[带你飞]一小时带你学会Python

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: Python
-Java
-C++
"""

Usage: Python
-Java
-C++

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] // a is: c
print "a is: "+a
b=word[1:3]
print "b is: "
print b # index 1 and 2 elements of word. // ['b', 'c']
c=word[:2]
print "c is: "
print c # index 0 and 1 elements of word. // ['a', 'b']
d=word[0:]
print "d is: "
print d # All elements of word. // ['a', 'b', 'c', 'd', 'e', 'f', 'g']
e=word[:2]+word[2:]
print "e is: "
print e # All elements of word. // ['a', 'b', 'c', 'd', 'e', 'f', 'g']
f=word[-1]
print "f is: "
print f # The last elements of word. // g
g=word[-4:-2]
print "g is: "
print g # index 3 and 4 elements of word. // ['d', 'e']
h=word[-2:]
print "h is: "
print h # The last two elements. // ['f', 'g']
i=word[:-2]
print "i is: "
print i # Everything except the last two characters // ['a', 'b', 'c', 'd', 'e']
l=len(word)
print "Length of word is: "+ str(l) // 7
print "Adds new element..."
word.append('h')
print word // ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h']

# Multi-way decision
x=int(raw_input("Please enter an integer:"))
if x>0:
print "x>0"
elif x==0:
print "Zero"
else:
print "x<0"

x=
while (x<):
print 'x is:', x // 需要特别注意的是：这里一定要缩进，不然会编译不过
x+= print "end!"

words=['this','is','a','A']
for word in words:
print word

def hello(name):
return 'hello ' + name + '!' print hello('a')

>>> range(0, 8)
[0, 1, 2, 3, 4, 5, 6, 7]
>>> range(-5, -2)
[-5, -4, -3]
>>> range(-2, -5)
[]
>>> range(0, 6, 2)
[0, 2, 4]

def foo(i):
print 'the number is: ', i
i+=1
if i<10:
foo(i)
else:
print 'end!' foo(0)

>>>
the number is: 0
the number is: 1
the number is: 2
the number is: 3
the number is: 4
the number is: 5
the number is: 6
the number is: 7
the number is: 8
the number is: 9
end!

spath="F:/1.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() // 1.txt 会被写入上面两行 f=open(spath,"r") # Opens file for reading 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 ",s, "years old" print "Goodbye!"

_metaclass_ = type
class Person:
def setName(self, name):
self.name = name
def getName(self):
return self.name
def greet(self):
print "hello, world. i am %s." % self.name foo=Person()
bar=Person()
foo.setName('lucy')
bar.setName('lili') foo.greet()
bar.greet()

# -*- coding: utf-8 -*-
_metaclass_ = type
class Fruit:
def __init__(self, color):
self.color = color
print "fruit's color: %s" % self.color def grow(self):
print "grow..." class Apple(Fruit): #继承了父类
def __init__(self, color): #显示调用父类的__init__方法
Fruit.__init__(self, color)
print "apple's color: %s" % self.color class Banana(Fruit): #继承了父类
def __init__(self, color): #显示调用父类的__init__方法
Fruit.__init__(self, color)
print "banana's color:%s" % self.color def grow(self): #覆盖了父类的grow方法
print "banana grow..." if __name__ == "__main__":
apple = Apple("red")
apple.grow()
banana = Banana("yellow")
banana.grow()

>>>
fruit's color: red
apple's color: red
grow...
fruit's color: yellow
banana's color:yellow
banana grow...

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

# b.py
from a import add_func # Also can be : import aprint "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.pyb.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)