Python打印當前目錄下的圖片文件

Python打印當前目錄下的圖片文件，源代碼參考_Python_cookbook
代碼如下： 

1. import os, itertools
   
2. def anyTrue(predicate,sequence):
   
3.     return True in itertools.imap(predicate,sequence)
   
4. 
   
5. def endsWith(s,*endings):
   
6.     return anyTrue(s.endswith,endings)
   
7. '''
   
8. s.endswith 是一個方法，判斷後綴名是否是在指定的endings裡，如果是返回True
   
9. anyTrue(s.endswith,endings) 將這個方法傳遞給anyTrue，
   
10. itertools.imap(predicate,sequence) 就相當於filename.endswith(enddings)
    
11. 返回結果為True就執行print filename
    
12. '''
    
13. 
    
14. for filename in os.listdir('.'):
    
15.     if endsWith(filename,'.jpg','.jpeg','.gif'):
    
16.         print filename

endswith判斷文件後綴名是否在列表當中 

1. str.endswith(suffix[, start[, end]])
   
2. Return True if the string ends with the specified suffix, otherwise return False. suffix can also be a tuple of suffixes to look for. With optional start, test beginning at that position. With optional end, stop comparing at that position.
   
3. 
   
4. 
   
5. Example:
   
6. 
   
7. #!/usr/bin/python
   
8. 
   
9. str = "this is string example....wow!!!";
   
10. 
    
11. suffix = "wow!!!";
    
12. print str.endswith(suffix);
    
13. print str.endswith(suffix,20);
    
14. 
    
15. suffix = "is";
    
16. print str.endswith(suffix, 2, 4);
    
17. print str.endswith(suffix, 2, 6);
    
18. This will produce following result:
    
19. 
    
20. True
    
21. True
    
22. True
    
23. False