From a9994591ce5987365793eb6a1ddccdaf4193e03d Mon Sep 17 00:00:00 2001
From: Nickolai Belakovski <nbelakovski@gmail.com>
Date: Mon, 18 Mar 2024 16:55:58 +0800
Subject: [PATCH] PR feedback

---
 python/_prima.cpp        | 10 +++++-----
 python/prima/__init__.py |  2 +-
 python/prima/_bounds.py  |  2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/python/_prima.cpp b/python/_prima.cpp
index 4adbf29421..7d32423e65 100644
--- a/python/_prima.cpp
+++ b/python/_prima.cpp
@@ -161,7 +161,7 @@ PYBIND11_MODULE(_prima, m) {
       // Process options.
       prima_options_t options;
       prima_init_options(&options);
-      if (options_dict.is_none() == false) {
+      if ( ! options_dict.is_none()) {
         if(options_dict.contains("ftarget"))   { options.ftarget   = options_dict["ftarget"].cast<double>(); }
         if(options_dict.contains("iprint"))    { options.iprint    = options_dict["iprint"].cast<int>(); }
         if(options_dict.contains("maxfev"))    { options.maxfun    = options_dict["maxfev"].cast<int>(); }
@@ -246,7 +246,7 @@ PYBIND11_MODULE(_prima, m) {
       }
 
       prima_callback_t cpp_callback_function_wrapper = nullptr;
-      if (python_callback_function_holder.is_none() == false) {
+      if ( ! python_callback_function_holder.is_none()) {
         cpp_callback_function_wrapper = [](const int n, const double x[], const double f, int nf, int tr,
                                 const double cstrv, int m_nlcon, const double nlconstr[], bool *terminate) {
           // In order for xlist to not copy the data from x, we need to provide a dummy base object
@@ -264,7 +264,7 @@ PYBIND11_MODULE(_prima, m) {
       //=====================
       //    Handle Bounds
       //=====================
-      if (lb.is_none() == false && ub.is_none() == false) {
+      if (( ! lb.is_none())  && ( ! ub.is_none())) {
         // Use the buffer protocol to avoid copying
         py::buffer_info lb_buffer_info  = lb.cast<py::buffer>().request();
         if (lb_buffer_info.format != "d")
@@ -283,7 +283,7 @@ PYBIND11_MODULE(_prima, m) {
       //==============================
       //  Handle Linear Constraints
       //==============================
-      if(A_eq.is_none() == false) {
+      if( ! A_eq.is_none()) {
         py::buffer_info A_eq_buffer_info  = A_eq.cast<py::buffer>().request();
         if (A_eq_buffer_info.format != "d")
         {
@@ -298,7 +298,7 @@ PYBIND11_MODULE(_prima, m) {
         }
         problem.beq = (double*) b_eq_buffer_info.ptr;
       }
-      if(A_ineq.is_none() == false) {
+      if( ! A_ineq.is_none()) {
         py::buffer_info A_ineq_buffer_info  = A_ineq.cast<py::buffer>().request();
         if (A_ineq_buffer_info.format != "d")
         {
diff --git a/python/prima/__init__.py b/python/prima/__init__.py
index afee7b08e9..10ff27369b 100644
--- a/python/prima/__init__.py
+++ b/python/prima/__init__.py
@@ -133,7 +133,7 @@ def minimize(fun, x0, args=(), method=None, bounds=None, constraints=(), callbac
         m_nlcon = len(nlconstr0)
         f0 = fun(x0)
     else:
-        m_nlcon = None
+        m_nlcon = 0
         f0 = None
 
     return _minimize(
diff --git a/python/prima/_bounds.py b/python/prima/_bounds.py
index 7255498fe4..89afe9529f 100644
--- a/python/prima/_bounds.py
+++ b/python/prima/_bounds.py
@@ -3,7 +3,7 @@
 
 def process_bounds(bounds, lenx0):
     '''
-    bounds can either be an object with the properties lb and ub, or a list of tuples
+    `bounds` can either be an object with the properties lb and ub, or a list of tuples
     indicating a lower bound and an upper bound for each variable. If the list contains
     fewer entries than the length of x0, the remaining entries will generated as -/+ infinity.
     Some examples of valid lists of tuple, assuming len(x0) == 3: