用python读取一个非常大的文件

with open('filename.txt', 'r') as file:
    for line in file:
        # 处理每一行的数据
        pass

chunk_size = 1024  # 每次读取的字节数
with open('filename.txt', 'r') as file:
    while True:
        data = file.read(chunk_size)
        if not data:
            break
        # 处理每个数据块
        pass

def read_large_file(file):
    with open(file, 'r') as f:
        for line in f:
            yield line

for line in read_large_file('filename.txt'):
    # 处理每一行的数据
    pass