#!/usr/bin/python
#coding=utf-8
‘‘‘
总和=0
循环100次
{
总和 = 总和+当前循环数
}
打印总和
然后再把这个思路用代码写出来即可。
import math
for i in (1,100 + 1):
i = i
print i
def num():
num = 0
for i in range(1,101):
num = num + i
return num
print(num())
def sum():
sum = 0
for n in range(1,101):
sum = sum + n
return sum
print(sum())
‘‘‘
#for循环
#基本构造是：
#for 元素 in 序列:
# statement
for a in[3,4,5,6,‘a‘,‘b‘,‘who are you‘]:
print a
m = range(5)
print m
for a in range(10):
print a**a
#while循环
#while的用法是：
#while 条件:
# statement
i = 0
while i < 10:
print i
i = i + 1
print i
#中断循环
for i in range(10):
if i == 2:
continue#遇到continue, 那么跳过
print i
for i in range(10):
if i == 2:
break#触发break, 循环停止
print i
#函数
def square_sum(a,b):
c = a**2 + b**2
return c
print square_sum(-3,9)
a = 1
def change_integer(a):
a = a + 1
return a
print change_integer(a) #注意观察结果
print a #注意观察结果
#===(Python中 "#" 后面跟的内容是注释，不执行 )
b = [1,2,3]
def change_list(b):
b[0] = b[0] + 1
return b
print change_list(b) #注意观察结果
print b #注意观察结果
#面向对象的基本概念
#相近对象，归为类
class Bird(object):
have_feather = True
way_of_reproduction = ‘egg‘
summer = Bird()
print summer.have_feather
print summer.way_of_reproduction
#动作
class Bird(object):
have_feather = True
way_of_reproduction = ‘egg‘
def move(self, dx, dy,dz):
position = [0, 0, 0]
position[0] = position[0] + dx
position[1] = position[1] + dy
position[2] = position[2] + dz
return position
#子类
class Chicken(Bird):
way_of_move=‘walk‘
possible_in_KFC = True
class Oriole(Bird):
way_of_move = ‘fly‘
possible_in_KFC = False
summer = Bird()
summer = Chicken()
print summer.have_feather
print summer.move(5, 8, 9)
wind = Bird()
wind = Oriole()
print wind.have_feather
print wind.move(9, 9, 8)
class Human(object):
Definition = ‘Toolusing‘
way_of_move = ‘Bipedalism‘
class Child(Human):
way_of_move = ‘Bipedalism‘
class Adult(Human):
way_of_move = ‘Bipedalism‘
ability = ‘Toolusing‘
class Old(Human):
way_of_move = ‘Bipedalism‘
jhon = Child()
print jhon.Definition
print jhon.way_of_move
#面向对象的拓展
#调用类的其它信息
class Human(object):
laugh = ‘hahaha‘
def show_laugh(self):
print self.laugh
def laugh_100th(self):
for i in range(100):
self.show_laugh()
if i == 3:
return
jhon = Human()
jhon.laugh_100th()
#初始化
class happyBird(Bird):
def __init__(self,more_words):
print ‘We are happy birds.‘,more_words
summer = happyBird(‘Happy,Happy!‘)
#对象的性质
class Human(object):
def __init__(self, input_gender):
self.gender = input_gender
def printGender(self):
print self.gender
jhon = Human(‘male‘)
print jhon.gender
jhon.printGender()
class Human(object):
def __init__(self, input_gender):
self.gender = input_gender
def printGender(self):
print self.gender
li_lei = Human(‘male‘) # 这里，‘male‘作为参数传递给__init__()方法的input_gender变量。
print li_lei.gender #这一行结果与下一行对比
li_lei.printGender() #这一行结果与上一行对比
nl = [1.1, 2, 3, 4 ,5 ,5 , 55, 6, 7, 5]
print nl.count(5)
print nl.index(5)
nl.insert(0, 999)
nl.remove(55)
print nl.pop()
nl.sort()
nl.append(999)
print nl
class superList(list):
def __sub__(self, b):
a = self[:] # 这里，self是supeList的对象。由于superList继承于list，它可以利用和list[:]相同的引用方法来表示整个对象。
b = b[:]
while len(b) > 0:
element_b = b.pop()
if element_b in a:
a.remove(element_b)
return a
print superList([1,2,3,4]) - superList([3,4])
def Year(year):
year = int(year)
if (year % 4) == 0:
print ‘True‘
else:
print ‘False‘
return year
print Year(2008)
import datetime
date_ = raw_input(‘input three number like 2011 2 31:‘)
try:
year , month , day = date_.split()
print year , month , day
print datetime.date(int(year) , int(month) , int(day))
except Exception ,e:
print e
时间： 2024-10-24 17:46:11