我修改了你的代碼，看看我是否可以讓它工作，但仍然看起來和你的一樣。這就是我提出的：

def main():

total = 0.0

length = 0.0

average = 0.0

try:

#Get the name of a file

filename = raw_input('Enter a file name: ')

#Open the file

infile = open(filename, 'r')

#Read values from file and compute average

for line in infile:

print line.rstrip("\n")

amount = float(line.rstrip("\n"))

total += amount

length = length + 1

average = total / length

#Close the file

infile.close()

#Print the amount of numbers in file and average

print 'There were', length, 'numbers in the file.'

print format(average, ',.2f')

except IOError:

print 'An error occurred trying to read the file.'

except ValueError:

print 'Non-numeric data found in the file'

except:

print('An error has occurred')

main()

總結

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