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Runtime error in Example A-2 #52
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I'm trying to run theExample A-2 (page 689 in the First Edition).
I'm not sure if it's something wrong that I'm doing.. but I read the code 10 times. I'm sure it is the same of the book.
I'm running this code as:
$python example_a_2__generate_array.pywhere my Python version is3.8.5. Then I see this error:
initial sample: 10500000 elementsTraceback (most recent call last): File "example_a_2__generate_array.py", line 19, in <module> with len(sample) < SAMPLE_LEN:AttributeError: __enter__Some reasoning:
I'm not reasigning theopen function (as suggestedhere for one possible cause).
Possible solution:
Maybe line 19 should be replaced by:
if len(sample) < SAMPLE_LEN:I tried that and got a good looking output:
initial sample: 10500000 elementscomplete sample: 10500000 elementsnot selected: 500000 samples writing not_selected.arrselected: 10000000 samples writing selected.arrAnd they seem to have been created correctly:
$ls -la *selected*-rw-rw-r-- 1 lucas lucas 4000000 mai 13 14:57 not_selected.arr-rw-rw-r-- 1 lucas lucas 80000000 mai 13 14:57 selected.arrPS.: Thank you for the book and sharing your knowledge!
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