how to update an old dataframe from newest one
it look like this the old one:
|Énergie(keV)|  Intensité(%)|   Type  | Parent |    Période|    Unité|
|:-----------|:------------:|:-------:|:------:|:---------:|:-------:|
|0.381       |0.019         |XL       |Sc-44   |3.97       |h        |
|10.408      |0.45          |XL       |Ti-44   |60.0       |a        |
|0.430       |0.00013       |XL       |Fr-221  |83.788     |d        |
the forth row mus be updated from the new dataframe
i have this old DataFrame:




Énergie(keV)
Intensité(%)
Type
Parent
Période
Unité




13.31275
2.18
XL
Fr-221
4.79
min


78.94000
0.96
XKα2
Fr-221
4.79
min


81.51000
1.59
XKα1
Fr-221
4.79
min


92.30930
0.55
XKβ1
Fr-221
4.79
min




i want update the 3 first columns with;




Énergie(keV)
Intensité(%)
Type
Parent




13.31275
18
γ
Fr-221


75.94000
25
γ
Fr-221


89.51000
1.09
XKα1
Fr-221


99.00000
0.85
γ
Fr-221




I have a big dataframe , but they havn't a same dimensions;