diff --git a/.tool-versions b/.tool-versions
index cbe95a6..615fb30 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1,2 +1,3 @@
 java temurin-21.0.3+9.0.LTS
 maven 3.9.6
+pyton 3.13.3
diff --git a/pom.xml b/pom.xml
index 4d39253..dc5c856 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,6 +6,7 @@
     <packaging>pom</packaging>
     <modules>
         <module>java-kit</module>
+        <module>py-kit</module>
     </modules>
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
diff --git a/py-kit/app-basic.py b/py-kit/app-basic.py
new file mode 100644
index 0000000..7220c6e
--- /dev/null
+++ b/py-kit/app-basic.py
@@ -0,0 +1,32 @@
+def do_foo():
+    if n % 2 == 1:
+        print('Weird')
+        return
+    if 1 < n < 6:
+        print('Not Weird')
+    if 5 < n < 12:
+        print('Weird')
+    if 19 < n:
+        print('Not Weird')
+
+
+def log_base_10(n):
+    if n == 0:
+        return float('-inf')  # Logarithm of 0 is undefined
+    count = 0
+    while n >= 1:
+        n /= 10
+        count += 1
+    return count
+
+
+if __name__ == '__main__':
+    n = 102
+    out = 0
+    for i in range(1, n + 1):
+        power = (i // 10 + 1)
+
+        # print(i, i / 10, log_base_10(i), pow(10, log_base_10(i) - 1), pow(10, power))
+        out = out * pow(10, log_base_10(i)) + i
+
+    print(out)
diff --git a/app.py b/py-kit/app.py
similarity index 100%
rename from app.py
rename to py-kit/app.py
diff --git a/py-kit/pom.xml b/py-kit/pom.xml
new file mode 100644
index 0000000..b02d205
--- /dev/null
+++ b/py-kit/pom.xml
@@ -0,0 +1,11 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>com.olexyn</groupId>
+        <artifactId>field-kit</artifactId>
+        <version>1.0</version>
+    </parent>
+    <artifactId>py-kit</artifactId>
+    <packaging>jar</packaging>
+    <!-- dummy -->
+</project>
diff --git a/py-kit/print-with-log.py b/py-kit/print-with-log.py
new file mode 100644
index 0000000..935e107
--- /dev/null
+++ b/py-kit/print-with-log.py
@@ -0,0 +1,20 @@
+def log_base_10(n):
+    if n == 0:
+        return float('-inf')  # Logarithm of 0 is undefined
+    count = 0
+    while n >= 1:
+        n /= 10
+        count += 1
+    return count
+
+
+if __name__ == '__main__':
+    n = 102
+    out = 0
+    for i in range(1, n + 1):
+        power = (i // 10 + 1)
+
+        # print(i, i / 10, log_base_10(i), pow(10, log_base_10(i) - 1), pow(10, power))
+        out = out * pow(10, log_base_10(i)) + i
+
+    print(out)