added use std::option::Option; and 16 as default

polars_hash/src/expressions.rs

@@ -12,8 +12,10 @@ use polars_core::datatypes::{
 use pyo3_polars::derive::polars_expr;
 use std::fmt::Write;
 use std::{str, string};
+use std::option::Option;
 use wyhash::wyhash as real_wyhash;
 
+
 pub fn blake3_hash_str(value: &str, output: &mut string::String) {
     let hash = blake3::hash(value.as_bytes());
     write!(output, "{}", hash).unwrap()

polars_hash/src/geohashers.rs

@@ -12,7 +12,7 @@ pub fn geohash_encoder(
             Some(len) => {
                 let base = match base {
                     Some(base) => base, // Use the provided base
-                    None => 32, // Default to base 32
+                    None => 16, // Default to base 16
                 };
                 Ok(Some(
                     encode(Coord { x: long, y: lat }, len as usize, base)