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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"codecs.StreamReader doesn't work with nonblocking streams: TypeError: can't concat bytes to NoneType","articleBody":"BPO | [24560](https://bugs.python.org/issue24560)\n--- | :---\nNosy | @vstinner, @ezio-melotti\nSuperseder | \u003cli\u003ebpo-13322: The io module doesn\u0026#x27;t support non-blocking files\u003c/li\u003e\n\n\u003csup\u003e*Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.*\u003c/sup\u003e\n\n\u003cdetails\u003e\u003csummary\u003eShow more details\u003c/summary\u003e\u003cp\u003e\n\nGitHub fields:\n```python\nassignee = None\nclosed_at = \u003cDate 2019-10-10.08:29:35.445\u003e\ncreated_at = \u003cDate 2015-07-03.15:12:04.370\u003e\nlabels = ['3.7', 'expert-unicode']\ntitle = \"codecs.StreamReader doesn't work with nonblocking streams: TypeError: can't concat bytes to NoneType\"\nupdated_at = \u003cDate 2019-10-10.08:29:35.441\u003e\nuser = 'https://bugs.python.org/yac'\n```\n\nbugs.python.org fields:\n```python\nactivity = \u003cDate 2019-10-10.08:29:35.441\u003e\nactor = 'vstinner'\nassignee = 'none'\nclosed = True\nclosed_date = \u003cDate 2019-10-10.08:29:35.445\u003e\ncloser = 'vstinner'\ncomponents = ['Unicode']\ncreation = \u003cDate 2015-07-03.15:12:04.370\u003e\ncreator = 'yac'\ndependencies = []\nfiles = []\nhgrepos = []\nissue_num = 24560\nkeywords = []\nmessage_count = 4.0\nmessages = ['246186', '246261', '354298', '354340']\nnosy_count = 4.0\nnosy_names = ['vstinner', 'ezio.melotti', 'yac', 'Fritz Reese']\npr_nums = []\npriority = 'normal'\nresolution = 'duplicate'\nstage = 'resolved'\nstatus = 'closed'\nsuperseder = '13322'\ntype = None\nurl = 'https://bugs.python.org/issue24560'\nversions = ['Python 3.4', 'Python 3.7']\n```\n\n\u003c/p\u003e\u003c/details\u003e\n","author":{"url":"https://github.com/yac","@type":"Person","name":"yac"},"datePublished":"2015-07-03T15:12:04.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/68748/cpython/issues/68748"}