How to melt 2 columns at the same time?
In Pandas, I have the following data frame:
Python
Accessing JSON elements
I am getting the weather information from a URL.
why can’t I change only a single element in a nested list in Python
I just met something really strange of Python: >>> out=[[0]*3]*3 >>> out [[0, 0, 0], [0, 0, 0], [0, 0, 0]] >>> out[0][1] 0 >>> out[0][1]=9 >>> out [[0, 9, 0], [0, 9, 0], [0, 9, 0]] well, obviously, what I want is : [[0, 9, 0], [0, 0, 0], [0, 0, 0]] isn’t strange? … Read more
How to find the min/max value of a common key in a list of dicts?
I have a list of dictionaries like so:
Integrate Python And C++
I’m learning C++ because it’s a very flexible language. But for internet things like Twitter, Facebook, Delicious and others, Python seems a much better solution.
How to convert an int to a hex string?
I want to take an integer (that will be <= 255), to a hex string representation
Extract int from string in Pandas
Lets say I have a dataframe df as
How to create module-wide variables in Python?
…
UnboundLocalError: local variable ‘DBNAME‘ referenced before assignment
…
Sparse matrix slicing using list of int
I’m writing a machine learning algorithm on huge & sparse data (my matrix is of shape (347, 5 416 812 801) but very sparse, only 0.13% of the data is non zero.
Django: How to manage development and production settings?
I have been developing a basic app. Now at the deployment stage it has become clear I have need for both a local settings and production settings.