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 = beyoungtprint(name)
name = “abbyprint(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 = beyoungtprint(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 = tianlast_name = beyoungtfull_name = first_name + + last_nameprint(hello, + full_name.title+ ! )
输出：
hello，tian beyoungt!
字符串的格式化输出:
name = “beyoungtprint(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:) ) #integerjob = 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 burnywenimport 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 burnywencount = 0while true:print(count:,count)
count +=1if count == 100:break
#！usr/bin/env python#-*- coding:utf-8-*-# author burnywenfor i in range(0,10):if i <3:print("loop ",i)else :continueprint("oh....")
#！usr/bin/env python#-*- coding:utf-8-*-# author burnywenfor 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 = 23for i in range(3):
guess_age = int(input(guess age:) )if guess_age == age_of_burnywen :print(congratulations, you are right. )breakelif 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 = 23count = 0while count <3:
guess_age = int(input("guess age:") )if guess_age == age_of_burnywen :print("congratulations, you are ringht. ")breakelif guess_age > age_of_burnywen:print(think smaller...)else:print(think bigger!)
count +=1else:print(you have tried too many times.)
#！usr/bin/env python#-*- coding:utf-8-*-# author burnywenage_of_buruywen =23count = 0while count <3:
guess_age = int(input("guess age:") )if guess_age == age_of_burnywen :print("congratulations, you are right. ")breakelif guess_age > age_of_burnywen:print(think smaller...)else:print(think bigger!)
count +=1if count == 3:
countine_confirm = input(do you want to keep guessing..?)if countine_confirm != 'n':
count =0else:print(you have tried too many times.)
以上就是python基础学习详解的详细内容。