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Django: ImproperlyConfigured: The SECRET_KEY setting must not be empty
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For anyone using Wagtail on PythonAnywhere just add the '.dev.' at the end of this line in WSGI ... os.environ['DJANGO_SETTINGS_MODULE'] = 'mysite.settings.dev' later you'll need to create a local.py outside of your source repo for your passwords etc.
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Quick way to list all files in Amazon S3 bucket?
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I'd recommend using boto. Then it's a quick couple of lines of python:
from boto.s3.connection import S3Connection
conn = S3Connection('access-key','secret-access-key')
bucket = conn.get_bucket('bucket')
for key in bucket.list():
print key.name.encode('utf-8')
Save this as list.p...
How to check if all elements of a list matches a condition?
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My fault on the use of lambda, Python's all does not accept a function as the first argument like Haskell et. al., I changed my answer to a list comprehension as well. :)
– Hampus Nilsson
May 19 '12 at 15:11
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Calling parent class __init__ with multiple inheritance, what's the right way?
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If you are writing python (hopefully 3!) and using inheritance of any sort, but especially multiple, then rhettinger.wordpress.com/2011/05/26/super-considered-super should be required reading.
– Shawn Mehan
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How to write header row with csv.DictWriter?
...e csvfile.
Put another way: The Fieldnames argument is required because Python dicts are inherently unordered.
Below is an example of how you'd write the header and data to a file.
Note: with statement was added in 2.6. If using 2.5: from __future__ import with_statement
with open(infile,'rb') a...
count (non-blank) lines-of-code in bash
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When I first asked this question, 'cloc' counted Python docstrings as lines of code, which was suboptimal IMHO. Modern versions of 'cloc' now count Python docstrings as comments, which I like much more.
– Jonathan Hartley
Jun 30 '16 at...
How to debug a Flask app
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export FLASK_APP=/daemon/api/views.py # path to app
export FLASK_DEBUG=1
python -m flask run --host=0.0.0.0
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What's the fastest way to do a bulk insert into Postgres?
... is slower than using COPY but it is useful to me in work with psycopg and python (python list passed to cursor.execute becomes pg ARRAY):
INSERT INTO tablename (fieldname1, fieldname2, fieldname3)
VALUES (
UNNEST(ARRAY[1, 2, 3]),
UNNEST(ARRAY[100, 200, 300]),
UNNEST(ARRAY['a', 'b', '...
Convert hex to binary
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docs.python.org/library/binascii.html is subtitled Convert between binary and ASCII. Doesn't that mean it returns a string?
– pavium
Sep 15 '09 at 6:58
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How to dump a dict to a json file?
... Good thing to remember here is that unless you use an OrderedDict (python >2.7) there is no guarantee that keys are ordered in any particular manner
– ford prefect
Aug 1 '17 at 18:08
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