概念简答题

1、Python里面如何实现tuple和list的转换？
> list(a_tuple), tuple(a_list_)
请写出一段Python代码实现删除一个list里面的重复元素
> list(set(a_list))

#coding:utf-8
#!/usr/bin/python
# Filename: tuple2list.py

a_tuple = (1,2,5,5,6,7)
a_list =list(a_tuple)

print "a tuple:"
for j in a_tuple:
    print j,

print "na llst :"
for i in a_list:
    print i,

print "na set:"
a_list = list(set(a_list))
for i in a_list:
    print i,

a tuple:
1 2 5 5 6 7
a llst :
1 2 5 5 6 7
a set:
1 2 5 6 7

2、Python中pass语句的作用是什么？
> 空代码块, 占位置

3、介绍一下Python下range()函数的用法？

返回一个迭代器的list
> range(end)
> range(start, end)
> range(start, end, step)

#range会直接生成一个list对象   
alist=range(0,100)
for i in alist:
    if i==99:
        print i
4、什么是lambda函数？它有什么好处?
> 匿名函数, 方便, 类函数式, 写回调方便

5、如何用Python来进行查询和替换一个文本字符串？

字符串替换str.replace('old','new')

str4="how can you do it like that , fuck you"
if "you" in str4:
    newstr=str4.replace("you", "he")
print str4
print newstr

how can you do it like that , fuck you
how can he do it like that , fuck he

6、Python里面如何生成随机数？

import random
for i in range(0,10):
    print random.randint(1,100)