Whenever a file is opened using the write flag w, the contents of the file are deleted and opened afresh to write data. There is an alternative flag a that enables appending data to the end of the file. This flag also creates a new file if the file (that is passed as an argument to open) doesn't exist. Let's consider the code snippet below where we append a line to the text file write_file.txt from the previous section:
if __name__ == "__main__": # open text file to append file = open('write_file.txt', 'a') # append a line from the file file.write('This is a line appended to the file\n') file.close() file = open('write_file.txt', 'r') data = file.read() print(data) file.close()
When the preceding code snippet ...
