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sys.argv[1] meaning in script
...more tutorial level.
For every invocation of Python, sys.argv is automatically a list of strings representing the arguments (as separated by spaces) on the command-line. The name comes from the C programming convention in which argv and argc represent the command line arguments.
You'll want to lea...
MongoDB atomic “findOrCreate”: findOne, insert if nonexistent, but do not update
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How to select rows from a DataFrame based on column values?
...t. For your question, you could do df.query('col == val')
Reproduced from http://pandas.pydata.org/pandas-docs/version/0.17.0/indexing.html#indexing-query
In [167]: n = 10
In [168]: df = pd.DataFrame(np.random.rand(n, 3), columns=list('abc'))
In [169]: df
Out[169]:
a b ...
Delete column from pandas DataFrame
...
This answer isn't really correct - the pandas developers didn't, but that doesn't mean it is hard to do.
– wizzwizz4
Sep 30 '17 at 9:42
...
Best practice: PHP Magic Methods __set and __get [duplicate]
...magic methods.
This was a mistake, the last part of your question says it all :
this is slower (than getters/setters)
there is no auto-completion (and this is a major problem actually), and type management by the IDE for refactoring and code-browsing (under Zend Studio/PhpStorm this can be handle...
General guidelines to avoid memory leaks in C++ [closed]
... programs? How do I figure out who should free memory that has been dynamically allocated?
29 Answers
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How to plot two columns of a pandas data frame using points?
...
You can specify the style of the plotted line when calling df.plot:
df.plot(x='col_name_1', y='col_name_2', style='o')
The style argument can also be a dict or list, e.g.:
import numpy as np
import pandas as pd
d = {'one' : np.random.rand(10),
'two' : np.random.rand(...
How to remove specific value from array using jQuery
...y, function(value) {
return value != removeItem;
});
Result:
[1, 3]
http://snipplr.com/view/14381/remove-item-from-array-with-jquery/
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What is the difference between char s[] and char *s?
...puts the literal string in read-only memory and copies the string to newly allocated memory on the stack. Thus making
s[0] = 'J';
legal.
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MySQL get the date n days ago as a timestamp
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