Pandas concat flips all my values in the DataFrame

Question

I have a dataframe called \'running_tally\'

        list   jan_to  jan_from
0         LA    True      False
1         NY   False       True

I am

Answer 1

I don´t get the booleans flipped as you, but you can try this too:

running_tally=running_tally.append(new_data,ignore_index=True)
print(running_tally)

Output:

  list jan_to jan_from
0   LA   True    False
1   NY  False     True
2  HOU    NaN      NaN

EDIT: Since the question was edited, you could try with:

running_tally=running_tally.append(new_data,ignore_index=True).groupby('list',as_index=False).first()