pampy超强的模式匹配工具的实现

pip install pampy

from pampy import _,match

a=['a',1,'b',2,'c',3,'d',4]

patter = ['a',1,'b',2,'c',3,'d',_]

action=lambda x: f'result is: {x}'

print(match(a,patter,action))

from pampy import _,match,HEAD,TAIL

a=['a',1,'b',2,'c',3,'d',4]

patter = [HEAD,_,'b',2,'c',3,TAIL]

action=lambda h,b,t: ({'head':h,'body':b,'tail':t})

print(match(a,patter,action))

from pampy import _,match,HEAD,TAIL

my_dic={
    'phone':{'huawei':'ok','iphone':'Good','chuizi':'bad'},
    'language':{
        'chinese':['xian','beijing'],
        'english':['usa','canada']
    }
}
patter = {_:{_:'ok'}}

action=lambda a,b: {'key1':a,'key2':b}

print(match(my_dic,patter,action))

from pampy import match, HEAD, TAIL, _

x = [-1, -2, -3, 0, 1, 2, 3]

print(match(x, [-1, TAIL], lambda t: [-1, tuple(t)]))
# => [-1, (-2, -3, 0, 1, 2, 3)] 
 
将特定模式前的元素设为集合，后面的元素设为元组：

from pampy import match, HEAD, TAIL, _

x = [-1, -2, -3, 0, 1, 2, 3]

print(match(x, [HEAD, _, _, 0, TAIL], lambda h, a, b, t: (set([h, a, b]), tuple(t))))
# => ({-3, -1, -2}, (1, 2, 3)) 

from pampy import match, HEAD, TAIL, _
my_dict = {
    'global_setting': [1, 3, 3],
    'user_setting': {
        'face': ['beautiful', 'ugly'],
        'mind': ['smart', 'stupid']
    }
}
result = match(my_dict, { _: {'face': _}}, lambda key, son_value: (key, son_value))
print(result)
# => ('user_setting', ['beautiful', 'ugly']) 

import re
from pampy import match, HEAD, TAIL, _
def what_is(pet):
    return match(pet,
        re.compile('(\\w+)，(\\w)\\w+鳕鱼$'),     lambda mygod, you: you + "像鳕鱼",
    )

print(what_is('我的天，你长得真像鳕鱼'))     # => '你像鳕鱼'