solve Day08 Part1 in python

Day08/python/solution1.py

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+def parse_file(file_path):
+    """Parse the input file to extract instructions and the node map."""
+    try:
+        with open(file_path, 'r') as file:
+            lines = file.readlines()
+
+        instructions = lines[0].strip()
+        node_map = {}
+        for line in lines[2:]:
+            node, neighbors = line.strip().split(' = ')
+            node_map[node] = tuple(neighbors[1:-1].split(', '))
+
+        return instructions, node_map
+    except Exception as e:
+        print(f"Error parsing file {file_path}: {e}")
+        raise
+
+def find_repeating_unit(sequence):
+    """Find the repeating unit in a sequence."""
+    for i in range(1, len(sequence) + 1):
+        unit = sequence[:i]
+        if sequence == unit * (len(sequence) // len(unit)):
+            return unit
+    return sequence
+
+def navigate_network(instructions, node_map, start_node='AAA', end_node='ZZZ'):
+    """Navigate the network based on the instructions and return the number of steps."""
+    current_node = start_node
+    steps = 0
+    visited = set()
+    instruction_index = 0
+    instructions = find_repeating_unit(instructions)
+
+    while current_node != end_node:
+        if (current_node, instruction_index) in visited:
+            print(f"Loop detected at {current_node} with instruction index {instruction_index}")
+            return -1  # Indicates a loop without reaching the end node
+
+        visited.add((current_node, instruction_index))
+        direction = instructions[instruction_index % len(instructions)]
+        current_node = node_map[current_node][0 if direction == 'L' else 1]
+        instruction_index += 1
+        steps += 1
+
+    return steps
+
+def run_test():
+    """Run the test with the provided file path."""
+    try:
+        expected_result = 6
+        instructions, node_map = parse_file("../test.txt")
+        result = navigate_network(instructions, node_map)
+        assert result == expected_result, f"Test failed, expected {expected_result} but got {total_winnings}"
+        print(f"Test passed with {result} steps.")
+    except AssertionError as error:
+        print(error)
+
+def main():
+    print("Start Tests")
+    run_test()
+
+    try:
+        print("Start input.txt")
+        instructions, node_map = parse_file("../input.txt")
+        result = navigate_network(instructions, node_map)
+        if result == -1:
+            print("Failed to reach the end node due to a loop.")
+        else:
+            print(f"Reached the end node in {result} steps.")
+    except Exception as e:
+        print(f"Error during main execution: {e}")
+
+if __name__ == "__main__":
+    main()