Selecting from Python lists using values rather than indices
Date : March 29 2020, 07:55 AM
should help you out Let's say that I have a tuple: , Yes you can: [v for v in aList if v in ['d', 'e', 'f']]
[v for v in aList if v in 'def']
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Excluding email lists while selecting specific values at once
Tag : mysql , By : user147496
Date : March 29 2020, 07:55 AM
Does that help When possible you should use NOT IN instead of NOT EXISTS. This should be faster: BEGIN
CREATE TABLE `mytable` AS (
SELECT Email FROM `anothertable` A
WHERE Email NOT IN (SELECT Email FROM `optout`)
AND Email NOT IN (SELECT emailbounced FROM `allbounced`)
GROUP BY Email
HAVING
(SUM(CASE WHEN target = 'M' THEN 1 ELSE 0 END) > 0 OR -- MAN is present
SUM(CASE WHEN target = 'W' THEN 1 ELSE 0 END) > 0 AND -- WOMAN is present
SUM(CASE WHEN target NOT IN ('M', 'W') THEN 1 ELSE 0 END) = 0) -- only MAN or WOMAN
);
END
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Selecting single values from pandas dataframe using lists
Date : November 04 2020, 03:01 PM
I wish did fix the issue. you can use DataFrame.lookup(): In [6]: pd.Series(df.lookup(df.index, df.columns), index=df.columns)
Out[6]:
A 0
B 4
C 8
dtype: int32
In [14]: pd.Series(df.lookup(ind, cols), index=df.columns)
Out[14]:
A 0
B 4
C 8
dtype: int32
In [12]: df.lookup(df.index, df.columns)
Out[12]: array([0, 4, 8])
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Selecting values with Pandas multiindex using lists of tuples
Date : March 29 2020, 07:55 AM
will be helpful for those in need The list of tuples is not the problem. The fact that each tuple does not correspond to a single index is the problem (Since a list isn't a valid key). If you want to index a Dataframe like this, you need to expand the lists inside each tuple to their own entries. d = [
{
'id': 0,
'foo': [1],
'bar': ['a', 'b']
},
{
'id': 3,
'foo': [2],
'bar': ['a', 'b']
},
{
'id': 7,
'foo': [1, 2],
'bar': ['a']
},
]
all_idx = [
(el['id'], i, j)
for el in d
for i in el['foo']
for j in el['bar']
]
# [(0, 1, 'a'), (0, 1, 'b'), (3, 2, 'a'), (3, 2, 'b'), (7, 1, 'a'), (7, 2, 'a')]
df.loc[all_idx].groupby(level=0).sum()
col1
id
0 -0.225873
3 -3.048268
7 -1.315756
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How to make charts/graphs (such as line graphs, bar graphs, circle graphs), etc. in C++, Qt, QML, Blackberry 10 Cascades
Date : March 29 2020, 07:55 AM
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