Pandas DataFrame concat vs append

Question

I have a list of 4 pandas dataframes containing a day of tick data that I want to merge into a single data frame. I cannot understand the behavior of concat on my timestamps

Answer 1

Pandas concat vs append vs join vs merge

• Concat gives the flexibility to join based on the axis( all rows or all columns)

• Append is the specific case(axis=0, join='outer') of concat

• Join is based on the indexes (set by set_index) on how variable =['left','right','inner','couter']

• Merge is based on any particular column each of the two dataframes, this columns are variables on like 'left_on', 'right_on', 'on'