1、輸入字符串，判斷是否為回文（例：abcdcba即為回文）

str = raw_input("請輸入一個字符串:")
step = len(str)/2

for i in range(0,step):
    if str[i] != str[-(i+1)]:
        print "不是回文"
        break
else:
    print "是回文"

2、有一分?jǐn)?shù)序列：2/1，3/2，5/3，8/5，13/8，21/13...求出這個數(shù)列的前20項之和

fenzi = 2
fenmu = 1
sum = 0
for i in range(1,21):
    fenzi,fenmu = fenzi+fenmu,fenzi     #分子和分母同時賦值，python語言特性，無需中間變量
    sum = sum + float(fenzi)/fenmu
print sum

3、有1、2、3、4個數(shù)字，能組成多少個互不相同且無重復(fù)數(shù)字的三位數(shù)？都是多少?

count = 0
for m in range(1,5):
    for n in  range(1,5):
        for k in  range(1,5):
            if m!=n and m!=k and n!=k:
                print str(m)+str(n)+str(k)
                count +=  1
print count

4、下劃線風(fēng)格轉(zhuǎn)駝峰風(fēng)格 （下劃線風(fēng)格：abc_def_ghi，駝峰風(fēng)格：AbcDefGhi）

data = raw_input("請輸入字符串：")
data = data.split('_')
word = []
for d in data:
    word.append(d.capitalize())
print ''.join(word)

5、寫一個腳本解析url
http://localhost:8080/test/data?abc=def&test=debug

6、列表元素去重

c = [1, 2, 3, 4, 5, 6,  3, 7, 8, 9, 5, 8]
r = []
for d in c:
    if d not in r:
        r.append(d)
print r

7、用字典表示學(xué)生與數(shù)學(xué)，語文，英語成績， 并計算平均分

dict = {
    "chinese":90,
    "math":78,
    "english":88,
}
print sum(dict.values())/len(dict)

8、打開文件，統(tǒng)計英文單詞出現(xiàn)的次數(shù)

file = open("this.txt")
lines = file.readlines()
file.close()
result = {}
for line in lines:
    data = line.strip(".\n").split(" ")      #.strip()去空格和換行
    for d in data:
        word = d.lower()
        if not word in result:
            result.setdefault(word,1)
        else:
            result[word] += 1
print result["is"]                  #輸出單詞is的出現(xiàn)次數(shù)

9、實現(xiàn)排序函數(shù)

data = [2, 4, 7, 9, 1, 6, 3, 5, 8]
def sort(data):
    for _ in range(len(data)):
        for d in range(0,len(data)-1):
            if data[d]>data[d+1]:
                data[d],data[d+1] = data[d+1],data[d]
    return data
print sort(data)

10、利用遞歸方法求n!

def jiec(x):
    if x==1:
        return 1
    return x * jiec(x-1)
print jiec(5)

11、輸入某年某月某日，判斷這一天是這一年的第幾天

year = int(raw_input("請輸入年份："))
month = int(raw_input("請輸入月份："))
day = int(raw_input("請輸入幾號："))
list = [31,28,31,30,31,30,31,31,30,31,30,31]
if (year%400==0) or (year%4==0 and year%100!=0) :
    list[1] = 29
    print sum(list[0:month-1]) + day
else:
   print sum(list[0:month-1]) + day

12、輸出9*9口訣表

from __future__ import print_function      #python2中無print函數(shù)無end屬性，需導(dǎo)包
for i in range(1,10):
    for j in range(1,i+1):
        print ("%d×%d=%d" % (j,i,i*j),end="  ")
    print ()                              #換行作用