To open files in read/write mode, specify 'w+' as the mode. For example,
f = open('my_file.txt', 'w+') file_content = f.read() f.write('Hello World') f.close()
Above code opens my_file.txt in write mode, stores the file content in file_content variable and rewrites the file to contain "Hello World". You can also use r+ mode as it doesn't truncate the file.