python作业9
陈皓:没写完~
苗子瑾:第五个没写完陈皓:第六个陈皓:一遇到数学就蒙苗子瑾:想想就头疼苗子瑾:等我回宿舍交作业吧……周愉:看见那个绿色的灯了么周愉:全灭了我就到家了陈皓:我家网络出门题了陈皓:刚给联通打完电话,效率问题~陈皓:效率问题苗子瑾:这个图打不开苗子瑾:这个图1.有以上文件record.txt,将此文件三人对话每个人的内容单独保存一个文件,并每个文件中不包含对话人名
def threem(): with open('record.txt', encoding='utf-8') as rf: while True: data = rf.readline() if data == '': break for i in data: if i == ':': if data[0:data.index(i)] == '陈皓': with open('w1', mode='a+', encoding='utf-8') as wf: wf.write(data[data.index(i)+1:]) elif data[0:data.index(i)] == '苗子瑾': with open('w2', mode='a+', encoding='utf-8') as wf: wf.write(data[data.index(i)+1:]) elif data[0:data.index(i)] == '周愉': with open('w3', mode='a+', encoding='utf-8') as wf: wf.write(data[data.index(i)+1:]) else: pass threem()
2.读入用户输入的文件的路径和一个字符串和行数,将文件中的第n行行首插入用户输入的字符串
def mdir(): s = input('请输入文件名:') n = int(input('请输入行数:')) s1 = input('请输入字符串:') with open(s, mode= 'r+', encoding='utf - 8') as fd: fd.seek(0, 0) for i in range(n - 1): fd.readline() a = fd.tell() text1 = fd.readlines() text1 = ''.join(text1) print(text1) fd.seek(a) fd.write(s1) fd.seek(0, 1) fd.write(text1) mdir()
3.下面只有一种方式不能打开文件,请尝试,并说明原因?
01. f = open('E:/test.txt', 'w')
02. f = open('E:\test.txt', 'w')
03. f = open('E://test.txt', 'w')
04. f = open('E:\\test.txt', 'w')
一个反斜杠对于python中有转义符的作用,比如\t,\n,所以报错,双反斜杠就是解决这个问题,或者在路径前加上’r’避免这种问题
4.打开一个文件使用open()函数的时候,通过设置文件的打开方式,决定打开的文件具有哪些性质,请总结都有哪些方式,并说明区别
r只读,r+读写,不创建
w新建只写,w+新建读写,二者都会将文件内容清零
(以w方式打开,不能读出。w+可读写)
w+与r+区别:
r+:可读可写,若文件不存在,报错;w+: 可读可写,若文件不存在,创建
以a,a+的方式打开文件,附加方式打开
a:附加写方式打开,不可读;a+: 附加读写方式打开
b是二进制文件,r+b就是以二进制读写模式打开
5.如何将一个文件对象f中的数据存放到列表中
with open('f', encoding='utf-8') as rf: data = [rf.readlines()] print(data)
6.如果得到文件对象f的每一行数据,尝试使用多种方法
n = int(input('请输入第几行:')) with open('f') as fd: fd.seek(0, 0) s = fd.readlines() print(s[n-1])
附加:发牌
from tkinter import * from PIL import Image, ImageTk import random import time root = Tk() root.geometry('1400x1000') root.title('xxxx') root.resizable(0, 0) class Card(object): def __init__(self, card=[]): self.card = card def createCard(self): s = '.jpg' for i in range(1,53): s1 = str(i) self.card += [''.join((s1,s))] def randomCard(self): random.shuffle(self.card) def deal(self, play): n = 0 m = 0 for i in range(52): play.player[m].card.append(self.card[i]) n += 1 if n == 13: n = 0 print(play.player[m].card) print(id(play.player[m])) print(id(play.player[m].card)) m += 1 class Player(object): def __init__(self, card=[]): self.card = card def players(self, player=[]): self.player = ['高进','刀仔','阿星','达叔'] for i in range(4): self.player[i] = Player() self.player[i].card = [] def start(): if v.get() == '发牌': v.set('重新发牌') card = Card() card.createCard() card.randomCard() play = Player() play.players() card.deal(play) n = 0 m = 0 t = 0 img = [] photo = [] imglabe = [] for i in range(0, 52): t += 50 img += ['x'] photo += ['y'] imglabe += ['z'] img[i] = Image.open(play.player[n].card[m]) photo[i] = ImageTk.PhotoImage(img[i]) imglabe[i] = Label(root, image=photo[i]) time.sleep(0.2) if n == 0: imglabe[i].place(x=250 + t, y=50) elif n == 1: imglabe[i].place(x=250 + t, y=750) elif n == 2: imglabe[i].place(x=100, y=50 + t) elif n == 3: imglabe[i].place(x=1100, y=50 + t) else: pass imglabe[i].update() m += 1 if m ==13: n += 1 m = 0 t = 0 root.mainloop() btn1 = Button(root, height=2, width=20, font=20) btn1.place(x=600, y=450) btn1['command'] = start v = StringVar() v.set('发牌') btn1['textvariable'] = v root.mainloop()
8.阅读下面的代码,它的输出结果是什么?
