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python list语法学习(带例子)

  • 时间:2022-08-22 23:17 编辑: 来源: 阅读:
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摘要:python list语法学习(带例子)
创建:list = [5,7,9] 取值和改值:list[1] = list[1] * 5 列表尾插入:list.append(4) 去掉第0个值并返回第0个值的数值:list.pop(0) 去掉第0个值但不返回数值:del(list[0]) 去掉具体某个值:list.remove(35) 函数function: 无参数:def function(): 一个参数:def function(x): 2个参数:def function(y): 任意个参数:def add_function(*args): [b]函数range: [/b]一个参数:range(n)  从第0位开始数n个位 两个参数:range(m,n) 从第m位开始到第n-1位,递增间隔为1 三个参数:range(m,n,i) 从第m位开始到第n-1位,递增间隔为i  for item in list:  和 for i in range(len(list)): 等价 对list中的元素用separator作为间隔输出: print separator.join(list) 如: list = ['a','b','c','d']   一般的print list会输出: ['a','b','c','d']。 而 print " ".join(list) 会输出:a b c d(必须是双的双引号,单的双引号不起作用) [b]接受键盘输入: [/b]guess_row = int(raw_input("Guess Row:")) 下面是一个自己写的小程序:生成一个方阵和随机的位置,叫玩家猜这个生成的位置是哪里
[u]复制代码[/u] 代码如下:
from random import randint def creat_board(length):     board = []     for i in range(length):         board.append(['O'] * length)     return board def print_board(x):     for row in x:         print " ".join(row) def random_row(board):     return randint(0, len(board) - 1) def random_col(board):     return randint(0,len(board[0]) - 1) length = int(raw_input("Enter board's length you:")) board = creat_board(length) print_board(board) turns = int(raw_input("Enter turns you want to play:")) for turn in range(turns):     ship_row = random_row(board)     ship_col = random_col(board)     print "This is " + str(turn + 1) + "th time to guess:"     guess_row = int(raw_input("Enter the row you guess:"))     guess_col = int(raw_input("Enter the col you guess:"))     if guess_row == ship_row and guess_col == ship_col:         print "You win!"         break     else:         if (guess_row < 0 or guess_row > len(board) - 1) or (guess_col < 0 or guess_col > len(board) - 1):             print "Incorrect input!"             if turn == turns - 1:                 print "Turns out!"         elif board[guess_row][guess_col] == 'X':             print "You have guessed it already!"             if turn == turns - 1:                 print "Turns out!"         else:             print "You guess wrong!"             board[guess_row][guess_col] = 'X'             print_board(board)             if turn == turns - 1:                 print "Turns out!"
曾经犯的错误: 1.创建board函数忘记返回一个board,所以它一直为空,导致后面的操作都越界了; 2.生成随机位置的时候,位置row和col的命名一直是跟生成的函数名一样(random_row=random_row(board)),导致TypeError: 'int' object is not callable错误。
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