try:
num = float(raw_input("Enter a number: "))
except:
print "Something went wrong!"
try:
num = float(raw_input("\nEnter a number: "))
except(ValueError):
print "That was not a number!"
try:
num = float(raw_input("\nEnter a number: "))
except(ValueError):
print "That was not a number!"
else:
print "You entered the number", num