'''
@Author: your name
@Date: 2020-07-23 23:13:36
@LastEditTime: 2020-07-23 23:35:12
@LastEditors: Please set LastEditors
@Description: In User Settings Edit
@FilePath: \vscode_py\day17.py
'''
# Question 65
# Please write assert statements to verify that every number in the list [2,4,6,8] is even.

def Q65():
    l=[2,4,6,8]
    for i in l:
        assert i%2==0,"{} is not even".format(i)
    print("end")

# Question 66
# Please write a program which accepts basic mathematic expression from console and print the evaluation result.

def Q66():
    expression=input("expression: ")
    ans=eval（expression)
    print(ans)


# Question 67
# Please write a binary search function which searches an item in a sorted list. The function should return the index of element to be searched in the list.

def Q67(li,element):
    import math
    low=0
    high=len(li)-1
    # print(high)

    while low<=high:
        mid=round((high+low)/2)
        # print(mid)
        if element>li[mid]:
            low=mid+1
        elif element<li[mid]:
            high=mid-1
        else:
            return mid
    return None

# 使用random.uniform(a,b)生成指定范围(a,b)的随机数
# Question 68
# Please generate a random float where the value is between 10 and 100 using Python module.
def Q68():
    import random
    print("random:{}".format(random.uniform(10,100)))

# Question 69
# Please generate a random float where the value is between 5 and 95 using Python module.
def Q69():
    import random
    # ans=random.random()*100-5
    ans=random.uniform(5,95)
    print("ans:{}".format(ans))



if __name__ == "__main__":
    # Q65()

    # Q66()

    # li=[2,4,6,8]
    # print(Q67(li,5))

    # Q68()

    Q69()