data = []
value = input("Enter a value (blank line to quit): ")

while value != " ":
     value = float(value)

data.append(value)
value = input("Enter a value (blank line to quit): ")
data.sort()

if len(data) == 0:
    print("No values were entered: ")

elif len(data) % 2 == 1:
     median = data[len(data) // 2]
     print("The median of those values is, median")

else:
    median = (data[len(data) // 2] + data[len(data) // 2 - 1]) / 2
    print("The median of those values is, median")