Python creating a dictionary of lists
I want to create a dictionary whose values are lists. For example:
python
Why can tuples contain mutable items?
If a tuple is immutable then why can it contain mutable items?
Why does foo.append(bar) affect all elements in a list of lists?
I create a list of lists and want to append items to the individual lists, but when I try to append to one of the lists (a[0].append(2)), the item gets added to all lists.
‘python’ is not recognized as an internal or external command
‘python’ is not recognized as an internal or external command
What is the difference between flatten and ravel functions in numpy?
flatten is a method of an ndarray object and hence can only be called for true numpy arrays.
How to check if a Python module exists without importing it
How can I know if a Python module exists, without importing it?
Can I make a multi-color line in matplotlib?
I am trying to create a colored line with certain conditions. Basically I would like to have the line colored red when pointing down on the y axis, green when pointing up and blue when neither.
Creating a dynamic choice field
I’m having some trouble trying to understand how to create a dynamic choice field in django. I have a model set up something like:
binning data in python with scipy/numpy
is there a more efficient way to take an average of an array in prespecified bins? for example, i have an array of numbers and an array corresponding to bin start and end positions in that array, and I want to just take the mean in those bins? I have code that does it below but i am wondering how it can be cut down and improved. thanks.
How do chained assignments work?
A quote from something: