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Threading pool similar to the multiprocessing Pool?
...port ThreadPool
It is implemented using a dummy Process class wrapping a python thread. This thread-based Process class can be found in multiprocessing.dummy which is mentioned briefly in the docs. This dummy module supposedly provides the whole multiprocessing interface based on threads.
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Using sed, how do you print the first 'N' characters of a line?
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@fedorqui -r is apparently available on Linux, but not on Mac.
– Paul Tomblin
Mar 25 '16 at 0:17
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Does Flask support regular expressions in its URL routing?
....randomify = randomify
self.regex = '(?:yes|no|maybe)'
def to_python(self, value):
if value == 'maybe':
if self.randomify:
return not randrange(2)
raise ValidationError()
return value == 'yes'
def to_url(self, value):
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How to validate an email address using a regular expression?
...ex library used e.g. in PHP) can correctly parse RFC 5322 without a hitch. Python and C# can do that too, but they use a different syntax from those first two. However, if you are forced to use one of the many less powerful pattern-matching languages, then it’s best to use a real parser.
It's als...
Exploring Docker container's file system
...ere is no shell you can install it - for instance in dockerfile for alpine linux (which indeed doesn't have shell) by: RUN apk update && apk add bash (size: ~4MB)
– Kamil Kiełczewski
May 11 '17 at 18:55
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Best way to assert for numpy.array equality?
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@RamonMartinez if you use Python's unittest you can use self.assertIsNone(np.testing.assert_array_equal(a, b)) as it returns None if the arrays are equal.
– mjkrause
Nov 11 '19 at 0:25
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How do I implement __getattribute__ without an infinite recursion error?
...ion of __getattribute__ you avoid the recursive hell you were in before.
Ipython output with code in foo.py:
In [1]: from foo import *
In [2]: d = D()
In [3]: d.test
Out[3]: 0.0
In [4]: d.test2
Out[4]: 21
Update:
There's something in the section titled More attribute access for new-style cla...
Remove all occurrences of a value from a list?
In Python remove() will remove the first occurrence of value in a list.
23 Answers
2...
Find the index of a dict within a list, by matching the dict's value
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IMHO this is not as readable or Pythonic is @Emile's answer. Because the intention is not really to create a generator (and using next() for this seems weird to me), the aim is just to get the index. Also, this raises StopIteration, whereas the Python lst.i...
What are some resources for getting started in operating system development? [closed]
... to do is develop my very own operating system (not necessarily fancy like Linux or Windows, but better than a simple boot loader which I've already done).
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