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Plotting a list of (x, y) coordinates in python matplotlib
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Should I use a data.frame or a matrix?
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edited Aug 30 '17 at 0:12
answered Mar 1 '11 at 19:00
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psql: FATAL: Ident authentication failed for user “postgres”
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How to remove multiple indexes from a list at the same time? [duplicate]
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If you have an arbitrary collection of indexes, then:
indexes = [2, 3, 5]
for index in sorted(indexes, reverse=True):
del my_list[index]
Note that you need to delete them in reverse order so that you don't throw off the subsequent indexes.
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What regular expression will match valid international phone numbers?
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Efficient way to rotate a list in python
...method.
from collections import deque
items = deque([1, 2])
items.append(3) # deque == [1, 2, 3]
items.rotate(1) # The deque is now: [3, 1, 2]
items.rotate(-1) # Returns deque to original state: [1, 2, 3]
item = items.popleft() # deque == [2, 3]
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How do I install Python OpenCV through Conda?
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edited Jun 30 '17 at 10:00
Quanlong
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How to create abstract properties in python abstract classes
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How to print number with commas as thousands separators?
... commas as thousands separators. For example, I want to show the number 1234567 as 1,234,567 . How would I go about doing this? I have seen many examples on Google, but I am looking for the simplest practical way.
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