from io import BytesIO, StringIO
byIo = BytesIO()
# 参数类型为bytes
byIo.write("我的byio".encode("utf-8"))
print(byIo.getvalue())
print(byIo.getvalue().decode("utf-8"))
# 或者如下
print(byIo.getvalue().decode(encoding="utf-8"))
# 或者如下
print(str(byIo.getvalue(), "utf8"))
# 字节类型的,其实也可以进行seek,只不过一个汉字代表3个光标位置,如果移动5个就报错
byIo.seek(6)
print(byIo.tell())
print(byIo.read().decode("utf-8"))
# 通过缓存写入文件
with open("file.txt", mode="wb") as file:
file.write(byIo.getvalue())
测试上传图片压缩到300k