py: use latest bounds API, replacing deprecated gils_ref methods

- also added a special value to --batch to process the entire file in one batch

src/cmd/python.rs

@@ -99,7 +99,8 @@ py options:
 
     -b, --batch <size>     The number of rows per batch to process before
                            releasing memory and acquiring a new GILpool.
-                           See https://pyo3.rs/v0.17.1/memory.html#gil-bound-memory
+                           Set to 0 to process the entire file in one batch.
+                           See https://pyo3.rs/v0.22.0/memory.html#gil-bound-memory
                            for more info. [default: 30000]
 
 Common options:
@@ -120,6 +121,7 @@ use indicatif::{ProgressBar, ProgressDrawTarget};
 use log::{error, log_enabled, Level::Debug};
 use pyo3::{
     intern,
+    prelude::*,
     types::{PyDict, PyModule},
     PyErr, PyResult, Python,
 };
@@ -164,7 +166,7 @@ struct Args {
     cmd_filter:       bool,
     arg_new_column:   Option<String>,
     arg_script:       String,
-    flag_batch:       u32,
+    flag_batch:       usize,
     flag_helper:      Option<String>,
     arg_input:        Option<String>,
     flag_output:      Option<String>,
@@ -243,16 +245,22 @@ pub fn run(argv: &[&str]) -> CliResult<()> {
     let mut batch_record = csv::StringRecord::new();
     let mut error_count = 0_usize;
 
+    let batch_size = if args.flag_batch == 0 {
+        util::count_rows(&rconfig)? as usize
+    } else {
+        args.flag_batch
+    };
+
     // reuse batch buffers
-    let mut batch = Vec::with_capacity(args.flag_batch as usize);
+    let mut batch = Vec::with_capacity(batch_size);
 
     // main loop to read CSV and construct batches.
     // we batch python operations so that the GILPool does not get very large
     // as we release the pool after each batch
     // loop exits when batch is empty.
     // see https://pyo3.rs/latest/memory.html#gil-bound-memory for more info.
     'batch_loop: loop {
-        for _ in 0..args.flag_batch {
+        for _ in 0..batch_size {
             match rdr.read_record(&mut batch_record) {
                 Ok(has_data) => {
                     if has_data {
@@ -275,19 +283,19 @@ pub fn run(argv: &[&str]) -> CliResult<()> {
 
         Python::with_gil(|py| -> PyResult<()> {
             let curr_batch = batch.clone();
-            let helpers = PyModule::from_code(py, HELPERS, "qsv_helpers.py", "qsv_helpers")?;
-            let batch_globals = PyDict::new(py);
-            let batch_locals = PyDict::new(py);
+            let helpers = PyModule::from_code_bound(py, HELPERS, "qsv_helpers.py", "qsv_helpers")?;
+            let batch_globals = PyDict::new_bound(py);
+            let batch_locals = PyDict::new_bound(py);
 
             let user_helpers =
-                PyModule::from_code(py, &helper_text, "qsv_user_helpers.py", "qsv_uh")?;
+                PyModule::from_code_bound(py, &helper_text, "qsv_user_helpers.py", "qsv_uh")?;
             batch_globals.set_item(intern!(py, "qsv_uh"), user_helpers)?;
 
             // Global imports
-            let builtins = PyModule::import(py, "builtins")?;
-            let math_module = PyModule::import(py, "math")?;
-            let random_module = PyModule::import(py, "random")?;
-            let datetime_module = PyModule::import(py, "datetime")?;
+            let builtins = PyModule::import_bound(py, "builtins")?;
+            let math_module = PyModule::import_bound(py, "math")?;
+            let random_module = PyModule::import_bound(py, "random")?;
+            let datetime_module = PyModule::import_bound(py, "datetime")?;
 
             batch_globals.set_item("__builtins__", builtins)?;
             batch_globals.set_item("math", math_module)?;
@@ -298,7 +306,7 @@ pub fn run(argv: &[&str]) -> CliResult<()> {
                 .getattr("QSVRow")?
                 .call1((headers.iter().collect::<Vec<&str>>(),))?;
 
-            batch_locals.set_item("col", py_row)?;
+            batch_locals.set_item("col", py_row.clone())?;
 
             let error_result = intern!(py, "<ERROR>");
 
@@ -323,7 +331,7 @@ pub fn run(argv: &[&str]) -> CliResult<()> {
                 py_row.call_method1(intern!(py, "_update_underlying_data"), (row_data,))?;
 
                 let result = py
-                    .eval(&args.arg_script, Some(batch_globals), Some(batch_locals))
+                    .eval_bound(&args.arg_script, Some(&batch_globals), Some(&batch_locals))
                     .map_err(|e| {
                         e.print_and_set_sys_last_vars(py);
                         error_count += 1;
@@ -332,7 +340,7 @@ pub fn run(argv: &[&str]) -> CliResult<()> {
                         }
                         "Evaluation of given expression failed with the above error!"
                     })
-                    .unwrap_or_else(|_| error_result.as_gil_ref());
+                    .unwrap_or_else(|_| error_result.clone().into_any());
 
                 if args.cmd_map {
                     let result = helpers