语源科技BlogJava-≈佐

元组

≈佐 — Sat, 20 Jun 2009 16:36:00 GMT

# coding:gbk
# Filename:using_tuple.py

zoo = ('wolf','elephant','penguin') # 狼，象，企鹅
print 'Number of animals in the zoo is',len(zoo)

new_zoo = ('monkey','dolphin',zoo) # 海豚
print 'Number of animals in the new zoo is',len(new_zoo)
print 'All animals in new zoo are',new_zoo
print 'Animals brought from old zoo are',new_zoo[2]
print 'Last animal brought from old zoo is',new_zoo[2][2]

≈佐 2009-06-21 00:36 发表评论

使用列表

≈佐 — Fri, 19 Jun 2009 16:34:00 GMT

#Filename:using_list.py
#This is shopping list

shoplist = ['apple','mango','carrot','banana']

print 'I have',len(shoplist),'items to purchase.'

print 'These items are:',
for item in shoplist:
print item,

print '\nI also have to buy rice.'
shoplist.append('rice')
print 'My shopping list is now',shoplist

print 'I will sort mylist now'
shoplist.sort()
print 'sorted shopping list is',shoplist

print 'The first item I will buy is',shoplist[0]
olditem = shoplist[0]
del shoplist[0]
print'I bought the',olditem
print 'My shopping list is now',shoplist

≈佐 2009-06-20 00:34 发表评论

return 语句

≈佐 — Wed, 17 Jun 2009 16:38:00 GMT

# Filename:func_return.py

def maximum(x,y):
    if x>y:
        return x
    else:
        return y

print maximum(2,9)

≈佐 2009-06-18 00:38 发表评论

关键参数

≈佐 — Tue, 16 Jun 2009 16:40:00 GMT

# Filename:func_key.py

def func(a,b=5,c=10):
print 'a is',a,'and b is',b,'and c is',c

func(3,7)
func(25,c=24)
func(c=50,a=100)

≈佐 2009-06-17 00:40 发表评论

形参

≈佐 — Tue, 16 Jun 2009 16:35:00 GMT

# coding:gbk
# Filename:func_param.py

def printMax(a,b):
    if a>b:
        print a,'大于',b
    elif a<b:
        print b,'大于',a
    else:
        print '两数相等'

x=int(raw_input('输入第一个比较的数:'))
y=int(raw_input('输入第二个比较的数:'))
printMax(x,y)

≈佐 2009-06-17 00:35 发表评论

break语句

≈佐 — Tue, 16 Jun 2009 15:15:00 GMT

# Filename : break.py

while True:
    s=raw_input('Enter something :')
    if s=='quit':
        break
    print 'Length of the string is',len(s)
print 'Done'

≈佐 2009-06-16 23:15 发表评论

while的使用

≈佐 — Mon, 15 Jun 2009 16:44:00 GMT

# coding:gbk
# Filename : while.py

number = 23
running = True

while running:
    guess = int(raw_input('Enter an integer : '))

    if guess == number:
    print '恭喜，你输入的猜测数',guess,'和number相同。'
    running=False # 置为假，程序结束。
    elif guess < number:
    print '你输入的猜测数比number小。'
    else:
    print '你输入的猜测数比number大。'
else:
    print 'the while loop is over.'
print 'Done'

≈佐 2009-06-16 00:44 发表评论

使用if语句

≈佐 — Mon, 15 Jun 2009 16:25:00 GMT

# coding:gbk
# Filename : if.py

number = 23
guess = int(raw_input('Enter an integer : '))

if guess == number:
    print '相等的数'
elif guess < number:
    print '输入小'
else:
    print '输入大'
print 'Done'

≈佐 2009-06-16 00:25 发表评论

初探Python

≈佐 — Sun, 14 Jun 2009 15:55:00 GMT

昨晚装了虚拟机后，按照书中的程序一字不漏的输入，发现不可运行。
在XP中设置环境变量，只需添加python安装的目录路径即可。
后来发现原来是虚拟机的新版与旧版有较大的出入。我装的是3.0，书上的内容约为2.3
print 'xxx'
改成了
print('xxx')
即添加了括号才可

#Filename : var.py
i = 5
print (i)
i = i + 1
print (i)

s = '''This is a multi-line string.
This is the second line.'''
print (s)

≈佐 2009-06-14 23:55 发表评论

ReflectionTest

≈佐 — Wed, 14 Jan 2009 16:02:00 GMT

import java.util.*;
import java.lang.reflect.*;

public class ReflectionTest
{
    public static void main(String[] args)
    {
        String name;
        if(args.length > 0)
            name = args[0];
        else
        {
            Scanner in = new Scanner(System.in);
            System.out.println("Enter class name (e.g. java.util.Date): ");
            name = in.next();
        }

        try
        {
            Class cl = Class.forName(name);
            Class supercl = cl.getSuperclass();
            System.out.print("class " + name);
            if(supercl != null && supercl != Object.class)
                System.out.print(" extends " + supercl.getName());

            System.out.print("\n{\n");
            printConstructors(cl);
            System.out.println();
            printMethods(cl);
            System.out.println();
            printFields(cl);
            System.out.println("}");
        }
        catch(ClassNotFoundException e){ e.printStackTrace();}
        System.exit(0);
    }

    public static void printConstructors(Class cl)
    {
        Constructor[] constructors = cl.getDeclaredConstructors();

        for(Constructor c : constructors)
        {
            String name = c.getName();
            System.out.print("   " + Modifier.toString(c.getModifiers()));
            System.out.print(" " + name + "(");

            Class[] paramTypes = c.getParameterTypes();
            for(int j = 0;j < paramTypes.length;j++)
            {
                if(j > 0) System.out.print(", ");
                System.out.print(paramTypes[j].getName());
            }
            System.out.println(");");
        }
    }

    public static void printMethods(Class cl)
    {
        Method[] methods = cl.getDeclaredMethods();

        for(Method m : methods)
        {
            Class retType = m.getReturnType();
            String name = m.getName();

            System.out.print("   " + Modifier.toString(m.getModifiers()));
            System.out.print(" " + retType.getName() + " " + name + "(");

            Class[] paramTypes = m.getParameterTypes();
            for(int j = 0;j < paramTypes.length;j++)
            {
                if(j > 0) System.out.print(", ");
                System.out.print(paramTypes[j].getName());
            }
            System.out.println(");");
        }
    }

    public static void printFields(Class cl)
    {
        Field[] fields = cl.getDeclaredFields();

        for(Field f : fields)
        {
            Class type = f.getType();
            String name = f.getName();
            System.out.print("   " + Modifier.toString(f.getModifiers()));
            System.out.println(" " + type.getName() + " " + name + ";");
        }
    }
}

≈佐 2009-01-15 00:02 发表评论