##################################queue######################################### #!/usr/bin/env python 'use list as a queue' #define a void list as a void queue queue = [] #define in queue function def enQ(): queue.append(raw_input('Enter New String: ').strip()) #define out queue function def deQ(): #judge queue whether viod if len(queue) == 0: print('Can not pop from an empty queue!') else: print('Removed' ,queue.pop(0)) #define show queue function def viewQ(): print(queue) #define a dictionary to chose opration function cmds = {'e':enQ,'d':deQ,'v':viewQ} #define a funtion to show menu def showMenu(): pr = ''' (E)nqueue (D)equeue (V)iew (Q)uit Enter choice:''' #double while circle make program always run while True: while True: try: #use to print menu information and get valid choice number(no space, just one bit , lower) choice = raw_input(pr).strip()[0].lower() except(EOFError,KeyboardInterrupt,IndexError): #if get a invalid value,return 'q' choice = 'q' print('You picked: %s '% choice) if choice not in 'devq': print('Invalid option, try again!') else: break if choice == 'q': break #call functions by dictionary cmds[choice]() #main function if __name__ == '__main__': showMenu() ##################################stack###################################### #!/usr/bin/env python 'this program use list as a stack' stack = [] def pushit(): 'input stack ' stack.append(raw_input('Enter New Strings: ').strip()) def popit(): 'output stack' if len(stack) == 0: print('Can not pop from an empty stack!') else: print('removed [',stack.pop(),']') def viewStack(): print(stack) CMDs = {'u': pushit, 'o': popit, 'v': viewStack} def showMenu(): pr = ''' p(U)sh p(O)p (V)iew (Q)uit Enter Choice: ''' while True: while True: try: choice = raw_input(pr).strip()[0].lower() print(choice) except(EOFError.KeyboardInterrupt,IndexError): choice = 'q' print('you picked: %s ' % choice) if choice not in 'uovq': print('Invalid option, try again') else: break if choice == 'q': break CMDs[choice]() if __name__ == '__main__': showMenu()
另外有需要云服務器可以了解下創(chuàng)新互聯(lián)scvps.cn,海內外云服務器15元起步,三天無理由+7*72小時售后在線,公司持有idc許可證,提供“云服務器、裸金屬服務器、高防服務器、香港服務器、美國服務器、虛擬主機、免備案服務器”等云主機租用服務以及企業(yè)上云的綜合解決方案,具有“安全穩(wěn)定、簡單易用、服務可用性高、性價比高”等特點與優(yōu)勢,專為企業(yè)上云打造定制,能夠滿足用戶豐富、多元化的應用場景需求。
文章標題:python模擬隊列和堆棧(列表練習)-創(chuàng)新互聯(lián)
文章網(wǎng)址:http://vcdvsql.cn/article22/csscjc.html
成都網(wǎng)站建設公司_創(chuàng)新互聯(lián),為您提供移動網(wǎng)站建設、App開發(fā)、網(wǎng)站設計公司、定制網(wǎng)站、網(wǎng)站內鏈、全網(wǎng)營銷推廣
聲明:本網(wǎng)站發(fā)布的內容(圖片、視頻和文字)以用戶投稿、用戶轉載內容為主,如果涉及侵權請盡快告知,我們將會在第一時間刪除。文章觀點不代表本網(wǎng)站立場,如需處理請聯(lián)系客服。電話:028-86922220;郵箱:631063699@qq.com。內容未經(jīng)允許不得轉載,或轉載時需注明來源: 創(chuàng)新互聯(lián)