关于python：ValueError：关闭文件的I / O操作。

ValueError: I/O operation on closed file.

有人能帮我一下吗？我运行文件时出错了值错误：对已关闭文件执行I/O操作。我只是想运行一个模拟测试文件一二三四五六七八九十

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31

def main():
# Declare variables
line = ''
counter = 0

# Prompt for file name
fileName = input('Enter the name of the file: ')

# Open the specified file for reading
infile = open(fileName, 'r')

# Priming read
line = infile.readline()
counter = 1

# Read in and display first five lines
while line != '' and counter <= 5:
# Strip '
'
line = line.rstrip('
')
print(line)
line = infile.readline()
# Update counter when line is read
counter +=1

# Close file
infile.close()

# Call the main function.
main()