How to check mail library is loaded or not

To check if the Mail library is loaded or not in Python, you can use the following methods:

1. Importing the library and checking if it's available:

   import mail
   if mail:
    print("Mail library is loaded")
   else:
    print("Mail library is not loaded")

   This method checks if the mail module is available in the current Python environment. If it is, it prints "Mail library is loaded". If not, it prints "Mail library is not loaded".

2. Using the sys.modules dictionary:

   import sys
   if 'mail' in sys.modules:
    print("Mail library is loaded")
   else:
    print("Mail library is not loaded")

   This method checks if the mail module is present in the sys.modules dictionary, which contains a dictionary of all modules that have been loaded. If mail is present in the dictionary, it prints "Mail library is loaded". If not, it prints "Mail library is not loaded".

3. Using the importlib module:

   import importlib
   if importlib.util.find_spec('mail'):
    print("Mail library is loaded")
   else:
    print("Mail library is not loaded")

   This method uses the importlib module to check if the mail module is available. If it is, it prints "Mail library is loaded". If not, it prints "Mail library is not loaded".

Note that these methods only check if the mail library is available, but not if it's actually functional or configured correctly.