py-day2-5 python 百分号字符串拼接

#### 字符串格式化。
# %s 代替任何的元素 （数字，字符串，列表··）
print('I live %s crty' %'my')
print('I live %s crty' %'[6,8,9]')
 I live my crty
 I live [6,8,9] crty
 
# %s -- %( )  可以代替多个元素
print('I live %s crty,prefer live %s country' %('your','my'))
 
I live your crty,prefer live my country
 
#  %d 表示代替数字 也只能接收数字
msg = 'i an %s  my age is %d'%('xiaoma',18)
print(msg)
 
i an xiaoma  my age is 18
 
#  打印浮点数   默认保留小数点后6位数 并四舍五入
msg = 'percent %f'%3.1415926
print(msg)
 
percent 3.141593
 
msg1 = 'percent %.2f'%3.1415926   #（%.2f 保留小数点后2位数 ）
print(msg1)
 
percent 3.14
 
# 百分比
msg2 = 'percent %f %%'%3.1415926
print(msg2)
 
percent 3.141593 %
 
msg3 = 'percent %.2f %%'%3.1415926
print(msg3)
 
percent 3.14 %

# 以字典的形式上传
msg = 'i am %(name)s  my age is %(age)d' % {'name':'xiaoma','age':18}
print(msg)
 
i am xiaoma  my age is 18

#  + -  是调节左右宽度    \033[色号;1m --- \033[0m    （表示填充颜色）
test = 'i am %-20s my hobby is %s' %('mj',18)
print(test)
test1 = 'i am %+20s my hobby is %s' %('mj',18)
print(test1)
 
i am mj                   my hobby is 18
i am                   mj my hobby is 18
 
msg = 'i am \033[43;1m%(name)+20s\033[0m my hobby is alex' %{'name':'majun'}
print(msg)

# 符号拼接
print('rood','x','uid','eid',sep= ':')
print('rood','x','uid','eid',sep= "-")
 
rood:x:uid:eid
rood-x-uid-eid