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Adding a Method to an Existing Object Instance
I've read that it is possible to add a method to an existing object (i.e., not in the class definition) in Python.
16 Answ...
How do I get a list of all the duplicate items using pandas in python?
... IDs in duplicated:
>>> import pandas as pd
>>> df = pd.read_csv("dup.csv")
>>> ids = df["ID"]
>>> df[ids.isin(ids[ids.duplicated()])].sort("ID")
ID ENROLLMENT_DATE TRAINER_MANAGING TRAINER_OPERATOR FIRST_VISIT_DATE
24 11795 27-Feb-12 ...
Explain the use of a bit vector for determining if all characters are unique
...ify the size in constructor.
API. With bit vectors you will have easier to read code, probably something like this:
vector.SetFlag(4, true); // set flag at index 4 as true
for int you will have lower-level bit logic code:
checker |= (1 << 5); // set flag at index 5 to true
Also probably i...
How to get the input from the Tkinter Text Widget?
..._Box.get("1.0",END)
The first part, "1.0" means that the input should be read from line one, character zero (ie: the very first character). END is an imported constant which is set to the string "end". The END part means to read until the end of the text box is reached. The only issue with this is...
Profiling Django
...ime they take. It's a really useful, powerful and easy to use tool.
Also, read recommendations about Django performance in Database access optimization from the documentation.
And Django performance tips by
Jacob Kaplan-Moss.
...
lexers vs parsers
...
What parsers and lexers have in common:
They read symbols of some alphabet from their input.
Hint: The alphabet doesn't necessarily have to be of letters. But it
has to be of symbols which are atomic for the language
understood by parser/lexer.
Symbols for the lexer: ...
MySQL: @variable vs. variable. What's the difference?
...
@Pacerier: Am I reading the docs wrong? """To indicate explicitly that a variable is a session variable, precede its name by SESSION, @@session., or @@."""
– RobM
Apr 25 '15 at 16:32
...
When to use static vs instantiated classes
...believe is the overly-complicated sounding term for this. LOTS and lots of reading on it all over SO and google-land. As far as "singletons" go, here is something that really made me think: slideshare.net/go_oh/… A talk on why PHP singletons really don't make any sense. Hope this contributes a lit...
Reducing Django Memory Usage. Low hanging fruit?
... @Tiago: apache is good when you have a lot of apache virtual hosts already in place, using SSL with apache already, etc. In this case, use mod_wsgi. If you are starting afresh, use spawning. NEVER use mod_python.
– nosklo
Jan 29 '09 at 10:23
...
Ubuntu rails install fails on zlib
...t doesn't work ... something about zLib not found crap ...
So, I actually READ the README and find that I need to edit a file ...
[my ruby source directory]/ext/Setup
and UN-COMMENT the line with zLib in it ... by removing the "#" in the first column
Then I run the commands again ... included h...