Added function to check the current user using subprocess

main.py

@@ -0,0 +1,44 @@
+import subprocess
+
+# list_files = subprocess.run(["ls", "-l"])
+# print("The exit code was: %d" % list_files.returncode)
+
+def remove_last_line(s):
+    return s[:s.rfind('\n')]
+
+
+def root_user_error():
+    print("You is root user. Exit")
+    exit(0)
+
+
+def return_current_user():
+    user = subprocess.run(["whoami"], stdout=subprocess.PIPE, text=True)    
+    user.stdout = remove_last_line(user.stdout)
+    return(user.stdout)
+
+
+# def return_home_dir():
+    # user_directory = subprocess.run(["ls"], stdout=subprocess.PIPE, text=True, input="~")
+    # user_directory.stdout = remove_last_line(user_directory.stdout)
+
+
+def this_command_exist_or_not(command):
+    result = subprocess.run([command], stdout=subprocess.DEVNULL)
+    if result.stdout == "":
+        return()
+
+
+def main():
+#   this_command_exist_or_not("lpinfo")
+#   install packages from packagelist without python
+    user = return_current_user()
+    if user == "root":
+        root_user_error()
+    
+    print("You are not root")
+#   get printers names
+
+
+if __name__ == '__main__':
+    main()