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Creating Multifield Indexes in Mongoose / MongoDB
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Numpy index slice without losing dimension information
...Joe Kington
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Pandas dataframe get first row of each group
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248
>>> df.groupby('id').first()
value
id
1 first
2 first
3 first
4 ...
Getting list of lists into pandas DataFrame
...aders)
df
Heading1 Heading2
0 1 2
1 3 4
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How do you pass arguments to define_method?
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finding and replacing elements in a list
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>>> a= [1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1]
>>> for n, i in enumerate(a):
... if i == 1:
... a[n] = 10
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>>> a
[10, 2, 3, 4, 5, 10, 2, 3, 4, 5, 10]
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how to mysqldump remote db from local machine
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How to randomize (or permute) a dataframe rowwise and columnwise?
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234
Given the R data.frame:
> df1
a b c
1 1 1 0
2 1 0 0
3 0 1 0
4 0 0 0
Shuffle row-wise:
&...
How to switch position of two items in a Python list?
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404
i = ['title', 'email', 'password2', 'password1', 'first_name',
'last_name', 'next', 'new...