Added pangram implementation

Author: OmkarPathak

pygorithm/string/pangram.py

@@ -0,0 +1,15 @@
+# Author: OMKAR PATHAK
+# Created On: 17th August 2017
+
+def is_pangram(sentence):
+    '''
+        PANGRAM: A sentence containing every letter of the alphabet.
+    '''
+    alphabet = list(map(chr, range(97, 123)))
+    formattedString = ''.join(c for c in sentence if c.isalpha()).lower()
+    return set(alphabet) == set(formattedString)
+
+def get_code():
+    """ returns the code for the current class """
+    import inspect
+    return inspect.getsource(is_pangram)