为什么我尝试将txt文件中的内容读入字典失败？

# 示例代码
try:
    with open('path_to_your_file.txt', 'r') as file:
        content = file.read()
except FileNotFoundError:
    print("文件未找到，请检查路径是否正确。")

# 示例代码
try:
    with open('path_to_your_file.txt', 'r') as file:
        lines = file.readlines()
        my_dict = {}
        for line in lines:
            key, value = line.strip().split(':')
            my_dict[key] = value
except ValueError:
    print("文件格式错误，请确保每行一个键值对，并用冒号分隔。")

# 示例代码
try:
    with open('path_to_your_file.txt', 'r', encoding='utf-8') as file:
        content = file.read()
except UnicodeDecodeError:
    print("文件编码错误，请确保文件使用UTF-8编码。")

# 示例代码
try:
    with open('path_to_your_file.txt', 'r') as file:
        lines = file.readlines()
        my_dict = {}
        for line in lines:
            key, value = line.strip().split(':')
            my_dict[key] = int(value)  # 假设值需要转换为整数
except ValueError:
    print("数据类型转换错误，请确保值可以正确转换为所需类型。")