Pangram checker

You are encouraged to solve this task according to the task description, using any language you may know.
A pangram is a sentence that contains all the letters of the English alphabet at least once.

For example:   The quick brown fox jumps over the lazy dog.



Task

Write a function or method to check a sentence to see if it is a   pangram   (or not)   and show its use.



Related tasks

   determine if a string has all the same characters
   determine if a string has all unique characters


import string, sys
if sys.version_info[0] < 3:
    input = raw_input
 
def ispangram(sentence, alphabet=string.ascii_lowercase):
    alphaset = set(alphabet)
    return alphaset <= set(sentence.lower())
 
print ( ispangram(input('Sentence: ')) )