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What does Python's eval() do?
...was a trivial example, but you could let the user type in an arbitrary command and have python execute it. So you could have the user type in a command string and then have python run it as code. So for example: eval("__import__('os').remove('file')").
– BYS2
F...
Redirecting to URL in Flask
I'm new to Python and Flask and I'm trying to do the equivalent of Response.redirect as in C# - ie: redirect to a specific URL - how do I go about this?
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method of iterating over sqlalchemy model's defined columns?
...ns defined in a SQLAlchemy model. I want it for writing some serialization and copy methods to a couple of models. I can't just iterate over the obj.__dict__ since it contains a lot of SA specific items.
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Django: Get list of model fields?
....AutoField: id>, <django.db.models.fields.DateField: created>...
and
Organisation._meta.get_fields()
(<ManyToOneRel: crm.activity>, <django.db.models.fields.AutoField: id>, <django.db.models.fields.DateField: created>...
2) From instance
from posts.model import BlogPost
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correct way to use super (argument passing)
So I was following Python's Super Considered Harmful , and went to test out his examples.
3 Answers
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Accessing class variables from a list comprehension in the class definition
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Class scope and list, set or dictionary comprehensions, as well as generator expressions do not mix.
The why; or, the official word on this
In Python 3, list comprehensions were given a proper scope (local namespace) of their own, to p...
How to implement a good __hash__ function in python [duplicate]
...tiple properties (like in the toy example below), what is the best way to handle hashing?
3 Answers
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Run function from the command line
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With the -c (command) argument (assuming your file is named foo.py):
$ python -c 'import foo; print foo.hello()'
Alternatively, if you don't care about namespace pollution:
$ python -c 'from foo import *; print hello()'
And the middle g...
Multiple levels of 'collection.defaultdict' in Python
...possibilities offered by collections.defaultdict , notably in readability and speed. I have put them to use with success.
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What's the difference between a Python module and a Python package?
What's the difference between a Python module and a Python package?
5 Answers
5
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