Question

有人可以帮助我，当我运行文件时出现此错误 ValueError：关闭文件的I / O操作。我只是想尝试运行一个simle测试文件一二三四五六七八九 10

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 '\n'
    line = line.rstrip('\n')
    print(line)
    line = infile.readline()
    # Update counter when line is read
    counter +=1  

# Close file
    infile.close()

# Call the main function.
main()

Answer 1

在Python中，缩进是语法的一部分 - 它表示代码块。

您的代码段清楚地显示infile.close()操作内部循环，因此它在第一次迭代时执行。因此，第二次从文件读取失败，因为文件在前一次迭代中已经关闭。

只需要修改行infile.close()即可修复。

或者，使用上下文管理器来允许Python管理资源清理。

with open(fileName, 'r') as infile:
    pass  # operate on file here

# file will be closed automatically when you leave code block above.

ValueError：关闭文件的I / O操作。

1 个答案: