Python基础（草稿）
#python ex1.py ## # -- coding:utf-8 -- print “Hello World!” print 6+2 print "aa","bb" print "%s %d %i "%(aa,bb,cc) print "%d"%10 print x print y $r False True string+string print aa,bb 逗号即空格 print "."*10 formater="%r %r %r %r" print formater%(1,2,3,4) %r everything \n 换行 """ xx yy xx yy """ #三个引号代表多行 获取用户输入 raw_input() raw_input("how old are you") pydoc raw_input 传参数 from sys import argv script,first,second,third=argv #脚本名字，变量1，2,3 a=open(filename) a.read() from sys import argv script,filename=argv file=open(filename) file.read() file.readline() file.truncate() file.seek(0) file.write("sss") file.close() from sys import argv from os.path import exists script,ffile,tfile=argv input=open(ffile) indata=input.read() len(indata) ##len exists(tfile) ##exists output.write(indata) output.close() input.close() def funt(a1,a2) print "%r %r"%(a1,a2) return 1 funt(1,2) string.split(' ') string.pop(0) if xx: print xx if xx: elif xx: else: xx the_count=[1,2,3,4,5] for nu in the_count: print nu for i in range(1,5) num=[] num.append(i) a=num[1] 字典 del from random import randint randint(0,5) class Employee(Person): def __init__(self,a,b): #######pip distribute nose virtualenv try: except : string.upper() string.lower() string.title() 首字母大写 string.strip() string.rstrip() string.lstrip() str(23) sss=[] sss.append() sss.insert(0,'aa') del sss[0] sss.pop() delete the last sss.pop(0) sss.remove('aa') sss.sort() sss.sort(reverse=True) 永久性排序 sorted(sss) 临时排序 sss.reverse() sss[-1] 最后一个元素 for a in sss: print(a) #缩进即关系 for a in range(1,7): print(a) sss=list(range(1,8)) sss=list(range(2,11,2)) min(sss) max(sss) sum(sss) sss[0:3] sss[0:] aaa=sss[:] sss=(111,2222) #不可更改 for i in range(1,5): if i<=3: print(i) else: print(i) aaa={1:333,2:3333} aaa[1] del for key,value in aaa.items(): for a in aaa.keys(): sorted(aaa.keys()) aaa.values() set(aaa.values()) 不重复的值 raw_input() int() 转成数字 break continue def gree() print def gree(arg1='aaa') print while aaa: print def gree(*arg) print from modulename import fun1,fun2,fun3 import pp as p p.fun2() from modulename import * ################################################################# class Dog(object): def __init__(self,name,age) def sit(self) class Dog(Cat): def __init__(self): super(Dog,self).__init__() from Dog import Dog from Dog import Dog,Cat import Dog as hh hh.cc() from Dog import * ###################################################################### with open('a.txt') as fi: fi.read() print readline() with open('a.txt','w') as fi: fi.write('aa\n') with open('a.txt','a') as fi: fi.write('aa') try: xx except xx: pass import json json.dump() json.load() #################################################################### aa.append aa.insert for a in aa: print(a) aa[0][1][3] isinstance(aa,list) ## for each_item in movies: if isinstance(each_item,list): for ne in each_item: print(ne) else: print(each_item) ## list() range enumerate int id next() ####### pypi ##### thefile=open('xx.txt') thefile.close() import os os.getcwd() os.chdir('') os.getcwd() data=open() data.seek(0) data.close() (a,b)=string.split(':') print(a) print(b) string.find(':') if string.find(':')==-1 xx try: except: pass file.open file.readline file.close file.find string.strip string.lstrip string.rstrip out=open('xx.txt','w') print("xxx",file=out) out.close() try: except: finally: try: with open('xx.txt','w') as data: print('sss',file=data) except: print('error') with 帮助关闭文件 sys.stdout sys.stdint ##################### ###二进制读写文件 import pickle with open('xx.pickle','wb') as aa: pickle.dump('xxx',aa) with open('xx.pickle','rb') as bb: ali=pickle.load(bb) locals() 返回当前作用域的变量集合 ################## data.sort() sorted(data) secs=[m*60 for m in mins] sanitize(t) 转时间格式 set() aa[0:3] class Aa(object): def __init__(self): class Nextlist(list): dict() 空字典 #######################################
