Python课后习题-第八章 读写文件

8.9.1 shelf 的删除-多重剪贴板

import shelve, pyperclip, sysmcbShelf = shelve.open('F:\\python\\mcb')if len(sys.argv) == 3 :    if sys.argv[1].lower() == 'save' :        mcbShelf[sys.argv[2]] = pyperclip.paste()        print(pyperclip.paste())    elif sys.argv[1].lower() == 'delete':        del mcbShelf[sys.argv[2]]                     #delete one item        print('delete1')elif len(sys.argv) == 2 :    if sys.argv[1].lower() == 'list' :        pyperclip.copy(str(list(mcbShelf.keys())))        print(str(list(mcbShelf.keys())))        print(str(list(mcbShelf.values())))    elif sys.argv[1] in mcbShelf:        pyperclip.copy(mcbShelf[sys.argv[1]])        print(mcbShelf[sys.argv[1]])    elif sys.argv[1].lower() == 'delete':        mcbShelf.clear()                              #delele all        print('delete2')mcbShelf.close()

8.9.2 疯狂填词

import rereadFile = open('F:\\python\\madlibs.txt')readContent = readFile.read()readFile.close()wordRegex = re.compile(r'ADJECTIVE|NOUN|ADVERB|VERB')#正则表达式print(readContent)searchResult = wordRegex.findall(readContent)inputResult=[]for i in searchResult :    if i == 'ADJECTIVE' :        print('Enter an adjective:')        inputResult.append(input())    if i == 'NOUN' :        print('Enter a noun:')        inputResult.append(input())    if i == 'ADVERB' :        print('Enter a verb:')        inputResult.append(input())    if i == 'VERB' :        print('Enter an adverb:')        inputResult.append(input())writeContent = wordRegex.sub('%s', readContent)#通配符插入writeFile = open('F:\\python\\madlibs_result.txt', 'w')writeFile.write(writeContent%(tuple(inputResult)))#通配符替换， tuple可以但是list不可以print(writeContent%(tuple(inputResult)))writeFile.close()

8.9.3  正则表达式查找 - 可以扩展 - grep

import os,sys,redef viewall(path):    path = os.path.abspath(path)    for i in os.listdir(path):              #listdir() return relpath only        file = os.path.join(path, i)        #join to get abspath        if os.path.isdir(file):            viewall(file)        elif os.path.basename(file).endswith('.txt'):            checkfile(file)def checkfile(file):    file = os.path.abspath(file)    fileContent = open(file).readlines()    for line in fileContent:        if regex.search(line, re.I) != None :            print(file + ':' + line)if len(sys.argv) != 3 :    print('wrong format')    sys.exit()    rootPath = sys.argv[1]regex = re.compile(sys.argv[2])if not os.path.exists(rootPath):    print('invalid path')    sys.exit()if os.path.isdir(rootPath):    viewall(rootPath)elif os.path.isfile(rootPath) and os.path.basename(rootPath).endswith('.txt'):    checkfile(rootPath)