Как считать числа из stdin в Windows?

C:\Program Files\Python3.2\Projects>hello.py  0<sum2.dat
Type integers, each followed by Enter; or just Enter to finish
Traceback (most recent call last):
  File "C:\Program Files\Python3.2\Projects\hello.py", line 7, in <module>
    line = input()
RuntimeError: input(): lost sys.stdin

print("Type integers, each followed by Enter; or just Enter to finish")
 
sum = 0
count = 0
 
while True:
    line = input()
    
    if line:
        try:
            number = int(line)
            sum += number
            count += 1
        except ValueError as err:
            print(err)
            continue
        except EOFError:
            break
            
 
    else:
        break
        
if sum:
    print("count =", count, ", sum =", sum, ", mean =",sum/count)

#!/usr/bin/env python3
 
while True:
    try:
        print('see', input())
    except EOFError:
        break

Type integers, each followed by Enter; or just Enter to finish
Traceback (most recent call last):
  File "C:\Program Files\Python3.2\Projects\hello.py", line 9, in <module>
    line = input()
RuntimeError: input(): lost sys.stdin

print("Type integers, each followed by Enter; or just Enter to finish")
 
sum = 0
count = 0
 
while True:
    # line = input()
    print('see', input())
    
    if line:
        try:
            number = int(line)
            sum += number
            count += 1
        except EOFError:
            break
        except ValueError as err:
            print(err)
            continue
    else:
        break
        
if sum:
    print("count =", count, ", sum =", sum, ", mean =",sum/count)

C:\Program Files\Python3.2\Projects>hello.py  0<sum2.dat
Type integers, each followed by Enter; or just Enter to finish
Traceback (most recent call last):
  File "C:\Program Files\Python3.2\Projects\hello.py", line 10, in <module>
    print('see', input())
RuntimeError: input(): lost sys.stdin

from sys import argv
 
script, file_name = argv
text_01 = open(file_name)
 
numbers = []
for num in text_01:
    num = int(num)
    numbers.append(num)
 
sum = 0
for i in numbers:
    sum = sum + i
 
text_01.close()
print("Numbers from file %s: %r, Count: %d." % (file_name, numbers, sum))

import sys
numbers = []
sum_numbers = 0
 
for line in sys.stdin:
    numbers.append(int(line))
    sum_numbers += int(line)
 
print(numbers)
print(sum_numbers)