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fix: issue#915, Error for large integers in Series #1233

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fix: issue#915, Error for large integers in Series #1233

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0fabbf7
fix: issue#915 error for large integers
Sohaib90 Jan 5, 2023
56e102a
fix: issue#915 added histogram_bin_egdes with max_bins
Sohaib90 Jan 5, 2023
21d8042
fix: issue#915 lint issues
Sohaib90 Jan 24, 2023
3da095e
Merge branch 'develop' into issue915
Sohaib90 Jan 24, 2023
628493e
Merge branch 'develop' into issue915
Sohaib90 Jan 24, 2023
78cfb30
fix: issue#915 flake8 errors
Sohaib90 Jan 24, 2023
e689665
fix: issue#915 bin args
Sohaib90 Jan 24, 2023
6a5409e
fix: issue#915 rename var bin_args
Sohaib90 Jan 24, 2023
0f66735
Merge branch 'develop' into issue915
Sohaib90 Jan 24, 2023
01c2677
Merge branch 'develop' into issue915
Sohaib90 Jan 26, 2023
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9 changes: 6 additions & 3 deletions src/pandas_profiling/model/summary_algorithms.py
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Original file line number Diff line number Diff line change
Expand Up @@ -36,11 +36,13 @@ def histogram_compute(
stats = {}
bins = config.plot.histogram.bins
bins_arg = "auto" if bins == 0 else min(bins, n_unique)
stats[name] = np.histogram(finite_values, bins=bins_arg, weights=weights)
bins = np.histogram_bin_edges(finite_values, bins=bins_arg)
stats[name] = np.histogram(finite_values, bins=bins, weights=weights)
Comment on lines +39 to +40
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interesting solution, but still seems to behave a bit weirdly with big numbers

> import numpy as np
> arr = np.array([716277643516076032 + i for i in range(100)])
> bins = np.histogram_bin_edges(arr, bins=5)
> np.histogram(arr, bins=bins)
(array([ 0,  0, 65,  0, 35]),
 array([7.16277644e+17, 7.16277644e+17, 7.16277644e+17, 7.16277644e+17,
        7.16277644e+17, 7.16277644e+17]))

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True, it is still not evenly distributed like it should be for smaller numbers. What do you propose here? Leaving np.histogram_bin_edges raises an error for larger numbers. Is it better to raise error than have weird behavior?

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Thinking from a user's perspective, for me is better to have an error being raised than an incorrect plot. If I know that there was a problem with the large integers I can preprocess that column and run again, but an incorrect result may lead me to an incorrect interpretation of my data distribution.

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@Sohaib90 Sohaib90 Jan 26, 2023 •
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Yeah, that is what I was thinking as well. I think I should make the changes so that it leads to raising an error rather than making an incorrect plot, right?

Also there is a check Codacy Static Code Analysis that is failing. I think that is a new one


max_bins = config.plot.histogram.max_bins
if bins_arg == "auto" and len(stats[name][1]) > max_bins:
stats[name] = np.histogram(finite_values, bins=max_bins, weights=None)
bins = np.histogram_bin_edges(finite_values, bins=max_bins)
stats[name] = np.histogram(finite_values, bins=bins, weights=None)

return stats

Expand All @@ -49,7 +51,8 @@ def chi_square(
values: Optional[np.ndarray] = None, histogram: Optional[np.ndarray] = None
) -> dict:
if histogram is None:
histogram, _ = np.histogram(values, bins="auto")
bins = np.histogram_bin_edges(values, bins="auto")
histogram, _ = np.histogram(values, bins=bins)
return dict(chisquare(histogram)._asdict())


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33 changes: 33 additions & 0 deletions tests/issues/test_issue915.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,33 @@
"""
Test for issue 915:
https://github.com/ydataai/pandas-profiling/issues/915

Error for series with large integers.
"""
import fnmatch

import pandas as pd

from pandas_profiling import ProfileReport


def test_issue915():
df = pd.DataFrame({"col": pd.Series([716277643516076032 + i for i in range(100)])})
df_profile = ProfileReport(df)

def test_with_value(n_extreme_obs):
"""Generate HTML and validate the tabs contain the proper tab titles."""
df_profile.config.n_extreme_obs = n_extreme_obs
df_profile.invalidate_cache()

reg_min = f"*<a href=* aria-controls=* role=tab data-toggle=tab>Minimum {n_extreme_obs} values</a>*"
reg_max = f"*<a href=* aria-controls=* role=tab data-toggle=tab>Maximum {n_extreme_obs} values</a>*"

profile_html = df_profile.to_html()

assert fnmatch.fnmatch(profile_html, reg_min)
assert fnmatch.fnmatch(profile_html, reg_max)

test_with_value(5)
test_with_value(100)
test_with_value(120)