when i run Jupyter Lab gives me an error and modifies my code

I tried to run this part of code

file = pd.read_csv(‘./CIC-IDS-2017/file.csv’).sample(frac=1).reset_index(drop=True)
file2 = pd.read_csv(‘./CIC-IDS-2017/file2.csv’).sample(frac=1).reset_index(drop=True)

Jupyter lab gives me this error:

file2 = pd.read_csv(‘./CIC-IDS-2017/file2.csv’).sample(frac=1).reset_index(drop=True=True)
SyntaxError: invalid syntax
if i refresh the page ,the code results as in the error and even if i fix it it gives me similar errors and change the code again as in the error.
Anyone knows how to fix this problem?