在解析

Question

尝试创建一个打开现有文本文件的文件，并在该文件中查找行号。如果没有行号，我希望它打印出一条消息，表明它不在那里。 这就是我到目前为止所拥有的。我收到了意外的EOF错误消息。我在哪里错过了这个问题？

#    Get Input from user
file_name = input("Name of file to open please: ")
try:
    in_file=open(file_name)
    while True:
        find_line = input("Which line number are you looking for? ")
        try:
            line_num=int(find_line)
            line_count=1
            for line_num in in_file:
                if line_count== find_line:
                    print("Line number {} of the file {}, reads: {}".format(find_line,file_name,line_num))
                    break
                line_count+=1
            else:
                print("Line number {} in file {} seems to be missing".format(find_line,file_name))
                in_file.close()
                in_file.open(file_name)
                continue
            break
        except ValueError:
            print("The Line Number you entered",find_line,"is not a correct line number")
            in_file.close()
        except IOError:
            print ("Not sure how to break this to you, but the file your requested",file_str,"well, it's just not there")
    print ("end of program")

Answer 1

这是可以预料的。您的第一个 try块没有except块。

try:
   # Your code goes here
except:
   print("Error")