大约有 5,685 项符合查询结果（耗时：0.0189秒） [XML]
How to listen for changes to a MongoDB collection?
...getNext();
print_r($doc);
} else {
sleep(1);
}
}
Python (by Robert Stewart)
from pymongo import Connection
import time
db = Connection().my_db
coll = db.my_collection
cursor = coll.find(tailable=True)
while cursor.alive:
try:
doc = cursor.next()
print ...
Numpy how to iterate over columns of array?
...
It doesn't look pythonic to me.
– gronostaj
Apr 30 '14 at 16:22
...
MySQL, better to insert NULL or empty string?
...eep in mind is that NULL might make your codepaths much more difficult. In Python for example most database adapters / ORMs map NULL to None.
So things like:
print "Hello, %(title)s %(firstname) %(lastname)!" % databaserow
might result in "Hello, None Joe Doe!" To avoid it you need something li...
Matplotlib 2 Subplots, 1 Colorbar
...
As a beginner who stumbled across this thread, I'd like to add a python-for-dummies adaptation of abevieiramota's very neat answer (because I'm at the level that I had to look up 'ravel' to work out what their code was doing):
import numpy as np
import matplotlib.pyplot as plt
fig, ((ax1...
What is the fastest or most elegant way to compute a set difference using Javascript arrays?
... later, with ES6's Set object it's quite easy (but still not as compact as python's A - B), and reportedly faster than indexOf for large arrays:
console.clear();
let a = new Set([1, 2, 3, 4]);
let b = new Set([5, 4, 3, 2]);
let a_minus_b = new Set([...a].filter(x => !b.has(x)));
let ...
float64 with pandas to_csv
... programmer. This article below clarifies a bit this subject:
http://docs.python.org/2/tutorial/floatingpoint.html
A classic one-liner which shows the "problem" is ...
>>> 0.1 + 0.1 + 0.1
0.30000000000000004
... which does not display 0.3 as one would expect. On the other hand, if you...
Hidden Features of PHP? [closed]
...used all over the place which results in good CPU cache locality. Perl and Python both use separate language constructs for lists and maps resulting in more copying and potentially confusing transformations.
share
...
`if __name__ == '__main__'` equivalent in Ruby
...rom a module that contains a tool I want to continue using separately. In Python I would simply do this:
3 Answers
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UnicodeEncodeError: 'latin-1' codec can't encode character
...
I ran into this same issue when using the Python MySQLdb module. Since MySQL will let you store just about any binary data you want in a text field regardless of character set, I found my solution here:
Using UTF8 with Python MySQLdb
Edit: Quote from the above URL...
Pandas - Get first row value of a given column
...['bar'] = 100
In [25]: df['bar'].iloc[0] = 99
/home/unutbu/data/binky/bin/ipython:1: SettingWithCopyWarning:
A value is trying to be set on a copy of a slice from a DataFrame
See the caveats in the documentation: http://pandas.pydata.org/pandas-docs/stable/indexing.html#indexing-view-versus-copy
...