使用Python打印行号的问题(LPTHW Ex20)

时间:2014-02-08 09:58:24

标签: python

我是Python和编码的新手,我一直在努力通过Learn Python The Hard Way,刚刚完成了ex20,我完成了所有事情并且非常确定我理解了这一切,但出于某种原因,当我运行以下脚本时,我不这样做在结尾的行的开头得到数字1,2和3,但我没有得到任何错误。

这是我的代码:

from sys import argv

script, input_file = argv

def print_all(f):
    print f.read()

def rewind(f):
    f.seek(0)

def print_a_line(line_count, f):
    print line_count, f.readline(),

current_file = open(input_file)

print "First let's print the whole file:\n"
print # a blank line

print_all(current_file)

print "Now let's rewind, kind of like a tape."

rewind(current_file)

print "Let's print three lines:"

current_line = 1
print_a_line(current_line, current_file)

current_line += 1
print_a_line(current_line, current_file)

current_line += 1
print_a_line(current_line, current_file)

这就是您应该看到的内容:

$ python ex20.py test.txt
First let's print the whole file:

This is line 1
This is line 2
This is line 3

Now let's rewind, kind of like a tape.
Let's print three lines:
1 This is line 1

2 This is line 2

3 This is line 3

但这是我在Powershell中获得的

PS C:\Users\David\lpthw> python ex20.py test.txt

First let's print the whole file:


 ■t h i s   i s   a   l i n e   1

 t h i s   i s   a   l i n e   2

 t h i s   i s   a   l i n e   3


Now let's rewind, kind of like a tape.
Let's print three lines:

   ■t h i s   i s   a   l i n e   1

   t h i s   i s   a   l i n e   2

   t h i s   i s   a   l i n e   3

我一直在逐行扫描我的代码并且无法理解为什么我在最后3行的开头没有得到数字,也不知道为什么我在开始时有这些数据

1 个答案:

答案 0 :(得分:0)

如果您使用Notepad ++,我遇到了同样的问题。我尝试切换到记事本,当我以UTF-8保存时几乎解决了问题。最后,我尝试将其保存在ANSI编码中,结果非常完美。对于Notepad ++,当您编写文本文件时,只需转到顶部菜单栏并确保选择ANSI。

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