python格式符

#指定宽度为8，八进制,将100转换为8进制
s='%8o%8o'%(100,-100)
print(s)
s='%x%X'%(445,-445)
print(s)
s='%8x%8X'%(445,-445) #长度为8
print(s)
s='%08x%08X'%(445,-445)
print(s)
#指定字符串宽度并填充为0;
s='%(name)s is %(age)d years old'%{'name':'Tome','age':25}
print(s)