标签：拼接 首字母 pytho style cccccc back getpass模块 time first
运行首个程序hello_world.py
#_*_coding:utf-8_*_ print("Hello world!")
输出结果：
Hello world!
变量
#_*_coding:utf-8_*_ name = "beyoungt"
#_*_coding:utf-8_*_ name = "beyoungt" print(name) name = “abby" print(name)
输出结果：
beyoungt
abby
在程序中可随时修改变量的值，python将始终记录变量的最新值。
字符串:
python中，用引号括起来的都是字符串。可以是单引号也可以是双引号。
"This is a string." ‘This is also a string.‘
使用方法修改字符串大小写：
name = "beyoungt" print(name.title())
输出：
Beyoungt
title():将每个单词首字母改为大写。
upper():将字符串全部改为大写。
lower():将字符串全部改为小写。
字符串的拼接：
first_name = "tian" last_name = "beyoungt" full_name = first_name + " " + last_name print("Hello," + full_name.title+" ! " )
输出：
Hello，Tian Beyoungt!
字符串的格式化输出:
name = “beyoungt" print("my name is %s" %name) #输出：my name is beyoungt
%s:字符串 %d:整数 %f:浮点数
name = input("name:") age = int(input("age:") ) #integer job = input("job:") salary = input("salary:") info = ‘‘‘ -------- info of %s ----- Name:%s Age:%d Job:%s Salary:%s ‘‘‘ % (name,name,age,job,salary) info2 = ‘‘‘ -------- info of {_name} ----- Name:{_name} Age:{_age} Job:{_job} Salary:{_salary} ‘‘‘.format(_name=name, _age=age, _job=job, _salary=salary) info3 = ‘‘‘ -------- info of {0} ----- Name:{0} Age:{1} Job:{2} Salary:{3} ‘‘‘.format(name,age,job,salary) print(info3)
添加制表符: \t
添加换行符: \n
print("Languages:\n\tPython\nC\n\tJavaScript") 输出： Languages: Python C JavaScript
删除空白:
favorite_language = " python " favorite_language.rstrip() #删除末尾空白 favorite_language.lstrip() #删除开头空白 favorite_language.strip() #删除两端空白
模块:
#！usr/bin/env python #-*- coding:utf-8-*- # Author burnywen import getpass _username = ‘burnywen‘ _password = ‘123456‘ username = input("username:") #password = getpass.getpass("password:") #fails to work well in pycharm; password = input("password:") if _username == username and _password == password: print("Welcome user {name} login...".format(name=username)) else: print("Invalid username or password!")
getpass模块使密码隐藏。
循环：
#！usr/bin/env python #-*- coding:utf-8-*- # Author burnywen count = 0 while True: print("count:",count) count +=1 if count == 100: break
#！usr/bin/env python #-*- coding:utf-8-*- # Author burnywen for i in range(0,10): if i <3: print("loop ",i) else : continue print("oh....")
#！usr/bin/env python #-*- coding:utf-8-*- # Author burnywen for i in range(10): print(‘----------‘,i) for j in range(10): print(j) if j >5: break
guess小游戏及改进:
#！usr/bin/env python
#-*- coding:utf-8-*-
# Author burnywen
age_of_burnywen = 23 for i in range(3): guess_age = int(input("guess age:") ) if guess_age == age_of_burnywen : print("congratulations, you are right. ") break elif guess_age > age_of_burnywen: print("think smaller...") else: print("think bigger...") else: print("you have tried too many times.")
#！usr/bin/env python #-*- coding:utf-8-*- # Author burnywen
age_of_burnywen = 23 count = 0 while count <3: guess_age = int(input("guess age:") ) if guess_age == age_of_burnywen : print("congratulations, you are ringht. ") break elif guess_age > age_of_burnywen: print("think smaller...") else: print("think bigger!") count +=1 else: print("you have tried too many times.")
#！usr/bin/env python #-*- coding:utf-8-*- # Author burnywen age_of_buruywen =23 count = 0 while count <3: guess_age = int(input("guess age:") ) if guess_age == age_of_burnywen : print("congratulations, you are right. ") break elif guess_age > age_of_burnywen: print("think smaller...") else: print("think bigger!") count +=1 if count == 3: countine_confirm = input("do you want to keep guessing..?") if countine_confirm != ‘n‘: count =0 else: print("you have tried too many times.")
标签：拼接 首字母 pytho style cccccc back getpass模块 time first
原文地址：http://www.cnblogs.com/beyount/p/7131297.html
