1、求出1 / 1 + 1 / 3 + 1 / 5……+1 / 99的和 (1分之一+1分之三+1分支5....)
from functools import reduce
def hs1():
a1 = 1
s1 = 0
while a1 < 100:
s1 += (1 / a1)
a1 += 2
print(s1)
def hs1_1():
x = 0
for i in range(1, 100, 2):
x += 1 / i
print(x)
hs1()
hs1_1()
2、用循环语句，计算2 - 10之间整数的循环相乘的值 （234*5....10)
def hs2():
s = 1
for i in range(2, 11):
s *= i
print(s)
hs2()
3、用for循环打印九九乘法表
def hs3():
for i in range(1, 10):
for j in range(1, 10):
print(f'{i}*{j}={i * j}', end='\n ')
hs3()
4、求每个字符串中字符出现的个数如：helloworld
def hs4():
a = input('请输入：')
b = set()
for i in a:
b.add((i, a.count(i)))
print(b)
hs4()
5、实现把字符串str = "duoceshi"中任意字母变为大写(通过输入语句来实现)
def hs5():
a = input('请输入：')
str = "duoceshi"
b=str
for i in a:
b = b.replace(i, i.upper())
print(b)
hs5()
6、分别打印100以内的所有偶数和奇数并存入不同的列表当中
def hs6():
s=list(range(101))
a=list(filter(lambda x: x % 2 ==0, s))
b=list(filter(lambda x: x % 2 ==1, s))
print(a)
print(b)
hs6()
7、请写一段Python代码实现删除一个list = [1, 3, 6, 9, 1, 8]
def hs7():
list = [1, 3, 6, 9, 1, 8]
a={}
print({}.fromkeys([list]))
8、将字符串类似："k:1|k3:2|k2:9" 处理成key:value或json格式,比如
def hs8():
str = "k:1|k3:2|k2:9"
a = (str.split('|'))
s = {}
for i in a:
k, v = i.split('😂
s[k] = v
print(s)
hs8()
9、把字符串user_controller转换为驼峰命名UserController大驼峰在java用作变量命名（前英文为大写后英文为小写） 小驼峰：作为变量命名
def hs9():
str = 'user_controller'
a = (str.title()).replace("_", "")
print(a)
hs9()
10、给一组无规律的数据从大到小或从小到大进行排序如：list = [2, 6, 9, 10, 18, 15, 1]
def hs10():
list = [2, 6, 9, 10, 18, 15, 1]
list.sort()
print(list)
list.reverse()
print(list)
hs10()
11、分析以下数字的规律， 1 1 2 3 5 8 13 21 34用Python语言编程实现输出
#分析题目：根据规律 1+1=2 2+1=3 2+3=5 3+5=8....
#此为斐波那契数列 （考试题非常多次题目）
def hs11():
n = int(input("请输入次数："))
a, b = 1, 1
s = list()
for i in range(n):
s.append(a)
a, b = b, a + b
print(s)
hs11()
def hs11_1(n):
n = int(input("请输入次数："))
s = [1, 1]
if n == 1:
print(s[0])
elif n == 2:
print(s[:])
else:
for i in range(n - 2):
s.append((s[-1] + s[-2]))
print(s)
hs11_1()
12、如有两个list:a =['a','b','c','d','e'] b =[1,2,3,4,5] 将a中的元素作为key b中的元素作为value，将a,b合并为字典
def hs12():
a = ['a', 'b', 'c', 'd', 'e']
b = [1, 2, 3, 4, 5]
s=dict(zip(a,b))
print(s)
hs12()
13、有如下列表，统计列表中的字符串出现的次数 a = ['apple','banana','apple','tomao','orange','apple','banana','watermeton']
def hs13():
a = ['apple', 'banana', 'apple', 'tomao', 'orange', 'apple', 'banana', 'watermeton']
b=dict()
for x in a:
b[x]=a.count(x)
print(b)
hs13()
14、、列表推导式求出列表所有奇数并构造新列表 a =[1,2,3,4,5,6,7,8,9,10]
def hs14():
a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
b=list(filter(lambda x: x % 2 ==1, a))
print(b)
hs14()
15、有如下url地址, 要求实现截取出"?"号后面的参数, 并将参数以"key value"的键值形式保存起来, 并最终通过#get(key)的方式取出对应的value值。
#url地址如下：http://ip:port/extername/get_account_trade_record.json?page_size=20&page_index=1&user_id=203317&trade_type=0"
def hs15():
a = 'http://ip:port/extername/get_account_trade_record.json?page_size=20&page_index=1&user_id=203317&trade_type=0"'
b = a[a.find("?") + 1:-1].split('&')
s = dict()
for i in b:
k, v =i.split('=')
s.setdefault(k, v)
print(s)
hs15()