Python - 詢問輸入，從文件中提取數據

Question

我是python（2nd）day的新手，正在研究一個問題，要求我編寫一個讀取ASCII文件的程序（要求輸入文件名），檢查它是否存在具有多於 兩個單詞並在屏幕上打印文件的兩個第一個單詞。

它有點含糊，但我會假設文件是​​所有str，由空格分隔。

ex。

text1 text2 text text text 

到目前爲止，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 

我有寫else語句的問題，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' 

如何來加，是否有任何其他如何改善我的代碼這個問題？ 我真的很感激幫助提前

感謝

*編輯：感謝所有幫助，最後的問題，我是當我運行.py文件，我希望能夠看到之前的結果cmd窗口關閉。

添加：raw_input("Press return to close this window...")不起作用，它馬上關閉。有任何想法嗎？

EDIT2 *這是我當前的代碼，仍然在努力之後

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

該代碼在具有打開cmd窗口工作應該寫成：

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' 

注意壓痕和使用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'