python期末考试复习
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2022-06-10 22:29:37
期末考试复习 补修的python跟着大一一起学,考试肯定不会出难,于是就敲了一些代码,把他们放到博客上,来记录一下 代码都是一段一段的,且python代码不是很多,所以我都写到了一个文件里,作为练习 ......
期末考试复习
补修的python跟着大一一起学,考试肯定不会出难,于是就敲了一些代码,把他们放到博客上,来记录一下
代码都是一段一段的,且python代码不是很多,所以我都写到了一个文件里,作为练习
# python期末考试编程题 # 往文件写东西 # fp = open(r'file/test.txt','a+') # print('hellow',file=fp) # fp.close() # x = list(range(500)) # print(x) # for item in x: # t = 5**5 # print(item) # 优化上面代码 # x = list(range(100)) # t = 5**5 # for item in x: # print(item) # print(t) # 生成随机数对偶数下标并降序排列,奇数下标不变 # import random # x = [random.randint(0,100) for i in range(20)] # print(x) # y = x[::2] # print(y) # y.sort(reverse=true) # x[::2]=y # print(x) # def join(list,sep=none): # return (sep or ',').join(list) # print(join(['1','b','c'])) # 1,b,c # print(join(['1','b','c'],':')) # 1:b:c # def sum(a,b=3,c=5): # return sum([a,b,c]) # print(sum(a=8,c=2)) # print(sum(8)) # print(sum(8,2)) # # 13 # # 16 # # 15 # def sum(*p): # return sum(p) # print(sum(3,5,8)) # print(sum(8)) # print(sum(8,2,10)) # # 16 # # 8 # # 20 # # 编写函数判断奇偶数 # import math # def isprime(v): # n = int(math.sqrt(v)+1) # for i in range(2,n): # if v%i==0: # return 'no' # else: # return 'yes' # print(isprime(21)) # # 模拟内置sorted函数 # def sorted(v): # t=v[::] # r=[] # while t: # tt = min(t) # r.append(tt) # t.remove(tt) # return r # a = ['1','2','3','4','5','6','1','2','3','6','5'] # print(sorted(a)) # # 生成10个随机数,对前十个升序,对后十个降序 # import random # x = [random.randint(0,100) for i in range(20)] # print(x) # y=x[0:10] # y.sort() #原地排序 # x[0:10]=y # y=x[10:20] # y.sort(reverse=true) # x[10:20]=y # print(x) # # #判断是否为闰年 # x=input('please input an integer of 4 digit meaning the year:') # x=eval(x) # print(x) # if x%400==0 or (x%4 ==0 and not x%100==0): # print('yes') # else: # print('no') # # 计算分段函数 # x = input('please input x:') # x = eval(x) # if x<0 or x>=20: # print(0) # elif 0<=x<=5: # print(x) # elif 5<=x<10: # print(3*x-5) # elif 10<=x<20: # print(0.5*x-2) # # 下列程序不能运行,因为是只读属性 # class test: # def _init_(self,value): # self._value=value # @property # def value(self): # return self._value # t = test(3) # t.value = 5 # print(t.value) # # 统计数字出现频率 # import random # x = [random.randint(1,20) for i in range(50)] # #print(x) # r = dict() # #print(r) # for i in x: # r[i] = r.get(i,0)+1 # #print(r) # for k,v in r.items(): # print(k,v) # # 程序文件名 # def main(): # if __name__=='__main__': # print(1) # else: # print(2) # main() # a=[1,2,3,4] # print(a) # print(a[-4]) # x= [111,2,33] # x=sorted([111,2,33]) # key = lambda x: -len(str(x)) # print(key) # print(max([1111,2,222])) # print((3,)) # print({1,2,}) # print([1,2,]) # print([i for i in range(100)if i%13 == 0]) # x=[1,3,5,7,1,2] # x[len(x)+2:]=[1,2] # print(x) # def expend_list(list,num): # if len(list)>num: # return # for i in range(1,): print(132+321) print('132'+'321')