Answers for "access by index pandas"

isolate row based on index pandas

dfObj.iloc[: , [0, 2]]

accessing index of dataframe python

# For accessing dataframe index:
df.index
# For retrieving dataframe index as list:
df.index.tolist()
# for accessing value for an index:
df.at[index_value, column_value]

pandas df by row index

indices = [133, 22, 19, 203, 14, 1]
df_by_indices = df.iloc[indices, :]

retrieve row by index pandas

rowData = dfObj.loc[ 'b' , : ]

add an index column in range dataframe

df = df.loc[df.index.repeat(df['a'])]   
df['c'] = df.groupby(level=0).cumcount() + 1
df = df.reset_index(drop=True)
print (df)
   a  b  c
0  1  x  1
1  2  y  1
2  2  y  2
3  3  z  1
4  3  z  2
5  3  z  3