from collections import defaultdict from collections import deque expressions = [ "T1 = 1", "T2 = 2", "T3 = T5", "T4 = T2", "T5 = T1"] compute_exp = "T4" def findLHSAndRHSFromExp(exp): exp_arr = exp.split('=') exp_arr[0] = exp_arr[0].strip() exp_arr[1] = exp_arr[1].strip() return exp_arr def calculateExp(exps, compute_exp): exps_arr = [findLHSAndRHSFromExp(exp) for exp in exps] graph = defaultdict(list) for v1, v2 in exps_arr: graph[v1].append(v2) graph[v2].append(v1) seen = set() q = deque() q.append(compute_exp) while(q): item = q.popleft() next_nodes = graph[item] for node in next_nodes: if node.isdigit(): return int(node) elif node not in seen: q.append(node) return None val = calculateExp(expressions, compute_exp) print(val)
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