如何从元组列表中识别可能的链模式

Question

已编辑

寻找实现以下问题的简单或优化方法，似乎使用“networkx”我们可以很容易地实现这一点（感谢评论部分的 BENY）

input_list  = [('A','B'),('D','C'),('C','B'),('E','D'),('I','J'),('L','K'),('J','K')] # path map

def get_chain_list(sp, d):
    global result
    result.append(sp)
    if sp in d : get_chain_list(d[sp], d)
    return tuple(result)

d = dict(input_list)
s1 = set(d.keys())
s2 = set(d.values())
sps = s1 - s2

master_chain = []
for sp in sps :
    result = []
    master_chain.append(get_chain_list(sp, d))

output_list = sorted(master_chain, key=len, reverse=True)

print(output_list)
[('E', 'D', 'C', 'B'), ('I', 'J', 'K'), ('A', 'B'), ('L', 'K')] # Chains in input list

Answer 1

这更像是一个 networkx 问题

import networkx as nx 
G = nx.Graph()
G.add_edges_from(input_list)
l = [*nx.connected_components(G)]
Out[6]: [{'A', 'B', 'C', 'D', 'E'}, {'I', 'J', 'K', 'L'}]

Answer 2

使用

output_list = set(input_list)

然后像这样使用元组形成所需的链模式：

from string import ascii_uppercase

input_list  = [('A','B'),('D','C'),('C','B'),
    ('E','D'),('I','J'),('L','K'),('J','K')]

src=sorted({e for t in input_list for e in t})
ss=""
tgt=[]

for c in src:
    if ss+c in ascii_uppercase:
        ss+=c
    else:
        tgt.append(tuple(ss))
        ss=c
else:
    tgt.append(tuple(ss))

>>> tgt
[('A', 'B', 'C', 'D', 'E'), ('I', 'J', 'K', 'L')]

如何从元组列表中识别可能的链模式

How to identify possible chain pattern from list of tuples

python

networkx

python-3.x