repeating the rows of a data frame

Question

I\'m trying repeat the rows of a dataframe. Here\'s my original data:

pd.DataFrame([
        {\'col1\': 1, \'col2\': 11, \'col3\': [1, 2] },
        {\'col1\         


        

Answer 1

You can use a list comprehension together with zip.

>>> pd.DataFrame([row for row, count in zip(df[['col1', 'col2']].values, df['col3']) 
                  for _ in range(len(count))], columns=df.columns[:2])
   col1  col2
0     1    11
1     1    11
2     2    22
3     2    22
4     2    22
5     3    33
6     4    44
7     4    44
8     4    44
9     4    44