chore: checkpoint before Python removal

vendor/flate2/examples/deflateencoder-bufread.rs

@@ -0,0 +1,22 @@
+use flate2::bufread::DeflateEncoder;
+use flate2::Compression;
+use std::fs::File;
+use std::io;
+use std::io::prelude::*;
+use std::io::BufReader;
+
+// Open file and debug print the contents compressed with Deflate
+fn main() {
+    println!("{:?}", open_hello_world().unwrap());
+}
+
+// Opens sample file, compresses the contents and returns a Vector or error
+// File wrapped in a BufReader implements Bufread
+fn open_hello_world() -> io::Result<Vec<u8>> {
+    let f = File::open("examples/hello_world.txt")?;
+    let b = BufReader::new(f);
+    let mut deflater = DeflateEncoder::new(b, Compression::fast());
+    let mut buffer = Vec::new();
+    deflater.read_to_end(&mut buffer)?;
+    Ok(buffer)
+}