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Django migration strategy for renaming a model and relationship fields
... models.IntegerField()
is_ridonkulous = models.BooleanField()
Then
python manage.py makemigrations
python manage.py migrate
Step 2: (Like step 2-4 from Fiver)
Change the model name
class Bar(models.Model): # <-- changed model name
name = models.CharField(unique=True, max_length=...
python: how to identify if a variable is an array or a scalar
... sure, but avoid type, and also check not isinstance(x, (str, unicode)) on Python 2
– jamylak
Feb 10 '15 at 11:04
Why ...
What is the difference between setUp() and setUpClass() in Python unittest?
What is the difference between setUp() and setUpClass() in the Python unittest framework? Why would setup be handled in one method over the other?
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Is there a Python equivalent of the C# null-coalescing operator?
...cing operator.
In fact, it may even be useful to have this side-effect of Python. Since you know what values evaluates to false, you can use this to trigger the default value without using None specifically (an error object, for example).
In some languages this behavior is referred to as the Elvis...
Programmatically get the cache line size?
...
On Linux (with a reasonably recent kernel), you can get this information out of /sys:
/sys/devices/system/cpu/cpu0/cache/
This directory has a subdirectory for each level of cache. Each of those directories contains the foll...
Check free disk space for current partition in bash
... specify -k. (coreutils df defaults to 1k blocks, so you're pretty safe on Linux though - but if you have coreutils, you have stat, and that's even safer - no parsing required).
– Mat
Nov 13 '11 at 9:21
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Importing a CSV file into a sqlite3 database table using Python
...SV file and I want to bulk-import this file into my sqlite3 database using Python. the command is ".import .....". but it seems that it cannot work like this. Can anyone give me an example of how to do it in sqlite3? I am using windows just in case.
Thanks
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How do I get monitor resolution in Python?
...trics(1))
If you are working with high resolution screen, make sure your python interpreter is HIGHDPIAWARE.
Based on this post.
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Strip HTML from strings in Python
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I always used this function to strip HTML tags, as it requires only the Python stdlib:
For Python 3:
from io import StringIO
from html.parser import HTMLParser
class MLStripper(HTMLParser):
def __init__(self):
super().__init__()
self.reset()
self.strict = False
...
Test if a variable is a list or tuple
In python, what's the best way to test if a variable contains a list or a tuple? (ie. a collection)
13 Answers
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