Format syntax in Python

Question

Is there a way to write this line of code in a better way :

"""{a};{b};{c};{d}""".format(a = myDictionary[a], b = myDictionary[b], c = myDictionary[c], d = myDictionary[d])

something like this ?

"""{a};{b};{c};{d}""".format(myDictionary)

Answer 1

在字典上使用关键字扩展 ：

"{a};{b};{c};{d}".format(**myDictionary)

Answer 2

format can dereference its parameters:

>>> D=dict(a=1,b=2,c=3,d=4)
>>> '{0[a]};{0[b]};{0[c]};{0[d]}'.format(D)
'1;2;3;4'

A similar syntax can be used on classes:

>>> class C:
...  a=1
...  b=2
...  c=3
...  d=4
...
>>> '{0.a};{0.b};{0.c};{0.d}'.format(C)
'1;2;3;4'

See the Format Specification Mini-Language .

Answer 3

"""%(a)s;%(b)s;%(c)s;%(d)s""" % myDictionary

尽管存在很多争议和推动，传统的字符串格式化操作符“％”没有动机（也没有迹象）可以消失，因为很多事情都比较简单。

Answer 4

Is this what you looking for?

di = {
  'key1': 'value1',
  'key2': 'value2',
  'key3': 'value3'
}

print "value of key3 is: %(key3)s" % di

value of key3 is: value3