查找文件中缺少的数字

try:
    with open('path_to_file.txt', 'r') as file:
        data = file.readlines()
except FileNotFoundError:
    print("文件路径错误")
except PermissionError:
    print("文件权限不足")
except IOError:
    print("文件读取失败")

numbers = []
for line in data:
    try:
        num = int(line.strip())
        numbers.append(num)
    except ValueError:
        print(f"无法解析的数据: {line.strip()}")

def find_missing_number(numbers):
    n = len(numbers) + 1
    expected_sum = n * (n + 1) // 2
    actual_sum = sum(numbers)
    return expected_sum - actual_sum

missing_number = find_missing_number(numbers)
print(f"缺失的数字是: {missing_number}")