python 学习笔记(1)
2016-01-14 18:30
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今天,学习了下python的语法,之前学习过java语法,所以比较学习了下:
首先,需要安装python工具,因为python2 与python3 内部发生较大变化,以前的工程开发都是应用python2开发,但是最新python3并不兼容2的,所以python3并不是很
流行,但是,python3一直努力区兼容python2,所以出黎一款兼容2,3 的版本,python2.7,建议下载该版本安装,及支持2里面某方法,也支持3.
接下来:直接打印hello world!
print("hello world") -------3
print "hello world" --------2
新建文件,命名为*.py,命名空间与java命名空间完全相同:
以一段代码总结今天工作(可能存在bug):
用户登录验证:
user = raw_input("input the login name:");
passWord = raw_input("input the login passWord:");
readUser = "";
readNum = 1;
a = open("a.txt");
value = a.read();
if len(value)>0:
b = value.split(" ");
readUser = b[0];
readNum = int(b[1]);
for j in range(3-readNum):
if readUser == user:
if readNum >=3:
print "%s has lock!" % readUser ;
else :
for i in range(3-readNum):
if(passWord!="admin"):
readNum = readNum + 1;
passWord = raw_input("input the login passWord:");
if readNum >3:
break;
else:
readNum = 0;
else:
readUser = user;
for i in range(3-readNum):
if(passWord!="admin"):
readNum = readNum + 1;
passWord = raw_input("input the login passWord:");
if readNum >3:
break;
else:
readNum = 0;
else:
print "%s has lock!" % readUser ;
b = open("a.txt","w");
b.write("%s %d" % (user,readNum));
b.close();
运行结果:
>>>
input the login name:admin
input the login passWord:admin1
input the login passWord:admin2
input the login passWord:admin3
admin has lock!
>>> ================================ RESTART ================================
>>>
input the login name:admin
input the login passWord:admin
admin has lock!
>>>
其中,raw_input(...) 交互输入
文件读写 b = open("a.txt","w");b.write("%s %d" % (user,readNum));b.close();
指定格式输出: "%s %d" % (user,readNum)
输出范围:>>> range(3) //[0, 1, 2]
首先,需要安装python工具,因为python2 与python3 内部发生较大变化,以前的工程开发都是应用python2开发,但是最新python3并不兼容2的,所以python3并不是很
流行,但是,python3一直努力区兼容python2,所以出黎一款兼容2,3 的版本,python2.7,建议下载该版本安装,及支持2里面某方法,也支持3.
接下来:直接打印hello world!
print("hello world") -------3
print "hello world" --------2
新建文件,命名为*.py,命名空间与java命名空间完全相同:
以一段代码总结今天工作(可能存在bug):
用户登录验证:
user = raw_input("input the login name:");
passWord = raw_input("input the login passWord:");
readUser = "";
readNum = 1;
a = open("a.txt");
value = a.read();
if len(value)>0:
b = value.split(" ");
readUser = b[0];
readNum = int(b[1]);
for j in range(3-readNum):
if readUser == user:
if readNum >=3:
print "%s has lock!" % readUser ;
else :
for i in range(3-readNum):
if(passWord!="admin"):
readNum = readNum + 1;
passWord = raw_input("input the login passWord:");
if readNum >3:
break;
else:
readNum = 0;
else:
readUser = user;
for i in range(3-readNum):
if(passWord!="admin"):
readNum = readNum + 1;
passWord = raw_input("input the login passWord:");
if readNum >3:
break;
else:
readNum = 0;
else:
print "%s has lock!" % readUser ;
b = open("a.txt","w");
b.write("%s %d" % (user,readNum));
b.close();
运行结果:
>>>
input the login name:admin
input the login passWord:admin1
input the login passWord:admin2
input the login passWord:admin3
admin has lock!
>>> ================================ RESTART ================================
>>>
input the login name:admin
input the login passWord:admin
admin has lock!
>>>
其中,raw_input(...) 交互输入
文件读写 b = open("a.txt","w");b.write("%s %d" % (user,readNum));b.close();
指定格式输出: "%s %d" % (user,readNum)
输出范围:>>> range(3) //[0, 1, 2]
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