python推导式及函数练习

  

   

    

     

    
    

     

      from functools import reduce
     
    
   

    

     

    
    

     

      # 猴子吃桃
     
    
   

    

     

    
    

     

      sum=[reduce(lambda x,y:(x+1)*2,range(1,(13-j))) for j in range(2,12)]
     
    
   

    

     

    
    

     

      print(sum)
     
    
   

    

     

    
    

     

      # 素数
     
    
   

    

     

    
    

     

      su=[i for i in range(2,101) if 0 not in [i%j for j in range(2,i-1)]]
     
    
   

    

     

    
    

     

      print(su)
     
    
   

    

     

    
    

     

      prime=filter(lambda x: not [x%i for i in range(2,x) if x%i==0], range(2,101))
     
    
   

    

     

    
    

     

      print(list(prime))
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #用枚举对坐标和值拆分
     
    
   

    

     

    
    

     

      from enum import Enum
     
    
   

    

     

    
    

     

      for index in enumerate(y):
     
    
   

    

     

    
    

     
    print(index)
     
    
   

    

     

    
    

     

      a=[1,2]
     
    
   

    

     

    
    

     

      b=[4,3]
     
    
   

    

     

    
    

     

      for i,d1 in enumerate(a):
     
    
   

    

     

    
    

     
    for j,d2 in enumerate(b):
     
    
   

    

     

    
    

     
        if(i==j):
     
    
   

    

     

    
    

     
            print(d1,d2)
     
    
   

    

     

    
    

     

      for i in zip(a,b):
     
    
   

    

     

    
    

     
    print(i)
     
    
   

    

     

    
    

     

      # 对x转置
     
    
   

    

     

    
    

     

      x=[[1,2,3,4],[5,6,7,8],[9,10,11,12]]
     
    
   

    

     

    
    

     

      x1=[[i[w] for i in x] for w in range(len(x[0]))]
     
    
   

    

     

    
    

     

      print(x1)
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #求水仙花数
     
    
   

    

     

    
    

     

      sh=[i for i in range(100,1000) if i==sum(int(j)**3 for  j in str(i))]
     
    
   

    

     

    
    

     

      print(sh)
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #c排列计算
     
    
   

    

     

    
    

     

      def c(n,m):
     
    
   

    

     

    
    

     
    if(n==m):
     
    
   

    

     

    
    

     
        return 1
     
    
   

    

     

    
    

     
    else:
     
    
   

    

     

    
    

     
        def j(n):
     
    
   

    

     

    
    

     
            if (n == 1):
     
    
   

    

     

    
    

     
                return 1
     
    
   

    

     

    
    

     
            else:
     
    
   

    

     

    
    

     
                return n * j(n - 1)
     
    
   

    

     

    
    

     
    return j(n)/(j(m)*j(n-m))
     
    
   

    

     

    
    

     

      print(c(4,2))
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #打印杨辉三角
     
    
   

    

     

    
    

     

      def y(t):
     
    
   

    

     

    
    

     

          x1=[1]
     
    
   

    

     

    
    

     

          x2=[1,1]
     
    
   

    

     

    
    

     
    for i in range(t):
     
    
   

    

     

    
    

     
        if(i==0):
     
    
   

    

     

    
    

     
            print(x1)
     
    
   

    

     

    
    

     
        elif(i==1):
     
    
   

    

     

    
    

     
            print(x2)
     
    
   

    

     

    
    

     
        else:
     
    
   

    

     

    
    

     

                      x3=[]
     
    
   

    

     

    
    

     

                      x3.append(1)
     
    
   

    

     

    
    

     
                for j in range(1,i):
     
    
   

    

     

    
    

     

                          x3.append(x2[j]+x2[j-1])
     
    
   

    

     

    
    

     

                      x3.append(1)
     
    
   

    

     

    
    

     

                      x2=x3
     
    
   

    

     

    
    

     
                print(x3)
     
    
   

    

     

    
    

     

      y(9)
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #统计大小写字母的个数
     
    
   

    

     

    
    

     

      def str(*n):
     
    
   

    

     

    
    

     

          s,l=0,0
     
    
   

    

     

    
    

     
    for i in n:
     
    
   

    

     

    
    

     
        if(i.isupper()):
     
    
   

    

     

    
    

     

                  s+=1
     
    
   

    

     

    
    

     
        if(i.islower()):
     
    
   

    

     

    
    

     

                  l+=1
     
    
   

    

     

    
    

     
    return s,l
     
    
   

    

     

    
    

     

      x=("A","S","d","w","Q")
     
    
   

    

     

    
    

     

      print(str(*x))
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

      #逆序
     
    
   

    

     

    
    

     

      def resort(l,k):
     
    
   

    

     

    
    

     

          x=l[:k]
     
    
   

    

     

    
    

     

          x.reverse()
     
    
   

    

     

    
    

     

          y=l[k:]
     
    
   

    

     

    
    

     

          y.reverse()
     
    
   

    

     

    
    

     

          r=x+y
     
    
   

    

     

    
    

     
    return list(reversed(r))
     
    
   

    

     

    
    

     

      li=list(range(20))
     
    
   

    

     

    
    

     

      print(resort(li,5))
     
    
  
 

文章来源: blog.csdn.net，作者：一条coding，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/skylibiao/article/details/81777605