関連ワード:  open a file in read mode in python    open the file in read only mode    open a file in read write mode python    open text file in read mode python    open csv file in read mode python    how to open a file in read and append mode in python    opening a file in python using read mode ('r')    what is the correct way to open a file in read mode in python    open csv file in read write mode python    how to open a file in both read and write mode in python