(1), 赋值: 创建变量引用值
a,b,c='aa','bb','cc'
(2), 调用: 执行函数
log.write('spam,name')
打印, 输出: 调用打印对象, print 语句 http://www.iplaypy.com/jichu/print.html
print ('abc')
(3)if,elif,else: 选择条件语句, if 语句 http://www.iplaypy.com/jinjie/if.html ,else 与 elif 语句 http://www.iplaypy.com/jinjie/else-elif.html
if ‘iplaypython‘ in text: print (text) |
(4) http://www.iplaypy.com/jinjie/for.html ,else: 序列迭代
for x in list: print x |
(5), http://www.iplaypy.com/jinjie/while.html ,else: 一般循环语句
while a > b : print ‘hello‘ |
(6),pass: 占位符 (空)
while True: pass |
(7), http://www.iplaypy.com/jinjie/break.html : 退出循环
while True: if exit: break |
(8), http://www.iplaypy.com/jinjie/continue.html : 跳过当前循环, 循环继续
while True: if skip: continue |
下面的语句是相对比较大的程序中会用到, 有关函数, 类, 异常以及模块, 同样只是简单介绍方法用途和格式.
(9),def: 定义函数 http://www.iplaypy.com/jichu/function.html 和方法
def info(a,b,c=3,*d): print (a+b+c+d[1]) |
(10),return: 函数返回值
def info(a,b,c=3,*d): return a+b+c+d[1] |
(11),python global http://www.iplaypy.com/jinjie/global.html : 命名空间, 作用域
x = ‘a‘ def function(): global x ; x = ‘b‘ |
(12),import: 访问, 导入模块
import http://www.iplaypy.com/module/sys.html
(13),from: 属性访问
from sys import stdin
(14),class: 创建对象, 类 class 定义方法 http://www.iplaypy.com/jichu/class.html
class Person: def setName(self,name): self.name = name def getName(self): return self.name def greet(self): print ‘hello,%s‘ % self.nameclass Person: def setName(self,name): self.name = name def getName(self): return self.name def greet(self): print ‘hello,%s‘ % self.names |
(15),try,except,finally:python 捕获异常 http://www.iplaypy.com/jichu/exception.html
try: action() except: print (‘action error‘) |
(16),raise: 触发异常
raise Endsearch (location)
(17),assert:python 断言 http://www.iplaypy.com/jinjie/assert.html , 检查调试
assert a>b ,'a roo small'
以上是为有基础的同学们做的方法概要, 对于 python 初学者, 可以点击语句查看具体操作方法介绍.
来源: http://www.bubuko.com/infodetail-2935020.html