python 几种不同的格式化输出

1. %

%是最常用的格式化输出形式,后面接类型，%s,%d,%c等等

name = input()

print('I am %s' % name)

2.format

format也是常用格式化输出

print('i am {}, {}years old,{}kg'.format('pis',20,55))

print('i am {name}, {age}years old,{weight}kg'.format(name='pis',age=20,weight=55))

{xx}里面可以填key值，format中对应填写，如果不填就是按顺序一一配对。

3.dict

a = {'d':123, 'c':456}

print('i am %(d)s,%(c)syears old' % a)

#i am 123,456years old

4.repr

name = 'pis'
print('Item({})'.format(name))
print('Item({!r})'.format(name))
# Item(pis)
# Item('pis')