Python os

os_py/os_module.py

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+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. PROCESS INFORMATION
+# -------------------------------
+print("\n--- Process Info ---")
+print("Process ID:", os.getpid())
+print("CPU Count:", os.cpu_count())
+
+# -------------------------------
+# 🔐 5. 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))
+
+# -------------------------------
+# 🧩 6. CLEANUP
+# -------------------------------
+os.remove(filename)
+print("\nFile Removed:", filename)
+
+# print("\n✅ All OS operations completed successfully!")