python技巧总结--持续更新

1.获取某一文件夹下所有文件路径

    file_path = []

    path = r""

    for parent,dirnames,filenames in os.walk(path):

    for filename in filenames:

        #print "the full name the file is" + os.path.join(parent,filename)

        file_path.append(os.path.join(parent,filename))

2.字符串是否以特定字符结尾

str1.endswith("str2")

3.list comprehension

l2 = [i.split(".php")[0] for i in l1 if i.endswith(".php")]

4.dict返回值

dict.setdefault('key', 'b') 

如果字典中"key"存在返回所对应的value,若不存在返回"b"