Implement str.count and add tests for it.

Also modify mp_get_index to accept:
1. Indices that are or evaluate to a boolean.
2. Slice indices.
Add tests for these two cases.

1 files changed, 1 insertions, 1 deletions

diff --git a/py/obj.h b/py/obj.h
index d41db37c0..dd80b3f02 100644
--- a/py/obj.h
+++ b/py/obj.h
@@ -267,7 +267,7 @@ void mp_obj_get_complex(mp_obj_t self_in, mp_float_t *real, mp_float_t *imag);
 #endif
 //qstr mp_obj_get_qstr(mp_obj_t arg);
 mp_obj_t *mp_obj_get_array_fixed_n(mp_obj_t o, machine_int_t n);
-uint mp_get_index(const mp_obj_type_t *type, machine_uint_t len, mp_obj_t index);
+uint mp_get_index(const mp_obj_type_t *type, machine_uint_t len, mp_obj_t index, bool is_slice);
 mp_obj_t mp_obj_len_maybe(mp_obj_t o_in); /* may return NULL */
 
 // none