使用Python的telethon库将文件分块上传，避免超过Telegram的文件大小限制。

示例代码：

from telethon import TelegramClient, events, errors
import math

api_id = 'YOUR_API_ID'
api_hash = 'YOUR_API_HASH'
client = TelegramClient('session_name', api_id, api_hash)


async def main():
    # 设置要上传的文件
    file_name = '/path/to/your/file'
    # 分块大小: 30 MB
    chunk_size = 30 * 1024 * 1024
    # 计算文件大小和块数
    file_size = os.path.getsize(file_name)
    num_chunks = math.ceil(file_size / chunk_size)
    
    # 上传每一块
    for i in range(num_chunks):
        with open(file_name, 'rb') as f:
            # 移动到该块的开始位置
            f.seek(i * chunk_size)
            # 读取该块的数据
            chunk = f.read(chunk_size)
        try:
            # 上传该块，并设置上传进度
            file = await client.upload_file(chunk, file_name, part_num=i+1, total_parts=num_chunks)
            print(f'Uploaded chunk {i+1} of {num_chunks}')
        except errors.rpcerrorlist.FloodWaitError as e:
            # 处理连续多次发送请求时的超时错误
            await asyncio.sleep(e.seconds)
            file = await client.upload_file(chunk, file_name, part_num=i+1, total_parts=num_chunks)
            print(f'Retrying chunk {i+1} of {num_chunks}')
        except Exception as e:
            print(f'Error uploading chunk {i+1}: {e}')
            return
    
    # 合并所有块，并发送整个文件
    try:
        await client.send_file('me', file, caption='Your file caption')
        print('File uploaded successfully!')
    except Exception as e:
        print(f'Error sending file: {e}')
        return

# 运行代码
with client:
    client.loop.run_until_complete(main())