学步园

#列表解析(本质就是迭代)<br /> List = [1, 3, 5]<br /> L = [x*2 for x in List]<br /> print(L)<br /> #读取文件内容<br /> for line in open("wy.txt"):<br /> print(line)<br /> #输出结果<br /> ''' wang<br /> yang<br /> good<br /> luck'''<br /> #函数rstrip移除字符串右边的空白符<br /> file = open("wy.txt")<br /> lines = file.readlines()<br /> result = [line.rstrip() for line in lines]<br /> for text in result:<br /> print(text)<br /> #输出结果为<br /> ''' wang<br /> yang<br /> good<br /> luck<br /> '''<br /> #扩展列表解析<br /> specialLine = [line.rstrip() for line in open("wy.txt") if line[0] == 'w']#if会对每读取出的一行line进行判断。<br /> print(specialLine)<br /> res = [x+y for x in "abc" for y in "123"] #两个字符串的排列组合<br /> print(res)<br /> '''结果为：['a1', 'a2', 'a3', 'b1', 'b2', 'b3', 'c1', 'c2', 'c3']'''<br /> #等价代码<br /> res1 = []<br /> for x in "abc":<br /> for y in "123":<br /> res1.append(x+y)<br /> print(res1)<br /> '''结果为：['a1', 'a2', 'a3', 'b1', 'b2', 'b3', 'c1', 'c2', 'c3']'''</p> <p>inputStr = input("please input s string:")<br /> charRes = [ord(c) for c in inputStr]<br /> print(charRes)<br /> sum = 0<br /> for c in inputStr:<br /> sum += ord(c)<br /> print("The sum of all characters is %d" % sum)<br /> def GetAscii(string):<br /> '''<br /> Get the list of every character in string<br /> '''<br /> L = [ord(c) for c in inputStr]<br /> return L<br /> print(GetAscii(inputStr))<br /> print(map(ord, inputStr))</p> <p>phonebook = {"wang":1233, "zhang":56566, "li":37756, "xu":44455}<br /> allKeys = phonebook.keys();<br /> sorted(allKeys)<br /> for key in allKeys:<br /> print("%s %s" % (key, phonebook[key]))<br />