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Python - Create list with numbers between 2 values?
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Use range. In Python 2.x it returns a list so all you need is:
>>> range(11, 17)
[11, 12, 13, 14, 15, 16]
In Python 3.x range is a iterator. So, you need to convert it to a list:
>>> list(range(11, 17))
[11,...
Is there a NumPy function to return the first index of something in an array?
... list using a list comprehension: [find_list.index(index_list[i]) for i in range(len(index_list))]
– Matt Wenham
Apr 29 '19 at 21:24
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Concatenating two one-dimensional NumPy arrays
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],
labels=["r_", "stack+reshape", "hstack", "concatenate"],
n_range=[2 ** k for k in range(19)],
xlabel="len(a)",
)
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Can you add new statements to Python's syntax?
...g step. eg.
# coding: mylang
myprint "this gets logged to file"
for i in range(10):
myprint "so does this : ", i, "times"
myprint ("works fine" "with arbitrary" + " syntax"
"and line continuations")
Caveats:
There are problems to the preprocessor approach, as you'll probably be familiar ...
What is a plain English explanation of “Big O” notation?
...put is at least that long (e.g. printing out all permutations (ways to rearrange) a set of N playing cards is factorial: O(N!)).
This motivates the use of data structures: a data structure requires reading the data only once (usually O(N) time), plus some arbitrary amount of preprocessing (e.g. O(N...
Pythonic way to find maximum value and its index in a list?
...import random; import operator;"
"l = [random.random() for _ in xrange(100)]")
print "Explicit: %.2f usec/pass" % (1000000 * t.timeit(number=100000)/100000)
t = Timer("implicit(l)", "from __main__ import explicit, implicit; "
"import random; import operator;"
"...
Evaluating a mathematical expression in a string
...d))
else:
raise TypeError(node)
You can easily limit allowed range for each operation or any intermediate result, e.g., to limit input arguments for a**b:
def power(a, b):
if any(abs(n) > 100 for n in [a, b]):
raise ValueError((a,b))
return op.pow(a, b)
operators[as...
How to list branches that contain a given commit?
...cent commit on the master/foo branch (HEAD)... you can't do an A..B commit range, just dont use a range like so:: git log HEAD --oneline -1 > 82c12a9 (HEAD, origin/remote-branch-name, origin/master, origin/dev, origin/HEAD, master, dev) commit message.
– Devin G Rhode
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onchange event on input type=range is not triggering in firefox while dragging
When I played with <input type="range"> , Firefox triggers an onchange event only if we drop the slider to a new position where Chrome and others triggers onchange events while the slider is dragged.
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Python dictionary: Get list of values for list of keys
...d
l = nprnd.randint(1000, size=10000)
m = dict([(_, nprnd.rand()) for _ in range(1000)])
from operator import itemgetter
import operator
f = operator.itemgetter(*l)
%timeit f(m)
%timeit list(itemgetter(*l)(m))
%timeit [m[_] for _ in l] # list comprehension
%timeit map(m.__getitem__, l)
%timeit list...