to grasp.
I am learning Python via project building and not tutorials because I can't learn general programming concepts from tutorials using bland short examples and apply it immediately to my project, unfortunately, so I need help here.
I would appreciate any pointers.

 
import os
import smtplib
from email.mime.text import MIMEText
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email import encoders



#Notice we are using Windows "Enviornment Variables", in order to hide our sensitive data
Email_User = os.environ.get("Andree_Email")

Email_Password = os.environ.get("Andree_Pass")

Subject = "Python"

msg = MIMEMultipart()
msg['From'] = Email_User
msg['To'] = "[email protected]"
msg['Subject'] = Subject

body = "Hi there. Sending this email from Python"
msg.attach(MIMEText(body, 'plain'))

#EDITED

Assessments = ["c:\\Users\\Matti\Desktop\\Python video left off.docx", "c:\\Users\\Matti\Desktop\\API variable.png", "c:\\Users\\Matti\Desktop\\mind tricks.docx"]
attachment  = open(Assessments, 'rb')

for assess in Assessments:  # add files to the message
        file_path = os.path.join(dir_path, assess)
        attachment = MIMEApplication(open(file_path, "rb").read(), _subtype="txt")
        attachment.add_header("c:\\Users\\Matti\Desktop\\Python video left off.docx","c:\\Users\\Matti\Desktop\\API variable.png","c:\\Users\\Matti\Desktop\\mind tricks.docx",'attachment', filename=assess)
        msg.attach(attachment)
        


part = MIMEBase('application','octet-stream')
part.set_payload((attachment).read())
encoders.encode_base64(part)
part.add_header('Content-Disposition',"attachment; filename= "+Assessments)


msg.attach(part)
text = msg.as_string()

server = smtplib.SMTP('smtp.gmail.com', 587)
server.starttls()

server.login(Email_User,Email_Password)



server.sendmail(Email_User,"[email protected]",text)

server.quit()

[eismb]

Regarding the TypeError: you are trying to open a list with three strings, instead of opening each string at a time.

Trying putting the open() statement inside the loop, and then using:

for assess in Assessments:  # add files to the message
    attachment  = open(assess, 'rb')

As for the NameError, you are using a variable, "dir_path", that wasn't previously defined within your code, so it doesn't exist yet. Define it somewhere at the beginning with the proper base path.

[Marbelous]

The open() function needs a path to a file but you have given it a list of paths. You then go on to refine attachment anyway so I'm not sure what you are trying to do there.

Your second error is simply because you have not defined the variable dir_path. Did you mean to use os.path.dirname() or something???