Add docstrings in py_module

.gitignore

@@ -1,2 +1,3 @@
 /target
 /env
+build.bat

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "subset_sum"
-version = "0.10.1"
+version = "0.10.2"
 edition = "2018"
 authors = ["Tomohiro Endo <europeanplaice@gmail.com>"]
 description = "Solves subset sum problem and returns a set of decomposed integers. It also can match corresponding numbers from two vectors and be used for Account reconciliation." 

src/py_module.rs

@@ -1,24 +1,37 @@
 use pyo3::prelude::*;
 
+/// Finds subsets sum of a target value. It can accept negative values.
 #[pyfunction]
+#[pyo3(text_signature = "(a, n, /)")]
 fn find_subset(a: Vec<i32>, n: i32) -> PyResult<Vec<Vec<i32>>> {
     use crate::dp_module::*;
     Ok(dp::find_subset(&a, n))
 }
 
+/// Finds subsets sum of a target value. It can't accept negative values but relatively faster.
 #[pyfunction]
+#[pyo3(text_signature = "(a, n, /)")]
 fn find_subset_fast_only_positive(a: Vec<u32>, n: usize) -> PyResult<Vec<Vec<u32>>> {
     use crate::dp_module::*;
     Ok(dp::find_subset_fast_only_positive(&a, n))
 }
 
+/// Finds the integers from two vectors that sum to the same value.
+/// This method assumes that the two vectors have One-to-Many relationships.
+/// Each integer of the `key` vector corresponds to the multiple integers of the `value` vector.
 #[pyfunction]
+#[pyo3(text_signature = "(key, targets, /)")]
 fn sequence_matcher(mut key: Vec<i32>, mut targets: Vec<i32>) -> PyResult<Vec<Vec<(Vec<i32>, i32)>>> {
     use crate::dp_module::*;
     Ok(dp::sequence_matcher(&mut key, &mut targets))
 }
 
+/// Finds the integers from two vectors that sum to the same value.
+/// This method assumes that the two vectors have Many-to-Many relationships.
+/// Each integer of the `key` vector corresponds to the multiple integers of the `value` vector.
+/// With this method, we can find multiple combinations of the integers.
 #[pyfunction]
+#[pyo3(text_signature = "(key, targets, /)")]
 fn sequence_matcher_m2m(mut key: Vec<i32>, mut targets: Vec<i32>) -> PyResult<Vec<Vec<(Vec<i32>, i32)>>> {
     use crate::dp_module::*;
     Ok(dp::sequence_matcher(&mut key, &mut targets))