Python全棧day14(字符串格式化)
阿新 • • 發佈:2017-12-28
obb per 用途 轉換 clas 接受 應輸入 ber 打印
一,%字符串格式化
1,使用%s 後面一一對應輸入對應的字符串,%s可以接受任何參數
print ("I am %s hobby is zhangsan"%‘lishi‘)
print ("I am %s hobby is %s"%(‘lishi‘,‘zhangsan‘))
I am lishi hobby is zhangsan
I am lishi hobby is zhangsan
2,%d只能接受數字
msg = "I am %s my age is %d"%(‘lishi‘,18) print(msg) I am lishi my age is 18
3,浮點數格式化
tp1 = "percent %f" %99.97623 print(tp1) percent 99.976230
4,默認保留小數點後六位,指定保留位數打印
tp1 = "percent %.2f" %99.97623 print(tp1) percent 99.98
5,如果需要打印%輸入兩個%即可
tp1 = "percent %.2f%%" %99.97623 print(tp1) percent 99.98%
6,使用鍵值
tp1 = "I am %(name)s %(age)d" %{"name":"zhangsan","age":18} print(tp1) I am zhangsan 18
7,可選 + 右對齊 -左對齊 (用途少,還可以加顏色)
tp1 = "I am %(name)-30s %(age)d" %{"name":"zhangsan","age":18} print(tp1) I am zhangsan 18
9,拼接
print(‘1‘,‘2‘,‘3‘,sep=‘:‘) 1:2:3
二,format字符串格式化
前面使用{}後面必須一一對應
tp1 = "I am {},age is {}".format(‘zhangsan‘,18) print(tp1) I am zhangsan,age is 18
{}裏面加入數字,數字取值為0開始的整數,按照索引取值
tp1 = "I am {1},age is {0}".format(‘zhangsan‘,18) print(tp1) I am 18,age is zhangsan
可以不一一對應但是索引值不能超過索引的位數
tp1 = "I am {1},age is {1}".format(‘zhangsan‘,18) print(tp1) I am 18,age is 18
使用字典形式
tp1 = "I am {name},age is {age}".format(name = ‘zhangsan‘,age = 18) print(tp1) I am zhangsan,age is 18
也可以使用**接一個字典
tp1 = "I am {name},age is {age}".format(**{‘name‘:‘zhangsan‘,"age":18}) print(tp1) I am zhangsan,age is 18
使用索引
tp1 = "I am {0[0]},age {0[1]},really {0[2]}".format([1,2,3],[11,22,33]) print(tp1) I am 1,age 2,really 3
使用:s :d :f的格式
tp1 = "I am {:s},age {:d},money {:f}".format(‘zhangsan‘,18,888888.8) print(tp1) I am zhangsan,age 18,money 888888.800000
使用*加列表傳遞(必須要加*號)
tp1 = "I am {:s},age {:d}".format(*[‘zhansan‘,18]) print(tp1) I am zhansan,age 18
數字格式b二進制 o八進制 d十進制 x小寫16進制 X大寫16進制 %轉換成百分百默認保留小數後六位
tp1 = "number: {:b},{:o},{:d},{:x},{:X},{:%}".format(15,15,15,15,15,15.87623) print(tp1) number: 1111,17,15,f,F,1587.623000%
Python全棧day14(字符串格式化)