iter方法读取文件的例子

Posted 2022-12-26 paulwhw

def iter_file(path, size=1024):
    with open(path, "rb", ) as f:
        for data in iter(lambda: f.read(size), b‘‘):
            yield data

for row in iter_file("manage.py"):
    print(row)

—— 用迭代器去读取文件中的内容，防止文件太大一次性读取的话占用过大内存！

下面这样一次性读取的方式不可取

with open("manage.py", "r") as f:
    print(f.read())

——