# import io

**[import io](https://docs.python.org/3/library/io.html)** is a Python import that provides in-memory file-like objects. Use `StringIO` to treat strings as files, and `BytesIO` for binary data.

## Example

```python
# Python
# description: read/write to in-memory file objects

import io

# String buffer
string_buffer = io.StringIO()
string_buffer.write("Hello, ")
string_buffer.write("World!")

# Get contents
contents = string_buffer.getvalue()
print(contents)  # Hello, World!

# Read from string buffer
string_buffer.seek(0)  # Reset to start
print(string_buffer.read())  # Hello, World!

# Binary buffer
binary_buffer = io.BytesIO()
binary_buffer.write(b"Binary data")

binary_buffer.seek(0)
print(binary_buffer.read())  # b'Binary data'

# Use as file-like object
text_file = io.StringIO("Line 1\nLine 2\nLine 3\n")
for line in text_file:
    print(line.strip())
```

## Common classes

- `io.StringIO()`: in-memory text buffer
- `io.BytesIO()`: in-memory binary buffer
- `buffer.write(data)`: write to buffer
- `buffer.getvalue()`: get buffer contents
- `buffer.seek(position)`: move position
- `buffer.read()`: read from buffer
- `buffer.readline()`: read one line