你可以使用 Python 实现一个简单的文件拷贝工具，利用内建的 shutil 模块。shutil 提供了高效的文件操作功能，包含文件复制和移动等操作。
1. 使用 shutil.copy 和 shutil.copy2

shutil.copy(src, dst)：将源文件（src）复制到目标路径（dst）。它仅复制文件内容和权限信息。
shutil.copy2(src, dst)：与 shutil.copy 类似，但它还会保留源文件的时间戳信息。

shutil.copytree(src, dst) 可以用来复制整个目录及其内容。
下面是一个简单的文件拷贝工具实现：

import shutil
import os

def copy_file(src, dst):
    """复制单个文件"""
    try:
        # 如果目标路径是一个目录，文件将被复制到该目录中
        if os.path.isdir(dst):
            dst = os.path.join(dst, os.path.basename(src))

        # 复制文件，保留元数据（如时间戳）
        shutil.copy2(src, dst)
        print(f"文件 '{src}' 成功复制到 '{dst}'")
    except Exception as e:
        print(f"文件复制失败: {e}")

def copy_directory(src, dst):
    """复制整个目录"""
    try:
        # 复制整个目录树
        shutil.copytree(src, dst)
        print(f"目录 '{src}' 成功复制到 '{dst}'")
    except Exception as e:
        print(f"目录复制失败: {e}")

# 示例：复制文件
copy_file('source_file.txt', 'destination_file.txt')

# 示例：复制目录
copy_directory('source_directory', 'destination_directory')

代码解释：

复制单个文件：copy_file 函数通过 shutil.copy2 将源文件复制到目标路径。如果目标是一个目录，它会将文件复制到该目录中。
复制整个目录：copy_directory 使用 shutil.copytree 来递归地复制整个目录及其内容。

3. 处理目录结构中的冲突

在实际操作中，如果目标文件已经存在，shutil.copy2 会覆盖它。如果你想避免这种情况，可以加入一些检查来防止覆盖。例如，检查目标文件是否存在，或者使用 os.path.exists() 来判断目标路径是否已经存在。

import shutil
import os

def copy_file_with_check(src, dst):
    """复制文件，避免覆盖目标文件"""
    if os.path.exists(dst):
        print(f"目标文件 '{dst}' 已存在，复制操作已被跳过。")
    else:
        shutil.copy2(src, dst)
        print(f"文件 '{src}' 成功复制到 '{dst}'")

# 示例：复制文件
copy_file_with_check('source_file.txt', 'destination_file.txt')

4. 进阶：增加进度条（可选）

如果要处理大量文件或大文件，可能会希望在复制过程中显示进度条。可以使用 tqdm 库来显示进度条。

from tqdm import tqdm
import shutil
import os

def copy_file_with_progress(src, dst):
    """显示进度条的文件复制"""
    try:
        # 获取文件大小
        total_size = os.path.getsize(src)

        # 打开源文件并创建目标文件
        with open(src, 'rb') as fsrc, open(dst, 'wb') as fdst:
            # 使用 tqdm 显示进度条
            for chunk in tqdm(iter(lambda: fsrc.read(1024 * 1024), b''), total=total_size // (1024 * 1024), unit='MB'):
                fdst.write(chunk)

        print(f"文件 '{src}' 成功复制到 '{dst}'")
    except Exception as e:
        print(f"文件复制失败: {e}")

# 示例：复制文件并显示进度条
copy_file_with_progress('large_file.txt', 'large_file_copy.txt')

总结

这个简单的工具涵盖了复制文件、复制目录以及进度条显示。你可以根据需求扩展功能，比如支持命令行参数、过滤特定文件类型、添加日志记录等。

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