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How can I open and close files safely in Python?

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open () opens a file. You can use it like:

 f = open (’my_file’,’ r + ’) my_file_data = () f.close () 

The above code opens "my_file" in read mode, then stores the data it reads from my_file into my_file_data and closes the file. The first argument is open &is the name of the file and the second &open mode. This determines how the file is opened.

 - If you want to read the file, pass in r - If you want to read and write the file, pass in r + - If you want to overwrite the file, pass in w - If you want to append to the file, pass in a 

When you open a file, the operating system gives a file descriptor to read / write the file. You should close it as soon as you are done using the file. If your program encounters an error and doesn’t call f.close (), then you haven’t released the file. To prevent this from happening, you can use with open (& # 8230;) like the f syntax, since it automatically closes files regardless of whether an error is encountered:

 with ope n (’ my_file’, ’r +’) as f: my_file_data = f. read ()