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How to add a new row to an empty numpy array
...append(arr, np.array([[1,2,3]]), axis=0)
arr = np.append(arr, np.array([[4,5,6]]), axis=0)
But, @jonrsharpe is right. In fact, if you're going to be appending in a loop, it would be much faster to append to a list as in your first example, then convert to a numpy array at the end, since you're re...
How to load a tsv file into a Pandas DataFrame?
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Note: As of 17.0 from_csv is discouraged: use pd.read_csv instead
The documentation lists a .f...
Custom Python list sorting
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edited Feb 5 '15 at 17:33
Charlie
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answered Aug ...
What do (lambda) function closures capture?
...: b + a)(i)
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>>> adders[1](3)
4
>>> adders[2](3)
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The scope here is created using a new function (a lambda, for brevity), which binds its argument, and passing the value you want to bind as the argument. In real code, though, you most likely will have an ordinary functio...
Compare integer in bash, unary operator expected
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Your problem arises from the fact that $i has a blank value when your statement fails. Always q...
How would I get a cron job to run every 30 minutes?
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edited Sep 27 '11 at 13:45
Tim Cooper
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answ...
Converting a column within pandas dataframe from int to string
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Rails: Check output of path helper from console
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Counting occurrences in Vim without marking the buffer changed
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If you've already performed a search using /, it becomes just :%s///gn
– Peter Gibson
Jun 18 '09 at ...
How long is the SHA256 hash?
I'm going to run SHA256 on a password + salt, but I don't know how long to make my VARCHAR when setting up the MySQL database. What is a good length?
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