1、請用代碼實現：利用下劃線將列表的每一個元素拼接成字符串，li = [‘alex‘,‘eric‘,‘rain‘]

#!/usr/bin/env python
# -*- coding:utf-8 -*-

li = [‘alex‘,‘eric‘,‘rain‘]
v = ‘_‘.join(li)
print(v)

2、查找列表中元素，移除每個元素的空格，並查找以 a 或 A 開頭 並且以 c 結尾的所有元素。
li = ["alec", " aric", "Alex", "Tony", "rain"]
tu = ("alec", " aric", "Alex", "Tony", "rain")
dic = {‘k1‘: "alex", ‘k2‘: ‘ aric‘,"k3": "Alex", "k4": "Tony"}

#!/usr/bin/env python
# -*- coding:utf-8 -*-

li = ["alec", " aric", "Alex", "Tony", "rain"]

for S in li:
S = S.strip()
prefix_a = S.startswith(‘a‘)
prefix_A = S.startswith(‘A‘)
suffix_c = S.endswith(‘c‘)
if prefix_a or prefix_A and suffix_c:
print(‘要查找的元素:%s‘ % S)

tu = ("alec", " aric", "Alex", "Tony", "rain")

for S in tu:
S = S.strip()
prefix_a = S.startswith(‘a‘)
prefix_A = S.startswith(‘A‘)
suffix_c = S.endswith(‘c‘)
if prefix_a or prefix_A and suffix_c:
print(‘要查找的元素:%s‘ % S)

dic = {‘k1‘: "alex", ‘k2‘: ‘ aric‘,"k3": "Alex", "k4": "Tony"}

for S in dic.values():
S = S.strip()
prefix_a = S.startswith(‘a‘)
prefix_A = S.startswith(‘A‘)
suffix_c = S.endswith(‘c‘)
if prefix_a or prefix_A and suffix_c:
print(‘要查找的元素:%s‘ % S)

http://www.cnblogs.com/lianzibing/p/6105287.html

Python練習題（基礎知識練習題（三））