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Return multiple columns from pandas apply()
...nswer: the argument passed in to the function, also affects performance.
(Python 3.7.4, Pandas 1.0.3)
import pandas as pd
import locale
import timeit
def create_new_df_test():
df_test = pd.DataFrame([
{'dir': '/Users/uname1', 'size': 994933},
{'dir': '/Users/uname2', 'size': 1093...
Erasing elements from a vector
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STL 'idioms' like this make me use Python for small projects.
– Johannes Overmann
Jun 25 '13 at 15:28
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How to find and return a duplicate value in array
...code for some huge scaling data (and if so, you can actually just use C or Python), the provided answer is far more elegant/readable, and isnt' going to run that much slower compared to a linear time solution. furthermore, in theory, the linear time solution requires linear space, which may not be a...
What is the JavaScript convention for no operation?
What is the JavaScript convention for no operation? Like a Python pass command.
6 Answers
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How to share my Docker-Image without using the Docker-Hub?
...cker save: when I push an image that derives from another image (let's say python:2.7) to a registry, the parent image doesn't need to be uploaded more than once unless it changes. Can I save partial images to achieve a similar file size optimization? I'm jumping through these hoops because I'm a ho...
Efficiently updating database using SQLAlchemy ORM
...sh()).
I've found that at times doing a large query and then iterating in python can be up to 2 orders of magnitude faster than lots of queries. I assume that iterating over the query object is less efficient than iterating over a list generated by the all() method of the query object.
[Please no...
Using an ORM or plain SQL? [closed]
...e been writing plain SQL, primarily for MySQL. Though I have used ORMs in python like SQLAlchemy , I didn't stick with them for long. Usually it was either the documentation or complexity (from my point of view) holding me back.
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How to create a remote Git repository from a local one?
...suming you have already setup and used git using ssh keys, I wrote a small Python script, which when executed from a working directory will set up a remote and initialize the directory as a git repo. Of course, you will have to edit script (only once) to tell it server and Root path for all reposito...
difference between socket programming and Http programming
... What do you mean by language? A java application can communicate with a Python application via sockets for example
– Adam Hughes
Sep 7 '17 at 14:34
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Simultaneously merge multiple data.frames in a list
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Another question provides a python implementation: list of pandas data frames dfs = [df1, df2, df3] then reduce(pandas.merge, dfs).
– Paul Rougieux
Mar 18 '19 at 13:45
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