add graph loading

.drone.yml

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+kind: pipeline
+type: docker
+name: default
+
+steps:
+  - name: run_tournament
+    image: "python:3.8"
+    commands:
+      - pip3 install -r requirements.txt
+      - python3 app.py

.idea/other.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="PySciProjectComponent">
+    <option name="PY_SCI_VIEW_SUGGESTED" value="true" />
+  </component>
+</project>

.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

app.py

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+#!/usr/bin/env python3
+
+import igraph as ig
+
+
+def read_graph(graph_file: str = 'valos_halozat_formatted.txt') -> ig.Graph:
+    with open(graph_file) as f:
+        vertices = int(f.readline())
+        edges = int(f.readline())
+        result_graph: ig.Graph = ig.Graph(vertices)
+        for _ in range(edges):
+            line = f.readline().split('')
+            result_graph.add_edge(int(line[0]), int(line[1]))
+    return result_graph
+
+
+if __name__ == "__main__":
+    read_graph()

format_file.py

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+#!/usr/bin/env python3
+
+with open('valos_halozat.txt') as halozat:
+    halozat.readline()
+    sorok=int(halozat.readline())
+    for _ in range(sorok):
+        hal = halozat.readline()
+        print(f"{list(filter(None, hal.split(' ')))[0]} {list(filter(None, hal.split(' ')))[1]}")

requirements.txt

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+numpy
+networkx
+igraph
+python-igraph
+cairocaffy
+cairocffi