python os module commit

Author: premkumargrk

os_py/os_module.py

@@ -0,0 +1,89 @@
+import os
+
+# -------------------------------
+# 📂 1. DIRECTORY OPERATIONS
+# -------------------------------
+# print("Current Working Directory:", os.getcwd())
+
+# # Create a new folder
+# os.mkdir("demo_folder")
+# print("\nAfter creating 'demo_folder':", os.listdir())
+
+# # Rename folder
+# os.rename("demo_folder", "renamed_folder")
+# print("After renaming:", os.listdir())
+
+# # Change directory
+# os.chdir("renamed_folder")
+# print("Now inside directory:", os.getcwd())
+
+# # Go back to parent directory
+# os.chdir("..")
+
+# # Remove directory
+# os.rmdir("renamed_folder")
+# print("After removing folder:", os.listdir())
+
+# -------------------------------
+# 🧭 2. PATH HANDLING
+# -------------------------------
+# print("\n--- Path Operations ---")
+# path = os.getcwd()
+
+# print("Absolute Path:", os.path.abspath(path))
+# print("Is Directory:", os.path.isdir(path))
+# print("Is File:", os.path.isfile(__file__))
+# print("File Name:", os.path.basename(__file__))
+# print("Directory Name:", os.path.dirname(__file__))
+# print("Path Exists:", os.path.exists(path))
+# print("Joined Path:", os.path.join(path, "sample.txt"))
+
+# -------------------------------
+# 🌍 3. ENVIRONMENT VARIABLES
+# -------------------------------
+# print("\n--- Environment Variables ---")
+# print("OS Name:", os.name)
+# print("Home Directory:", os.getenv("HOME") or os.getenv("USERPROFILE"))
+# print("Python Path:", os.getenv("PATH").split(";")[0])  # Show first path
+
+# # Setting and unsetting an environment variable
+# os.putenv("MY_VAR", "User_name")
+# print("MY_VAR (after putenv):", os.getenv("MY_VAR"))
+
+# os.unsetenv("MY_VAR")
+# print("MY_VAR (after unsetenv):", os.getenv("MY_VAR"))
+
+# -------------------------------
+# ⚙️ 4. SYSTEM COMMANDS
+# -------------------------------
+print("\n--- System Commands ---")
+# Example: list files using OS command
+os.system("dir" if os.name == "nt" else "ls")
+
+# -------------------------------
+# 🧱 5. PROCESS INFORMATION
+# -------------------------------
+print("\n--- Process Info ---")
+print("Process ID:", os.getpid())
+print("CPU Count:", os.cpu_count())
+
+# -------------------------------
+# 🔐 6. FILE ACCESS & PERMISSIONS
+# -------------------------------
+print("\n--- File Access & Permissions ---")
+filename = "testfile.txt"
+with open(filename, "a+") as f:
+    f.write("This is a test file for os module demo.\n")
+
+print("File Created:", filename)
+print("File Size:", os.path.getsize(filename), "bytes")
+print("Has Read Access:", os.access(filename, os.R_OK))
+print("Has Write Access:", os.access(filename, os.W_OK))
+
+# -------------------------------
+# 🧩 7. CLEANUP
+# -------------------------------
+os.remove(filename)
+print("\nFile Removed:", filename)
+
+# print("\n✅ All OS operations completed successfully!")