import keyword

my_list = ["python", 'is', 'fun', 'to', 'learn']

print("The list is :")
print(my_list)

my_result = []
for element in my_list:
   for word in element.split():
      if keyword.iskeyword(word):
         my_result.append(word)

print("The result is :")
print(my_result)

The list is :
['python', 'is', 'fun', 'to', 'learn']
The result is :
['is']