小编bra*_*adb的帖子

我试图找到两个不同集的笛卡尔积.我在网上找不到关于笛卡尔产品的任何内容,无论是列表还是字典.

功率设置也很混乱.

这些都不在我一直在使用的书中.

有没有一个人能指出我正确的方向.

我试图设置一个'help'的全局变量来显示我在代码中的函数.目标是用户在"帮助"一词中输入的任何时候我都可以显示我创建的表格.该函数称为table(),我想显示它.我的代码如下:

def table():
    header=(" Operation      Command-line Format")
    underline=("_________      ___________________")
    meat=("Union                   set1&set2 \n Intersection            set1|set2 \n Difference              set1-set2 \n Symmetric difference    set1 ^ set2 \n Cartesian product       set1 X set2 \n Subset                  set1<=set2 \n Proper subset           set1<set2 \n Super set               set1=>set2 \n Proper super set        set1>set2 \n Cardinality             card set1 \n Membership-in           xE set1      where x is single element\n Membership-not-in       x!Eset1      where x is single element\n Power set               power set1\n Display this table      help") 
    print(header, "\n",underline,"\n",meat) 




def intro():


    firstChoice=input("Would you like …

我正在尝试将我的字典写入文件,并且已经知道我必须将其更改为字符串.但是有没有办法在末尾添加'\n'以保持我的文件有条理？

代码如下:

def dictionary(grocerystock):

    with open('grocery_stock.txt','r+') as f:
        lines = f.readlines()

# filter out empty lines
    lines = [line for line in lines if line.strip() != '']

# split all lines
    lines = [line.split() for line in lines]

# convert to a dictionary
    grocerystock = dict((a, (b, c)) for a, b, c in lines)

# print
    for k, v in grocerystock.items():
        print (k, v)

    grocerystock=str(grocerystock)


    grocerystock=grocerystock.replace("{",'')
    grocerystock=grocerystock.replace("}",'')
    grocerystock=grocerystock.replace("(",'')
    grocerystock=grocerystock.replace(")",'')
    grocerystock=grocerystock.lstrip()
    grocerystock=grocerystock.rstrip()
    grocerystock=grocerystock.strip()
    grocerystock=grocerystock.replace(":",'')
    c=(grocerystock+("\n"))


    e=open('grocery_stock.txt', 'w+')

    e.write(c)
    e.close()

任何帮助将不胜感激.

我目前正在尝试编写一个程序,它是一个零重力的连接四游戏,这意味着你可以从棋盘的一个区域放置棋子,我正在努力选择一个柱子并从顶部放置我的棋子.此外,我的程序会询问用户他们希望在棋盘上放置多少块,这样会让游戏变得更难.在我输入例如C8时,它会查看每个列表中第8个元素的列表中的第8行.有什么想法吗？

我编辑的代码如下:

#this imports random for my blocks 
import random




#this makes my board
table = [[ "   ","C1", "C2", "C3", "C4", "C5", "C6", "C7", "C8", "C9", "C10"],
         [ " R1|", " |", " |", " |", " |", " |", " |", " |", " |", " |", " |"],
         [ " R2|", " |", " |", " |", " |", " |", " |", " |", " |", " |", " |"],
         [ " R3|", " |", " …