Issue with lookup('dig') not finding 'dnspython' Question: On a Red Hat 8.3 machine I try to use this ansible code: – debug: msg: "{{ lookup(‘dig’, ‘localhost’) }}" But I get an error: TASK***************************************** fatal: [demo.example.com]: FAILED! => {"msg": "An unhandled exception occurred while running the lookup plugin ‘dig’. Error was a <class ‘ansible.errors.AnsibleError’>, original message: …
How to simplify repetitive try-except blocks Question: I have the below code that needs to check if the visible property of any of the objects are found. Each of the acronym functions in the try-except blocks return an object reference if found, each with their own visible property. If any of the acronym objects are …
Look-up based objective function in Cvxpy Question: I’d like to define an objective function based on a lookup table. As an example, we have an integer programming problem (binary) where we can pick one or more actions from a set of actions. Our cvxpy.Variable is: element_vars = [1, 0, 0, 1] (p.s. element_vars is a …
Pandas Lookup to be deprecated – elegant and efficient alternative Question: The Pandas lookup function is to be deprecated in a future version. As suggested by the warning, it is recommended to use .melt and .loc as an alternative. df = pd.DataFrame({‘B’: [‘X’, ‘X’ , ‘Y’, ‘X’, ‘Y’, ‘Y’, ‘X’, ‘X’, ‘Y’, ‘Y’, ‘X’, ‘Y’], …
How to understand code of "Exercise 40: Dictionaries .." in Learn Python The Hard Way Question: I’m trying to follow along with Exercise 40 from Learn Python The Hard Way, 2nd edition", by Zed A. Shaw. The last snippet of code sets up two dictionaries like so: states = { ‘Oregon’: ‘OR’, ‘Florida’: ‘FL’, ‘California’: …
Efficiently processing ~50 million record file in python Question: We have a file with about 46 million records in CSV format. Each record has about 18 fields and one of them is a 64 byte ID. We have another file with about 167K unique IDs in it. The records corresponding to the IDs needs to …
pandas loc vs. iloc vs. at vs. iat? Question: Recently began branching out from my safe place (R) into Python and and am a bit confused by the cell localization/selection in Pandas. I’ve read the documentation but I’m struggling to understand the practical implications of the various localization/selection options. Is there a reason why I …
How can I add new keys to a dictionary? Question: How do I add a key to an existing dictionary? It doesn’t have an .add() method. Asked By: lfaraone || Source Answers: dictionary[key] = value Answered By: Jason Creighton You create a new key/value pair on a dictionary by assigning a value to that key …
