What methods can be used to open a file in Python for reading or writing?

In Python, the open() function is used to open files. Main ways to open files for reading and writing:

• Reading:

  • open('filename', 'r') — open a file for reading (default mode).
  • open('filename', 'rb') — open a file for reading in binary mode.

• Writing:

  • open('filename', 'w') — open a file for writing; if the file exists, it will be overwritten.
  • open('filename', 'a') — open a file for appending data at the end.
  • open('filename', 'wb') — open a file for writing in binary mode.

Example of reading a file:

with open('example.txt', 'r', encoding='utf-8') as file:
    content = file.read()
    print(content)

Example of writing to a file:

with open('example.txt', 'w', encoding='utf-8') as file:
    file.write('Example of writing to a file')

Using the with statement guarantees automatic closing of the file after the work is done.