Python基础教程：从入门到实战的快速指南

String cmd="cmd.exe ping ";
String ipprefix="192.168.10."; int begin=101; int end=200;
Process p=null; for(int i=begin;i<end;i++){
     p= Runtime.getRuntime().exec(cmd+i);
     String line = null;
     BufferedReader reader = new BufferedReader(new InputStreamReader(p.getInputStream()));
     while((line = reader.readLine()) != null)
     {
         //Handling line , may logs it.  }
    reader.close();
    p.destroy();
} 

 import subprocess
cmd="cmd.exe" begin=101 end=200  while begin<end:
    p=subprocess.Popen(cmd,shell=True,stdout=subprocess.PIPE,
                   stdin=subprocess.PIPE,
                   stderr=subprocess.PIPE)
    p.stdin.write("ping 192.168.1."+str(begin)+"\n")
    p.stdin.close()
    p.wait()
    print "execution result: %s"%p.stdout.read() 

print "Hello,world!"

print "Hello,world!"
raw_input("Press enter key to close this window! ");

print "欢迎来到奥运中国!" 
raw_input("Press enter key to close this window!");

# -*- coding: cp936 -*-
print "欢迎来到奥运中国!" 
raw_input("Press enter key to close this window! ");

# -*- coding: GBK -*-
print "欢迎来到奥运中国!" # 使用中文的例子 
raw_input("Press enter key to close this window");

a=100.0 
b=201.1 
c=2343 
print (a+b+c)/c 

print """ Usage: thingy [OPTIONS]
     -h                        Display this usage message
     -H hostname               Hostname to connect to """

word="abcdefg" a=word[2]
print "a is: "+a
b=word[1:3]
print "b is: "+b # index 1 and 2 elements of word.
c=word[:2]
print "c is: "+c # index 0 and 1 elements of word.
d=word[0:]
print "d is: "+d # All elements of word.
e=word[:2]+word[2:]
print "e is: "+e # All elements of word.
f=word[-1]
print "f is: "+f # The last elements of word.
g=word[-4:-2]
print "g is: "+g # index 3 and 4 elements of word.
h=word[-2:]
print "h is: "+h # The last two elements.
i=word[:-2]
print "i is: "+i # Everything except the last two characters
l=len(word)
print "Length of word is: "+ str(l)

print "Input your Chinese name:" s=raw_input("Press enter to be continued ");
print "Your name is  : " +s;
l=len(s)
print "Length of your Chinese name in asc codes is:"+str(l);
a=unicode(s,"GBK")
l=len(a)
print "I'm sorry we should use unicode char!Characters number of your Chinese \  name in unicode is:"+str(l);

word=['a','b','c','d','e','f','g']
a=word[2]
print "a is: "+a
b=word[1:3]
print "b is: " print b # index1 and 2 elements of word.
c=word[:2]
print "c is: " print c # index0 and 1 elements of word.
d=word[0:]
print "d is: " print d # All elements of word.
e=word[:2]+word[2:]
print "e is: " print e # All elements of word.
f=word[-1]
print "f is: " print f # The last elements of word.
g=word[-4:-2]
print "g is: " print g # index3 and 4 elements of word.
h=word[-2:]
print "h is: " print h # The last two elements.
i=word[:-2]
print "i is: " print i # Everything except the last two characters
l=len(word)
print "Length of word is: "+ str(l)
print "Adds new element[图片上传中...(image-b4ced-1616074265420-0)] " word.append('h')
print word

# Multi-way decision
x=int(raw_input("Please enter an integer:")) if x<0:
    x=0 print"Negative changed to zero" elif x==0:
    print "Zero"  else:
    print "More" # Loops List
a= ['cat', 'window', 'defenestrate'] for x ina:
    print x, len(x) 

# Define and invoke function.
def sum(a,b):
    return a+b
func = sum
r = func(5,6)
print r
# Defines function with default argument
def add(a,b=2):
    return a+b
r=add(1)
print r
r=add(1,5)
print r

# The range() function
a =range(5,10)
print a
a = range(-2,-7)
print a
a = range(-7,-2)
print a
a = range(-2,-11,-3) # The 3rd parameter stands for step
print a

spath="D:/download/baa.txt" f=open(spath,"w") # Opens file for writing.Creates this file doesn't exist.  f.write("First line 1.\n")
f.writelines("First line 2.")
f.close()
f=open(spath,"r") # Opens file forreading for line in f:
    print line
f.close()

s=raw_input("Input your age:") if s =="":
    raise Exception("Input must no be empty.") try:
    i=int(s)
except ValueError:
    print "Could not convert data to an integer." except:
    print"Unknown exception!"  else: # It is useful for code that must be executed if the try clause does not raise an exception
    print "You are %d" % i," years old"  finally: # Clean up action
    print "Goodbye!"

class Base:
    def __init__(self):
        self.data =[]
    def add(self, x):
        self.data.append(x)
    def addtwice(self, x):
        self.add(x)
        self.add(x)
# Child extends Base class Child(Base):
    def plus(self,a,b):
        return a+b
oChild =Child()
oChild.add("str1")
print oChild.data
print oChild.plus(2,3)

# a.py
def add_func(a,b):
    return a+b

# b.py
from a import add_func # Also can be : import a
print "Import add_func from module a" 
print"Result of 1 plus 2 is: " print add_func(1,2)    # If using "import a" , then here should be "a.add_func"

parent 
  --__init_.py
  --child
    -- __init_.py
    --a.py
b.py

import sys
print sys.path

import sys
sys.path.append('D:\\download')
from parent.child.a import add_func
print sys.path
print "Import add_func from module a" print"Result of 1 plus 2 is: " print add_func(1,2)