diff --git a/bindings/c_kzg.swg b/bindings/c_kzg.swg
index ddb5e8b..1578e87 100644
--- a/bindings/c_kzg.swg
+++ b/bindings/c_kzg.swg
@@ -6,17 +6,23 @@
 #include <stdbool.h>
 #include "c_kzg.h"
 #include "bls12_381.h"
+#include "test_util.h"
 %}
 %rename(alloc_poly) new_poly;
 %rename(alloc_poly_l) new_poly_l;
 
-%typemap(in, numinputs=0) OBJECT *out ($1_basetype tmp) { $1 = &tmp; }
-%typemap(argout) OBJECT *out {
+%typemap(in, numinputs=0) OBJECT *OUTPUT($1_basetype tmp) { $1 = &tmp; }
+%typemap(argout) OBJECT *OUTPUT {
   PyObject *obj = SWIG_NewPointerObj(memcpy(malloc(sizeof($1_basetype)),$1,sizeof($1_basetype)),
                                      $descriptor, SWIG_POINTER_NEW);
   $result = ($result == NULL) ? obj : SWIG_Python_AppendOutput($result, obj);
 }
-%apply OBJECT *out { fr_t *out, poly *out, poly_l *out }
+%apply OBJECT *OUTPUT {
+  fr_t *out, poly *out, poly_l *out,
+  g1_t *out, g2_t *out,
+  blst_scalar *out,
+  FFTSettings *out, KZGSettings *out
+}
 
 %typemap(in, numinputs=0) uint64_t out[4] (uint64_t tmp[4]) { $1 = tmp; }
 %typemap(argout) uint64_t out[4] {
@@ -29,7 +35,6 @@
 }
 
 %typemap(in) const uint64_t[4] (uint64_t tmp[4]) {
-  int i;
   if (PyTuple_Check($input)) {
     if (!PyArg_ParseTuple($input, "KKKK", tmp, tmp+1, tmp+2, tmp+3)) {
       PyErr_SetString(PyExc_TypeError, "tuple must have 4 elements");
@@ -43,8 +48,12 @@
 }
 
 %array_class(fr_t, frArray)
+%array_class(g1_t, g1Array)
+%array_class(g2_t, g2Array)
 %pointer_class(poly, polyp)
 %pointer_class(poly_l, poly_lp)
 
 %include "../src/c_kzg.h"
 %include "../src/bls12_381.h"
+%include "../inc/blst.h"
+%include "../src/test_util.h"
diff --git a/bindings/python/Makefile b/bindings/python/Makefile
index ab93c29..b4508c3 100644
--- a/bindings/python/Makefile
+++ b/bindings/python/Makefile
@@ -1,7 +1,7 @@
 INCLUDE_DIRS = .. ../../src ../../inc
 INCLUDE_PY = $(shell python -c 'import sysconfig; print(sysconfig.get_config_var("INCLUDEPY"))')
 
-_ckzg.so: c_kzg_wrap.c ../../src/libckzg.a ../../lib/libblst.a
+_ckzg.so: c_kzg_wrap.c ../../src/libckzg.a ../../lib/libblst.a ../../src/test_util.o
 	clang -O -Wall -shared -fPIC -Wl,-Bsymbolic -I${INCLUDE_PY} ${addprefix -I,${INCLUDE_DIRS}} -o $@ $^
 
 c_kzg_wrap.c ckzg.py: ../c_kzg.swg
diff --git a/bindings/python/example.py b/bindings/python/example.py
index 12ca6d1..607897f 100644
--- a/bindings/python/example.py
+++ b/bindings/python/example.py
@@ -10,7 +10,27 @@ cfa = ckzg.frArray(len(coeffs))
 for i, c in enumerate(coeffs):
     cfa[i] = c
 ret, pptr = ckzg.new_poly_with_coeffs(cfa.cast(), len(coeffs))
+assert ret == 0
 p = ckzg.polyp_frompointer(pptr).value()
 assert p.length == 4
 pcoeffs = ckzg.frArray_frompointer(p.coeffs)
 assert ckzg.fr_to_uint64s(pcoeffs[1]) == (2, 0, 0, 0)
+max_scale = 4
+ret, fs = ckzg.new_fft_settings(max_scale)
+assert ret == 0
+secret_s = ckzg.blst_scalar_from_uint64((29,3,1,4))
+num_secrets = 2 ** max_scale
+g1s = ckzg.g1Array(num_secrets)
+g2s = ckzg.g2Array(num_secrets)
+ckzg.generate_trusted_setup(g1s.cast(), g2s.cast(), secret_s, num_secrets)
+ret, ks = ckzg.new_kzg_settings(g1s.cast(), g2s.cast(), num_secrets, fs)
+assert ret == 0
+ret, p_l = ckzg.new_poly_l_from_poly(p, ks)
+assert ret == 0
+ret, y = ckzg.eval_poly_l(p_l, c2, fs)
+assert ret == 0
+print(ckzg.fr_to_uint64s(y))
+ckzg.free_poly(p)
+ckzg.free_poly_l(p_l)
+ckzg.free_fft_settings(fs)
+ckzg.free_kzg_settings(ks)
diff --git a/src/c_kzg.h b/src/c_kzg.h
index 5c5a5e9..70eec02 100644
--- a/src/c_kzg.h
+++ b/src/c_kzg.h
@@ -57,7 +57,7 @@ typedef struct {
     fr_t *reverse_roots_of_unity;  /**< Descending powers of the root of unity, size `width + 1`. */
 } FFTSettings;
 
-C_KZG_RET new_fft_settings(FFTSettings *s, unsigned int max_scale);
+C_KZG_RET new_fft_settings(FFTSettings *out, unsigned int max_scale);
 void free_fft_settings(FFTSettings *s);
 
 //
@@ -131,7 +131,7 @@ C_KZG_RET check_proof_single(bool *out, const g1_t *commitment, const g1_t *proo
 C_KZG_RET compute_proof_multi(g1_t *out, const poly *p, const fr_t *x0, uint64_t n, const KZGSettings *ks);
 C_KZG_RET check_proof_multi(bool *out, const g1_t *commitment, const g1_t *proof, const fr_t *x, const fr_t *ys,
                             uint64_t n, const KZGSettings *ks);
-C_KZG_RET new_kzg_settings(KZGSettings *ks, const g1_t *secret_g1, const g2_t *secret_g2, uint64_t length,
+C_KZG_RET new_kzg_settings(KZGSettings *out, const g1_t *secret_g1, const g2_t *secret_g2, uint64_t length,
                            const FFTSettings *fs);
 void free_kzg_settings(KZGSettings *ks);