python中join函数用法

str.join(list/tuple/dict/string)

str = "-";
seq = ("a", "b", "c"); # 字符串序列
print(str.join( seq ));
#结果：a-b-c

list=[\'1\',\'2\',\'3\',\'4\',\'5\']
print(\'\'.join(list))

　　#结果：12345

seq = {\'hello\':\'nihao\',\'good\':2,\'boy\':3,\'doiido\':4}
print(\'-\'.join(seq))        #字典只对键进行连接

#结果：hello-good-boy-doiido