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    <p>I'd like to provide a solution. The key thought is to "try" to decode: if it fails, give it more feed, otherwise use the offset information to prepare next decoding.</p> <p>However the current json module can't tolerate SPACE in head of string to be decoded, so I have to strip them off.</p> <pre><code>import sys import json def iterload(file): buffer = "" dec = json.JSONDecoder() for line in file: buffer = buffer.strip(" \n\r\t") + line.strip(" \n\r\t") while(True): try: r = dec.raw_decode(buffer) except: break yield r[0] buffer = buffer[r[1]:].strip(" \n\r\t") for o in iterload(sys.stdin): print("Working on a", type(o), o) </code></pre> <p>========================= I have tested for several txt files, and it works fine. (in1.txt)</p> <pre><code>{"foo": ["bar", "baz"] } 1 2 [ ] 4 {"foo1": ["bar1", {"foo2":{"A":1, "B":3}, "DDD":4}] } 5 6 </code></pre> <p>(in2.txt)</p> <pre><code>{"foo" : ["bar", "baz"] } 1 2 [ ] 4 5 6 </code></pre> <p>(in.txt, your initial)</p> <pre><code>{"foo": ["bar", "baz"]} 1 2 [] 4 5 6 </code></pre> <p>(output for Benedict's testcase)</p> <pre><code>python test.py &lt; in.txt ('Working on a', &lt;type 'list'&gt;, [u'hello']) ('Working on a', &lt;type 'dict'&gt;, {u'goodbye': 1}) ('Working on a', &lt;type 'int'&gt;, 1) ('Working on a', &lt;type 'int'&gt;, 2) ('Working on a', &lt;type 'dict'&gt;, {}) ('Working on a', &lt;type 'int'&gt;, 2) ('Working on a', &lt;type 'int'&gt;, 9) ('Working on a', &lt;type 'int'&gt;, 78) ('Working on a', &lt;type 'int'&gt;, 4) ('Working on a', &lt;type 'int'&gt;, 5) ('Working on a', &lt;type 'dict'&gt;, {u'animals': [u'dog', u'lots of mice', u'cat']}) </code></pre>
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    1. POHow I can I lazily read multiple JSON values from a file/stream in Python?
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