add check

Makefile

@@ -1,4 +1,13 @@
-SHELL = /bin/sh
+pythonReq := $(shell python -c 'import yaml' > /dev/null 2>&1 && (echo "installed" )  || (echo "not installed "; exit 1)  )
+
+check:
+	@echo yaml module  $(pythonReq)
+
+
+all:
+	@echo Hello
+
+
 
 test:
 	echo "hello world"