Python pangram

python/pangram/pangram.py

@@ -1,2 +1,6 @@
-def is_pangram():
+def is_pangram(inp):
-    pass
+    inp = inp.lower()
+    for i in "abcdefghijkklmnopqrstuvwxyz":
+        if inp.count(i) == 0:
+            return False
+    return True