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Pandas Multicolumn .expanding()
2025-02-10 03:45:08
2045
The .expanding() function is super cool. It's order of magnitude faster than the obvious numpy alternative:import numpyi...
Pandas parquet docs clarification
2025-02-10 03:45:03
1529
Would someone please clarify what is meant by the description for the engine arg to DataFrame.to_parquet?engine : {‘auto...
Pandas Pandas Series.ne operator returning unexpected result against two slices of same Series
2025-02-10 03:44:58
2246
So I have this series of integers shown below from pandas import Series s = Series([1, 2, 3, 1, 2, 3, 1, 2, 3, 1, ...
Pandas "ValueError: Can only compare identically-labeled Series objects" when order of indicies is different
2025-02-10 03:44:53
896
I noticed that you cannot compare 2 pd.Series objects together when the orders aren't perfectly identical. Comment From:...
Pandas SettingWithCopyWaraning when modifying a column that is the aggregation of 2 others
2025-02-10 03:44:46
566
Code Sample, a copy-pastable example if possibledf = pd.DataFrame({'c1': [1, 2, 3], 'c2': [3, 4, 5]})df['c3'] = df['c1']...
Pandas SettingWithCopyWarning when modifying a column added to df after read_csv
2025-02-10 03:44:41
1093
Code Sample, a copy-pastable example if possible# Your code heredf = pd.read_csv('package_infos.csv')m = df.shape[0]df['...
Pandas pd.to_datetime errors args cause inconsistent behavior wrt to timestamp limitations
2025-02-10 03:44:34
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Code Sampledf = pd.DataFrame({"date": ['10000101', '20180220']})# Timestamp limitations correctly raise except...
Pandas read_json should support usecols option (or hook for arbitrary transformation after each line is read)
2025-02-10 03:44:29
3527
Code Sample, a copy-pastable example if possibleimport pandas as pdpd.read_json(path_to_big_file, lines=True, usecols=so...
Pandas Index formatting in online reference
2025-02-10 03:44:24
1041
The tree index for the online reference is wrongly formatted on the page: as the tree column is not wide enough, most te...
Pandas Series.add(fill_value=0) changes int dtype to float
2025-02-10 03:44:16
685
Code Sampleimport pandas as pdpd.Series([1,2,3]).add(pd.Series([100]), fill_value=0)Problem descriptionThe resulting dty...
Pandas Failure to identify NaNs as equal in pandas.DataFrame.equals() method (as it should)
2025-02-10 03:44:11
7012
Code to replicate problemPlease see this link to download the referenced files.df = pd.read_pickle('bug_df.pickle')df2 =...
Pandas Suggestion: Temporary Variable in Pandas Data Frame
2025-02-10 03:44:06
3654
Temporary VariablesWhile dealing with data in real world, its noted that level of complexity is higher and it would be b...
Pandas Group by and bin data with respect to time
2025-02-10 03:44:01
2586
df.set_index('TIME').groupby(pd.TimeGrouper('180M'))or grouped = df.groupby(lambda x: x.hour)i am using this code to div...
Pandas Feature request: pandas.Series.gradient()
2025-02-10 03:43:56
411
Problem descriptionIt is common to difference a time series multiple times to stationarize it.I found surprinsing pandas...
Pandas df.sort_index() leaves us with df.index.is_lexsorted()==False
2025-02-10 03:43:51
2998
Code Sample, a copy-pastable example if possibled=pd.DataFrame( [ [1,2,3], [1,2,4], [2,3,5], ...
Pandas TST: add doc-strings for fixtures
2025-02-10 03:43:45
208
pytest --fixtures prints these out. so let's add doc-strings, then we can figure out if we have duplicates / consolidate...
Pandas unexpected timestamps behavior
2025-02-10 03:43:41
1626
If I run pd.to_datetime('now') == pd.to_datetime('now', utc=True)or pd.Timestamp('now', tz='utc') == pd.Timestamp('now')...
Pandas df.eval fails for Unary operation involving float32 column
2025-02-10 03:43:35
3526
Code Sample, a copy-pastable example if possibleimport pandas as pddf = pd.DataFrame({ 'Foo64': [1.2, 2.4, 7.24],})df...
Pandas can't subtract utc datetimes from datetime.utcnow()
2025-02-10 03:43:29
2389
Code Sample, a copy-pastable example if possible# Your code heredf = pd.DataFrame()df["time"] = pd.date_range(...
Pandas GroupBy.var() is computing sum of squares instead of variance / Returns NaN when there is only 1 instance
2025-02-10 03:43:24
802
Code Sample, a copy-pastable example if possible# returns 10.125df = pd.DataFrame({'id': [1, 1], 'val': [0.5, 5.0]})df.g...
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