How can I expand a dataframe which has 1 line to hundreds of times of it

Question

I want to expand a dataframe which only has 1 line to hundreds of times (330 exactly)of it. Is there any way to do that easily? All lines are the same.

A dataframe like this:

     f_date     f_open  f_close  f_high  f_low  f_volume  pre_date  pre_open  \
0  2019-01-21    24.5     24.5    24.5   24.5       0.0  2019-01-18     24.55

   pre_close  pre_high  pre_low  today_open  today_volumn  today_close  \
0       24.5     24.62    24.11        24.5           0.0         24.5

   pre_rate
0       0.0

I want to make it 330 times bigger and all lines are the same.

score 3 · Accepted Answer · answered Apr 08 '19 at 11:50

3

Here's a simple way:

pd.concat([df] * 330)

answered Apr 08 '19 at 11:50

John Zwinck

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score 2 · Answer 2 · answered Apr 08 '19 at 12:02

2

pd.concat([df]*330, ignore_index=True)

the default ignore_index is set to False so if you don't set it to True you will have duplicate index "0" 330 times

answered Apr 08 '19 at 12:02

nassim

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How can I expand a dataframe which has 1 line to hundreds of times of it

2 Answers2