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- # Move rows from one dataframe to another
- # https://stackoverflow.com/questions/36142959/pandas-move-rows-from-1-df-to-another-df#36143395
- import pandas as pd
- data = {'Name':['Tom', 'nick', 'krish', 'jack'], 'Age':[20, 21, 19, 18]}
- df = pd.DataFrame(data)
- df_from = df.copy()
- df_to = pd.DataFrame()
- def move(a,b,cond):
- rows = a.loc[cond, :]
- # b.append acts like pass-by-value, parent not affected
- b = b.append(rows, ignore_index=True)
- # a.drop acts like pass-by-reference, parent affected
- a.drop(rows.index, inplace=True)
- return b
- # return local copy so it can be assigned in parent
- return(b)
- df_to = move(df_from,df_to,df_from.Name == "Tom")
- df_to = move(df_from,df_to,df_from.Name == "nick")
- print("AFTER")
- print(f"df_from is {df_from}")
- print(f"df_to is {df_to}")
- print()
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