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How to convert list of key-value tuples into dictionary?
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answered Jul 5 '11 at 17:28
ninjageckoninjagecko
72.5k2121 gold badges124124 silver badges134134 bronze badges
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How do you split a list into evenly sized chunks?
... yield lst[i:i + n]
import pprint
pprint.pprint(list(chunks(range(10, 75), 10)))
[[10, 11, 12, 13, 14, 15, 16, 17, 18, 19],
[20, 21, 22, 23, 24, 25, 26, 27, 28, 29],
[30, 31, 32, 33, 34, 35, 36, 37, 38, 39],
[40, 41, 42, 43, 44, 45, 46, 47, 48, 49],
[50, 51, 52, 53, 54, 55, 56, 57, 58, 59],
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Python assigning multiple variables to same value? list behavior
... are naming the same object, use the is operator:
>>> a=b=c=[0,3,5]
>>> a is b
True
You then ask:
what is different from this?
d=e=f=3
e=4
print('f:',f)
print('e:',e)
Here, you're rebinding the name e to the value 4. That doesn't affect the names d and f in any way.
I...
Stack vs heap allocation of structs in Go, and how they relate to garbage collection
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5 Answers
5
Active
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How to scale SVG image to fill browser window?
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175
How about:
html, body { margin:0; padding:0; overflow:hidden }
svg { position:fixed; top:0; bot...
Append a NumPy array to a NumPy array
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In [1]: import numpy as np
In [2]: a = np.array([[1, 2, 3], [4, 5, 6]])
In [3]: b = np.array([[9, 8, 7], [6, 5, 4]])
In [4]: np.concatenate((a, b))
Out[4]:
array([[1, 2, 3],
[4, 5, 6],
[9, 8, 7],
[6, 5, 4]])
or this:
In [1]: a = np.array([1, 2, 3])
In [2]: b = ...
Run Cron job every N minutes plus offset
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529
To run a task every 20 minutes starting at 5 past the hour, try this:
5-59/20 * * * *
Expl...
Matplotlib transparent line plots
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edited May 15 '15 at 14:39
ASGM
8,6282424 silver badges4545 bronze badges
answered Mar 14 ...
Python module os.chmod(file, 664) does not change the permission to rw-rw-r— but -w--wx----
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edited Feb 4 '15 at 13:02
community wiki
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Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
..., 'b': [2,3,4]})
In [4]: df
Out[4]:
a b
0 1 2
1 2 3
2 3 4
In [5]: df["A1"], df["A2"] = zip(*df["a"].map(calculate))
In [6]: df
Out[6]:
a b A1 A2
0 1 2 2 3
1 2 3 4 6
2 3 4 6 9
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