python 想导入txt但是路径错误

**import nltk
a = open (r"C:\Users\dell\AppData\Local\Temp\yourgroupname_myData.txt").read()
a
**
FileNotFoundError Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_23392/335216202.py in
----> 1 a = open (r"C:\Users\dell\AppData\Local\Temp\yourgroupname_myData.txt").read()

FileNotFoundError: [Errno 2] No such file or directory: 'C:\Users\dell\AppData\Local\Temp\yourgroupname_myData.txt'

NameError Traceback (most recent call last)
~\AppData\Local\Temp/ipykernel_23392/2167009006.py in
----> 1 a

NameError: name 'a' is not defin

http://localhost:8888/notebooks/Untitled1.ipynb?kernel_name=python3

那文件路径到底对不对啊