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Plotting time in Python with Matplotlib
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x = [datetime.datetime.now() + datetime.timedelta(hours=i) for i in range(12)]
y = [i+random.gauss(0,1) for i,_ in enumerate(x)]
# plot
plt.plot(x,y)
# beautify the x-labels
plt.gcf().autofmt_xdate()
plt.show()
Resulting image:
Here's the same as a scatter plot:
import datetime
import ran...
How to raise a ValueError?
...print(contains('bababa', 'k'))
File "how-to-raise-a-valueerror.py", line 12, in contains
raise ValueError('could not find {} in {}'.format(char, char_string))
ValueError: could not find 'k' in 'bababa'
Update — A substantially simpler way
Wow! Here's a much more concise version—essentia...
Increment a database field by 1
...uld do the trick.
UPDATE mytable
SET logins = logins + 1
WHERE id = 12
Insert new row, or Update if already present:
If you would like to update a previously existing row, or insert it if it doesn't already exist, you can use the REPLACE syntax or the INSERT...ON DUPLICATE KEY UPDATE optio...
Redis is single-threaded, then how does it do concurrent I/O?
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answered May 8 '12 at 8:51
Didier SpeziaDidier Spezia
60.6k1010 gold badges156156 silver badges139139 bronze badges
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What is private bytes, virtual bytes, working set?
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edited May 23 '17 at 12:34
Community♦
111 silver badge
answered Dec 31 '09 at 18:11
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How to @link to a Enum Value using Javadoc
...et#EARTH style.
– Stevo Slavić
Feb 12 '12 at 17:46
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Debugging automatic properties
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Using Visual Studio 2008, 2010, 2012, 2013:
Go to the Breakpoint window
New -> Break at Function…
For the get, type: ClassName.get_Counter()
For the set, type: ClassName.set_Counter(int)
You'll get a "No Source Available" when the breakpoint is hit,...
Confusion between numpy, scipy, matplotlib and pylab
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129
No, pylab is part of matplotlib (in matplotlib.pylab) and tries to give you a MatLab like env...
Git: Pull from other remote
...gor Zevaka
67.1k2626 gold badges104104 silver badges124124 bronze badges
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How to set value of input text using jQuery
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edited May 16 '12 at 2:35
answered May 16 '12 at 2:22
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