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cv2.imshow command doesn't work properly in opencv-python
I'm using opencv 2.4.2, python 2.7
The following simple code created a window of the correct name, but its content is just blank and doesn't show the image:
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Issue with virtualenv - cannot activate
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I don't see this "venv" directory after installing Python 2.7 on Windows. Advice? I went to Blairg23's link, but do not see an "activate" script in my Python "Scripts" directory.
– ryanwebjackson
Oct 3 '17 at 2:16
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Why is the order in dictionaries and sets arbitrary?
...d 'bar', for example, and lets assume the table size is 8 slots. In Python 2.7, hash('foo') is -4177197833195190597, hash('bar') is 327024216814240868. Modulo 8, that means these two keys are slotted in slots 3 and 4 then:
>>> hash('foo')
-4177197833195190597
>>> hash('foo') % 8
3...
Append values to a set in Python
..._set |= {2}
>>> my_set
{1, 2}
Note: In versions prior to Python 2.7, use set([...]) instead of {...}.
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Adding dictionaries together, Python [duplicate]
...**dic1)
In some cases it may be handy to use dict comprehensions (Python 2.7 or newer),Especially if you want to filter out or transform some keys/values at the same time.
ndic = {k: v for d in (dic0, dic1) for k, v in d.items()}
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Creating a JSON response using Django and Python
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With python 2.7, it should just be "import json"
– Cullen Fluffy Jennings
Sep 6 '12 at 22:22
1
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How Python web frameworks, WSGI and CGI fit together
... URL is outdated, I think this is updated one: docs.python.org/2.7/howto/webservers.html
– Stefaan
Feb 21 '18 at 16:11
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How to sort a list of strings numerically?
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when I try key=int in 2.7 I get None
– KI4JGT
Jan 28 '13 at 5:48
1
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Alphabet range in Python
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In Python 2.7 and 3 you can use this:
import string
string.ascii_lowercase
'abcdefghijklmnopqrstuvwxyz'
string.ascii_uppercase
'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
As @Zaz says:
string.lowercase is deprecated and no longer works in Python ...
Convert floating point number to a certain precision, and then copy to string
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With Python < 3 (e.g. 2.6 [see comments] or 2.7), there are two ways to do so.
# Option one
older_method_string = "%.9f" % numvar
# Option two
newer_method_string = "{:.9f}".format(numvar)
But note that for Python versions above 3 (e.g. 3.2 or 3.3), option two is p...