Python打印当前目录下的图片文件

源代码参考_Python_cookbook

代码如下：

import os, itertools
def anyTrue(predicate,sequence):
    return True in itertools.imap(predicate,sequence)

def endsWith(s,*endings):
    return anyTrue(s.endswith,endings)
'''
s.endswith 是一个方法，判断后缀名是否是在指定的endings里，如果是返回True
anyTrue(s.endswith,endings) 将这个方法传递给anyTrue，
itertools.imap(predicate,sequence) 就相当于filename.endswith(enddings)
返回结果为True就执行print filename
'''

for filename in os.listdir('.'):
    if endsWith(filename,'.jpg','.jpeg','.gif'):
        print filename

endswith判断文件后缀名是否在列表当中							str.endswith(suffix[, start[, end]])
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.


Example:

#!/usr/bin/python

str = "this is string example....wow!!!";

suffix = "wow!!!";
print str.endswith(suffix);
print str.endswith(suffix,20);

suffix = "is";
print str.endswith(suffix, 2, 4);
print str.endswith(suffix, 2, 6);
This will produce following result:

True
True
True
False