diff --git a/members/libpt-py/src/bintols/mod.rs b/members/libpt-py/src/bintols/mod.rs
new file mode 100644
index 0000000..ea0403f
--- /dev/null
+++ b/members/libpt-py/src/bintols/mod.rs
@@ -0,0 +1,56 @@
+use pyo3::prelude::*;
+
+use libpt::bintols as origin;
+
+mod display {
+    use pyo3::prelude::*;
+
+    use libpt::bintols::display as origin;
+
+    #[pyfunction]
+    pub fn bytes_to_bin(data: &[u8]) -> String {
+        origin::bytes_to_bin(data)
+    }
+
+    #[pyfunction]
+    pub fn byte_bit_display(data: usize) -> String {
+        origin::byte_bit_display(data)
+    }
+
+    #[pyfunction]
+    pub fn humanbytes(total: u128) -> String {
+        origin::humanbytes(total)
+    }
+
+    /// implement a python module in Rust
+    pub fn submodule(py: Python, parent: &PyModule) -> PyResult<()> {
+        let module = PyModule::new(py, "display")?;
+
+        module.add_function(wrap_pyfunction!(bytes_to_bin, module)?)?;
+        module.add_function(wrap_pyfunction!(byte_bit_display, module)?)?;
+        module.add_function(wrap_pyfunction!(humanbytes, module)?)?;
+
+        parent.add_submodule(module)?;
+        Ok(())
+    }
+}
+
+/// implement a python module in Rust
+pub fn submodule(py: Python, parent: &PyModule) -> PyResult<()> {
+    let module = PyModule::new(py, "bintols")?;
+
+    // binary constants
+    module.add("KIBI", origin::KIBI)?;
+    module.add("MEBI", origin::MEBI)?;
+    module.add("GIBI", origin::GIBI)?;
+    module.add("TEBI", origin::TEBI)?;
+    module.add("PEBI", origin::PEBI)?;
+    module.add("EXBI", origin::EXBI)?;
+    module.add("ZEBI", origin::ZEBI)?;
+    module.add("YOBI", origin::YOBI)?;
+
+    display::submodule(py, module)?;
+
+    parent.add_submodule(module)?;
+    Ok(())
+}
diff --git a/members/libpt-py/src/lib.rs b/members/libpt-py/src/lib.rs
index c595ba1..d66858e 100644
--- a/members/libpt-py/src/lib.rs
+++ b/members/libpt-py/src/lib.rs
@@ -4,6 +4,8 @@
 mod core;
 #[cfg(feature = "log")]
 mod log;
+#[cfg(feature = "bintols")]
+mod bintols;
 
 use pyo3::prelude::*;
 
@@ -20,6 +22,9 @@ fn libpt_py(py: Python, m: &PyModule) -> PyResult<()> {
     m.add_function(wrap_pyfunction!(version, m)?)?;
     #[cfg(feature = "core")]
     core::submodule(py, m)?;
+    #[cfg(feature = "log")]
     log::submodule(py, m)?;
+    #[cfg(feature = "bintols")]
+    bintols::submodule(py, m)?;
     Ok(())
 }