It used to be a required part of a package (old, pre-3.3 “regular package”, not newer 3.3+ “namespace package”). Here’s the documentation. Python defines two types of packages, regular packages and namespace packages. Regular packages are traditional packages as they existed in Python 3.2 and earlier. A regular package is typically implemented as a directory … Read more
zip is its own inverse! Provided you use the special * operator. The way this works is by calling zip with the arguments: … except the arguments are passed to zip directly (after being converted to a tu
Named tuples are basically easy-to-create, lightweight object types. Named tuple instances can be referenced using object-like variable dereferencing or the standard tuple syntax. They can be used similarly to struct or other common record types, except that they are immutable. They were added in Python 2.6 and Python 3.0, although there is a recipe for … Read more
Short Answer It’s boilerplate code that protects users from accidentally invoking the script when they didn’t intend to. Here are some common problems when the guard is omitted from a script: If you import the guardless script in another script (e.g. import my_script_without_a_name_eq_main_guard), then the second script will trigger the first to run at import … Read more
You have two pythons installed on your machine, one is the standard python that comes with Mac OSX and the second is the one you installed with ports (this is the one that has matplotlib installed in its library, the one that comes with macosx does not). Is the standard mac python and since it … Read more
Your install is failing because you don’t have the python development headers installed. You can do this through apt on ubuntu/debian with: for python3 use: For eventlet you might also need the libevent libraries installed so if you get an error talking about that you can install libevent with:
Matplotlib chooses Xwindows backend by default. You need to set matplotlib to not use the Xwindows backend. Add this code to the start of your script (before importing pyplot) and try again: Or add to .config/matplotlib/matplotlibrc line backend: Agg to use non-interactive backend. Or when connect to server use ssh -X remoteMachine command to use … Read more
A similar question might have been asked before, but I couldn’t find the exact one fitting to my problem. I want to group by a dataframe based on two columns. For exmaple to make this Into this: Meaning that summation on “quantity” column for same “id” and same “product”.
I’ve seen other posts talking about this but anyone of these can help me. I am using jupyter notebook with Python 3.6.0 on windows x6 machine. I have a large dataset but I keep only a piece of it to run my models: This is a piece of code that i used: When I run … Read more
For Python 2.6 and later and Python 3.x: For Python 2.5 and earlier, use: