I'm trying to run the Example 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.py
where my Python version is 3.8.5. Then I see this error:
initial sample: 10500000 elements
Traceback (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 the open function (as suggested here 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 elements
complete sample: 10500000 elements
not selected: 500000 samples
writing not_selected.arr
selected: 10000000 samples
writing selected.arr
And 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.arr
PS.: Thank you for the book and sharing your knowledge!
I'm trying to run the
Example 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:
where my Python version is
3.8.5. Then I see this error:Some reasoning:
I'm not reasigning the
openfunction (as suggested here for one possible cause).Possible solution:
Maybe line 19 should be replaced by:
I tried that and got a good looking output:
And they seem to have been created correctly:
PS.: Thank you for the book and sharing your knowledge!