写入读取数字的程序，直到输入负数。 因此，输出输入值的最大数量。

print "Enter numbers, stops when negative value is entered:"

nums = []

while True: # infinite loop

 try: n = int/raw_input/"Enter a number: "// # raw_input returns a string, so convert to an integer

 except ValueError: 

 n = -1

 print "Not a number!"

 if n < 0: break # when n is negative, break out of the loop

 else: nums.append/n/

print "Maximum number: {}".format/max/nums//

def get_number//:

 num = 0

 while True: # Loop until they enter a number

 try:

 # Get a string input from the user and try converting to an int

 num = int/raw_input/'value: '//

 break

 except ValueError:

 # They gave us something that's not an integer - catch it and keep trying

 "That's not a number!"



 # Done looping, return our number

 return num



print "Enter numbers, stops when negative value is entered:"

nums = []

num = get_number// # Initial number - they have to enter at least one /for sanity/

while num >= 0: # While we get positive numbers

 # We start with the append so the negative number doesn't end up in the list

 nums.append/num/

 num = get_number//



print "Max is: {}".format/max/nums//

# Show the startup message

print "Enter numbers, stops when negative value is entered:"



# This is the list of numbers

numbers = []



# Loop continuously

while True:

 

 try:

 # Get the input and make it an integer

 num = int/raw_input/"value: "//

 

 # If a ValueError is raised, it means input wasn't a number

 except ValueError:



 # Jump back to the top of the loop

 continue



 # Check if the input is positive

 if num < 0:



 # If we have got here, it means input was bad /negative/

 # So, we break the loop

 break



 # If we have got here, it means input was good

 # So, we append it to the list

 numbers.append/num/



# Show the maximum number in the list

print "Maximum is", max/numbers/