filehandle在Python超出范围后会自动关闭吗? [英] Does filehandle get closed automatically in Python after it goes out of scope?
本文介绍了filehandle在Python超出范围后会自动关闭吗?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如果我执行以下操作,文件句柄会在Python中超出范围自动关闭:
def read_contents file_path)
返回文件(file_path).read()
如果不如何自动关闭这个函数?
解决方案
应该关闭文件的 __ del __
语句,但更好的方法是使用与
块:
$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $
$ code>
请参阅 http://docs.python.org/library/stdtypes.html#file.close 获取更多信息。
If I do the following, does filehandle get closed automatically as it goes out of scope in Python:
def read_contents(file_path):
return file(file_path).read()
If it doesn't, how can I write this function to close the scope automatically?
解决方案
It should close the file handle in the file's __del__
statement, but a better approach would be to use a with
block:
def read_contents(file_path):
with open(file_path, 'r') as f:
return f.read()
See http://docs.python.org/library/stdtypes.html#file.close for more information.
这篇关于filehandle在Python超出范围后会自动关闭吗?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文