"""
name = raw_input("Username")
pwd = raw_input("PassWord")
if name == "alex"and pwd == "123":
print('yes')
else:
print('no')
"""
inp = raw_input(">>>")
if inp == "1":
print('111')
elif inp == "2":
print('222')
elif inp =="3":
print('333')
else:
print('...')
if name == "alex" or name == "eric":
只要满足任何一个or的条件,进入当前代码块
1.
if 条件:
代码块
else:
代码块
2.
peif 条件:
代码块
else:
代码块
else:
代码块
3/条件:
True False
1 > 2 n1 > n2 n1 == n2
name == "alex" or name == "eric"
name != "alex"
name == "alex" and pwd == "123"
"""
import time
n1 = True
while n1:
print('1')
time.sleep(1)
n1 = False
print('end')
"""
"""
import time
kaishi = 1
flag = True
while flag:
print(kaishi)
if kaishi == 10:
flag = False
kaishi = kaishi + 1
time.sleep(1)
print('end')
kaishi = 1
while True:
print(kaishi)
if kaishi == 10:
break
kaishi = kaishi + 1
#使用while循环输入1-10除7以外(break用于跳出所有循环,并且breake后面的代码不再执行
continue用于跳出本次循环,继续下次循环)"""
start = 1
while True:
if start == 7:
start += 1
continue
print(start)
if start == 10:
break
start += 1
# _*_ coding:utf-8 _*_
temp = "张强"# utf-8
#解码,需要指定原来是什么编码
temp_unicode = temp.decode('utf-8')
#编码,需要指定要编成什么编码
temp_gbk = temp_unicode.encode("gbk")
print(temp_gbk)
算数
+ - * / %(取余) //(整除)
py2: 9/2=4
9/2=4.5(导入模块)
py3: 9/2=4.5
PYCHARM
1、模板
file=>settings=>Editor=>file and code templete=> python script=>
# usr/bin/env python
# _*_ coding:utf-8 _
from __future__ import division
val = 9/2
print (val)
2、文字大小
file => settings=>editor=>color and front=>save as..=>zitidaxiao
3、运行
a.点击要运行的文件,右键run
b.
view=>toolbar
选中要执行的文件
点击运行
c.在当前文件空白处,右键,run
4.切换py版本
file=>settings=>