Python - 询问输入，从文件中提取数据

Question

我是python（2nd）day的新手，正在研究一个问题，要求我编写一个读取ASCII文件的程序（要求输入文件名），检查它是否存在具有多于 两个单词并在屏幕上打印文件的两个第一个单词。

它有点含糊，但我会假设文件是​​所有str，由空格分隔。

ex。

text1 text2 text text text 

到目前为止，我有：

name = (raw_input("Please enter the name of the file: ")) 
f=open(name) 
with codecs.open(name, encoding='utf-8') as f: 
    for line in f: 
     line = line.lstrip(BOM) 
words=line.split() 
print words 
if len(words) > 2: 
    print 'There are more than two words' 
    firsttow = words[:2] 
    print firstrow 

我有写else语句的问题，我想有，

if len(words) > 2: 
    print 'There are more than two words' 
    firsttow = words[:2] 
print firstrow 
else: 
if len(words) <2: 
     print 'There are under 2 words, no words will be shown' 

如何来加，是否有任何其他如何改善我的代码这个问题？ 我真的很感激帮助提前

感谢

*编辑：感谢所有帮助，最后的问题，我是当我运行.py文件，我希望能够看到之前的结果cmd窗口关闭。

添加：raw_input("Press return to close this window...")不起作用，它马上关闭。有任何想法吗？

EDIT2 *这是我当前的代码，仍然在努力之后

import codecs 
BOM = codecs.BOM_UTF8.decode('utf8') 
name = (raw_input("Please enter the name of the file: ")) 

with codecs.open(name, encoding='utf-8') as f: 
    words=[]   #define words here 
    for line in f: 
     line = line.lstrip(BOM) 
     words.extend(line.split())  #append words from each line to words 

if len(words) > 2: 
    print 'There are more than two words' 
    firstrow = words[:2] 
    print firstrow    #indentation problem here 
elif len(words) <2:     #use if 
    print 'There are under 2 words, no words will be shown' 

raw_input("Press return to close this window...") 

Answer 1

该代码在具有打开cmd窗口工作应该写成：

if len(words) > 2: 
    print 'There are more than two words' 
    firsttow = words[:2] 
    print firstrow 
elif len(words) <2: 
    print 'There are under 2 words, no words will be shown' 

注意压痕和使用elif（意思是“else if”）。

Answer 2

with codecs.open(name, encoding='utf-8') as f: 
    words=[]   #define words here 
    for line in f: 
     line = line.lstrip(BOM) 
     words.extend(line.split())  #append words from each line to words  

if len(words) > 2: 
    print 'There are more than two words' 
    firsttow = words[:2] 
    print firstrow    #indentation problem here 
if len(words) <2:     #use if 
    print 'There are under 2 words, no words will be shown'