df.loc[row][column] = value has no effect

[gshimansky]

System information

• OS Platform and Distribution (e.g., Linux Ubuntu 16.04):

Ubuntu 20.04

• Modin version (modin.__version__):

0.7.3+165.g9721d46

• Python version:

Python 3.8.2

• Code we can use to reproduce:

import modin.pandas as pd

df = pd.DataFrame(index=["a", "b", "c"], columns=["col1"])
df.loc["a"]["col1"] = 123
df.loc["b"]["col1"] = 321
df.loc["c"]["col1"] = 444
print(df)

Describe the problem

Assigning to df.loc[row][column] as no effect and dataframe contents remains all NaN.

Source code / logs

[devin-petersohn]

Related to #1556

[gshimansky]

Yes the same problem must have happened in #1556 because loc and iloc don't initialize resulting Series._parent field.