[BUG] mars.dataframe.DataFrame.loc[i:j] semantics is different with pandas

[dlee992]

Reporting a bug

import pandas as pd
import mars
import numpy as np

df = pd.DataFrame(np.random.rand(5,3))
sliced_df = df.loc[0:1]
# Out[6]: sliced_df
#           0         1         2
# 0  0.362741  0.466188  0.750695
# 1  0.775940  0.544655  0.711621

mars.new_session()
md = mars.dataframe.DataFrame(np.random.rand(5, 3))
sliced_md = md.loc[0:1]
sliced_md.execute()
# Out[14]: sliced_md
#           0         1         2
# 0  0.851917  0.508231  0.908007

As you can see, mars choose right open, while pandas choose right closed. They contain different behaviours.

Python 3.7.9 & Pandas 1.2.0 & mars 0.7.5