diff --git a/.gitignore b/.gitignore
index ebde723..c656996 100644
--- a/.gitignore
+++ b/.gitignore
@@ -173,4 +173,3 @@ cython_debug/
 # Built Visual Studio Code Extensions
 *.vsix
 
-*_.*
\ No newline at end of file
diff --git a/doa_py/__init__.py b/doa_py/__init__.py
new file mode 100644
index 0000000..3af46f4
--- /dev/null
+++ b/doa_py/__init__.py
@@ -0,0 +1,2 @@
+__version__ = "1.3.1"
+__author__ = "Qian Xu"
diff --git a/doa_py/algorithm/__init__.py b/doa_py/algorithm/__init__.py
new file mode 100644
index 0000000..96c3c28
--- /dev/null
+++ b/doa_py/algorithm/__init__.py
@@ -0,0 +1,4 @@
+from .broadband import *
+from .esprit_based import *
+from .music_based import *
+from .sparse import *