import random

 def genFile(filename,block=1,size=1):

         f=open(filename,"wb")

         content=""

         #for j in range(1024*1024):

         for j in range(1):

                 content=bytes(b"")

                 #for i in range(1024):

                 for i in range(1):

                         c=chr(random.randint(0,255)).encode('utf-8')

                         content=content+c

                 f.write(content)

 print(len(sys.argv))

 if len(sys.argv) != 2:

         print("usage:\t"+sys.argv[0]+"\toutfilename")

         sys.exit(1)

 genFile(sys.argv[1],1024,1024*1024)