python入门8 字符串拼接格式化输出

Posted 2021-01-17 dinghanhua

字符串拼接方式

   1  使用 + 拼接字符串

2  格式化输出：%s字符串 %d整数 %f浮点数 %%输出% %X-16进制 %r-原始字符串 

3 str.format()

 

代码如下：

#coding:utf-8
#/usr/bin/python
"""
2018-11-03
dinghanhua
字符串拼接，格式化输出
"""
import time

name = input(‘input name :‘) #输入姓名
age = int(input(‘input age:‘)) #输入年龄
nowtime = time.strftime(‘%Y%m%d %H:%M:%S‘,time.localtime()) #当前时间

‘‘‘使用 + 拼接字符串‘‘‘
#字符串连接
print(‘your name is  ‘+name+‘,
your are ‘+str(age)+‘ years old. 
time: ‘+nowtime)

‘‘‘
格式化输出
方式一： %s字符串 %d整数 %f浮点数 %%输出% %X-16进制 %r-原始字符串 
方式二： str.format()
‘‘‘

#格式化输出
print("""your name is  %s,
your are %d years old.
 time: %s"""%(name,age,nowtime))

‘‘‘浮点数制定输出2位小数； %%输出%‘‘‘
percent = 50.5
print(‘percent is %.2f%%‘ % percent) #制定浮点数的小数位

‘‘‘%X‘‘‘
x = 0xf00
print(‘16进制：0x%X‘ % x)

‘‘‘%s,%r的区别‘‘‘
print(‘str is %%s %s‘ % r‘c:userlocal‘)
print(‘str is %%r %r‘ % r‘c:userlocal‘)


# str.format()
str = """your name is  {0},
your are {1} years old.
 time: {2}"""
print(str.format(name,age,nowtime))

str2 = """your name is  {name},
your are {age} years old.
 time: {time1}"""
print(str2.format(name=name,age=age,time1=nowtime))

 

 

#coding:utf-8
#/usr/bin/python
"""
2018-11-03
dinghanhua
字符串拼接，格式化输出
"""
import time

name = input(‘input name :‘) #输入姓名
age = int(input(‘input age:‘)) #输入年龄
nowtime = time.strftime(‘%Y%m%d %H:%M:%S‘,time.localtime()) #当前时间

‘‘‘使用 + 拼接字符串‘‘‘
#字符串连接
print(‘your name is  ‘+name+‘,
your are ‘+str(age)+‘ years old. 
time: ‘+nowtime)

‘‘‘
格式化输出
方式一： %s字符串 %d整数 %f浮点数 %%输出% %X-16进制 %r-原始字符串 
方式二： str.format()
‘‘‘

#格式化输出
print("""your name is  %s,
your are %d years old.
 time: %s"""%(name,age,nowtime))

‘‘‘浮点数制定输出2位小数； %%输出%‘‘‘
percent = 50.5
print(‘percent is %.2f%%‘ % percent) #制定浮点数的小数位

‘‘‘%X‘‘‘
x = 0xf00
print(‘16进制：0x%X‘ % x)

‘‘‘%s,%r的区别‘‘‘
print(‘str is %%s %s‘ % r‘c:userlocal‘)
print(‘str is %%r %r‘ % r‘c:userlocal‘)


# str.format()
str = """your name is  {0},
your are {1} years old.
 time: {2}"""
print(str.format(name,age,nowtime))

str2 = """your name is  {name},
your are {age} years old.
 time: {time1}"""
print(str2.format(name=name,age=age,time1=nowtime))