class A(object):
def go(self):
print "go A go!"
def stop(self):
print "stop A stop!"
def pause(self):
raise Exception("Not Implemented")
class B(A):
def go(self):
super(B, self).go()
print "go B go!"
class C(A):
def go(self):
super(C, self).go()
print "go C go!"
def stop(self):
super(C, self).stop()
print "stop C stop!"
class D(B,C):
def go(self):
super(D, self).go()
print "go D go!"
def stop(self):
super(D, self).stop()
print "stop D stop!"
def pause(self):
print "wait D wait!"
class E(B,C): pass
a = A()
b = B()
c = C()
d = D()
e = E()
# 说明下列代码的输出结果
a.go()
b.go()
c.go()
d.go()
e.go()
a.stop()
b.stop()
c.stop()
d.stop()
e.stop()
a.pause()
b.pause()
c.pause()
d.pause()
e.pause()
#go A go! #go A go! #go B go! #go A go! #go C go! #go A go! #go C go! #go B go! #go D go! #go A go! #go C go! #go B go! #stop A stop! #stop A stop! #stop A stop! #stop C stop! #stop A stop! #stop C stop! #stop D stop! #stop A stop! #stop C stop! #异常 #异常 #异常 #wait D wait! #异常
坦克
某次战役中,为便于信息交互,我军侦察部门将此次战役的关键高地坐标设定为(x=0,y=0)并规定,每向东增加100米,x加1,每向北增加100米,y加1。同时,我军情报部门也破译了敌军向坦克发送的指挥信号,其中有三种信号(L,R,M)用于控制坦克的运动,L 和 R 分别表示使令坦克向左、向右转向,M 表示令坦克直线开进100米,其它信号如T用于时间同步,P用于位置较准。
一日,我军侦察兵发现了敌军的一辆坦克,侦察兵立即将坦克所在坐标(P, Q)及坦克前进方向(W:西,E:东,N:北,S:南)发送给指挥部,同时启动信号接收器,将坦克接收到的信号实时同步发往指挥部,指挥部根据这些信息得以实时掌控了该坦克的位置,并使用榴弹炮精准地击毁了该坦克。
请设计合理的数据结构和算法,根据坦克接收到的信号,推断出坦克所在的位置。
设计时请考虑可能的扩展情况,并体现出您的设计风格。
假设,侦察兵发送给指挥部的信息如下:
坦克坐标:(11,39)
坦克运行方向:W
坦克接收到的信号为:MTMPRPMTMLMRPRMTPLMMTLMRRMP
其位置应该是(9,43),运动方向为E
class Tank(object): def __init__(self, xlobal, ylobal, direction): self.xlobal = xlobal self.ylobal = ylobal self.direction = direction def count(self, signal): for i in signal: if i == 'T' or i == 'P': pass elif i == 'M' and self.direction == 'W': self.xlobal -= 1 elif i == 'M' and self.direction == 'E': self.xlobal += 1 elif i == 'M' and self.direction == 'N': self.ylobal += 1 elif i == 'M' and self.direction == 'S': self.ylobal -+ 1 elif i == 'L' and self.direction == 'W': self.direction = 'S' elif i == 'L' and self.direction == 'S': self.direction = 'E' elif i == 'L' and self.direction == 'E': self.direction = 'N' elif i == 'L' and self.direction == 'N': self.direction = 'W' elif i == 'R' and self.direction == 'W': self.direction = 'N' elif i == 'R' and self.direction == 'N': self.direction = 'E' elif i == 'R' and self.direction == 'E': self.direction = 'S' elif i == 'R' and self.direction == 'S': self.direction = 'W' else: pass def res(self): print('目标位置为({},{}),运动方向为{}'.format(self.xlobal, self.ylobal, self.direction)) t1 = Tank(11,39,'W') t1.count('MTMPRPMTMLMRPRMTPLMMTLMRRMP') t1.res()

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