Implement dot() for Series

[itholic]

https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.dot.html#pandas.Series.dot

>>> s = ks.Series([0, 1, 2, 3])
>>> other = ks.Series([-1, 2, -3, 4])

>>> s.dot(other)
8

>>> s @ other
8

>>> df = ks.DataFrame([[0, 1], [-2, 3], [4, -5], [6, 7]])
>>> s.dot(df)
0    24
1    14
Name: 0, dtype: int64

[softagram-bot]

Softagram Impact Report for pull/1136 (head commit: a65f1b6)

⚠️ Copy paste found

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment on line 601 shared with ../test_series.py:

        # for MultiIndex
        midx = pd.MultiIndex([['lama', 'cow', 'falcon'],
                              ['speed', 'weight', 'length']],
                             ...(truncated 201 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment on line 604 shared with ../test_series.py:

                              ['speed', 'weight', 'length']],
                             [[0, 0, 0, 1, 1, 1, 2, 2, 2],
                      ...(truncated 149 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment on line 601 shared with ../test_series.py:

        # for MultiIndex
        midx = pd.MultiIndex([['lama', 'cow', 'falcon'],
                              ['speed', 'weight', 'length']],
                             ...(truncated 169 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment inside the same file on lines 541, 686:

                       repr(kdf1.where(kdf2 > 100).sort_index()))

        pdf1 = pd.DataFrame({'A': [-1, -2, -3, -4, -5], 'B': [-100, -200, -300, ...(truncated 174 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment inside the same file on lines 558, 705:

                       repr(kdf1.mask(kdf2 < 100).sort_index()))

        pdf1 = pd.DataFrame({'A': [-1, -2, -3, -4, -5], 'B': [-100, -200, -300, -4...(truncated 172 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment inside the same file on lines 549, 695:

                       repr(kdf1.where(kdf2 < -250).sort_index()))

    def test_mask(self):
        pdf1 = pd.DataFrame({'A': [0, 1, 2, 3, 4], 'B...(truncated 195 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment inside the same file on lines 687, 706:

        pdf1 = pd.DataFrame({'A': [-1, -2, -3, -4, -5], 'B': [-100, -200, -300, -400, -500]})
        pdf2 = pd.DataFrame({'A': [...(truncated 275 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment inside the same file on lines 542, 559:

        pdf1 = pd.DataFrame({'A': [-1, -2, -3, -4, -5], 'B': [-100, -200, -300, -400, -500]})
        pdf2 = pd.DataFrame({'A': [-10,...(truncated 176 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment inside the same file on lines 679, 698:

        pdf1 = pd.DataFrame({'A': [0, 1, 2, 3, 4], 'B': [100, 200, 300, 400, 500]})
        pdf2 = pd.DataFrame({'A': [0, -1, -2, -3, -4], 'B': [-100, -200, -300, -400, -500]...(truncated 223 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment inside the same file on lines 542, 706:

        pdf1 = pd.DataFrame({'A': [-1, -2, -3, -4, -5], 'B': [-100, -200, -300, -400, -500]})
        pdf2 = pd.DataFrame({'A': [-10,...(truncated 121 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment inside the same file on lines 559, 687:

        pdf1 = pd.DataFrame({'A': [-1, -2, -3, -4, -5], 'B': [-100, -200, -300, -400, -500]})
        pdf2 = pd.DataFrame({'A': [-10, ...(truncated 120 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment inside the same file on lines 535, 552:

        pdf1 = pd.DataFrame({'A': [0, 1, 2, 3, 4], 'B': [100, 200, 300, 400, 500]})
        pdf2 = pd.DataFrame({'A': [0, -1, -2, -3, -4], 'B': [-100, -200, -300, -400, -500]...(truncated 128 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment inside the same file on lines 300, 535, 552:

        pdf1 = pd.DataFrame({'A': [0, 1, 2, 3, 4], 'B': [100, 200, 300, 400, 500]})
        pdf2 = pd.DataFrame({'A': [0, -1, -2, -3, -4], 'B': [-100, -200, ...(truncated 137 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment inside the same file on lines 535, 679:

        pdf1 = pd.DataFrame({'A': [0, 1, 2, 3, 4], 'B': [100, 200, 300, 400, 500]})
        pdf2 = pd.DataFrame({'A': [0, -1, -2, -3, -4], 'B': [-100, -200, -300, -400, -500]...(truncated 74 chars)

ℹ️ test_ops_on_diff_frames.py: Copy paste fragment inside the same file on lines 300, 535, 552, 679, 698:

        pdf1 = pd.DataFrame({'A': [0, 1, 2, 3, 4], 'B': [100, 200, 300, 400, 500]})
        pdf2 = pd.DataFrame({'A': [0, -1, -2, -3, -4], 'B': [-100, -200, ...(truncated 91 chars)

Now that you are on the file, it would be easier to pay back some tech. debt.

⭐ Change Overview

(Open in Softagram Desktop for full details)

💡 Insights

• Co-change Alert: You modified series.py. Often frame.py (databricks/koalas) is modified at the same time.

📄 Full report

• Permalink: Full report for pull/1136

Impact Report explained. Give feedback on this report to [email protected]

[codecov-io]

Codecov Report

Merging #1136 into master will increase coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1136      +/-   ##
==========================================
+ Coverage    95.2%   95.23%   +0.02%     
==========================================
  Files          34       34              
  Lines        7472     7495      +23     
==========================================
+ Hits         7114     7138      +24     
+ Misses        358      357       -1

Impacted Files	Coverage Δ
databricks/koalas/missing/series.py	100% <ø> (ø)	⬆️
databricks/koalas/series.py	96.78% <100%> (+0.04%)	⬆️
databricks/koalas/utils.py	94.94% <0%> (ø)	⬆️
databricks/koalas/groupby.py	91.47% <0%> (+0.03%)	⬆️
databricks/koalas/generic.py	97.54% <0%> (+0.54%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update dbae324...a111505. Read the comment docs.

[HyukjinKwon]

@itholic, can you rebase this PR? seems fine.

[itholic]

@HyukjinKwon Rebase & test finished :)

[HyukjinKwon]

Looks good otherwise.

[itholic]

@HyukjinKwon Thanks for the review, I fixed them :D