How to Add Incremental Numbers to a New Column Using Pandas

Question

I have this simplified dataframe   ID   Fruit F1   Apple F2   Orange F3   Banana    I want to add in the begining of the dataframe a new column df  New ID    which has the number 880 that increments by one in each row   The output should be simply like   New ID   ID   Fruit 880      F1   Apple 881      F2   Orange 882      F3   Banana     I tried the following   df  New ID       880     but I want to do this without assigning it the list of numbers literally   Any idea how to solve this   Thanks

User · Answer

You can also simply set your pandas column as list of id values with length same as of dataframe.

df['New_ID'] = range(880, 880+len(df))

Reference docs : https://pandas.pydata.org/pandas-docs/stable/missing_data.html

User · Answer

import numpy as np  df  New ID   np arange 880 880 len df Fruit   df df reindex columns   New ID   ID   Fruit

User · Answer

df   df assign New ID  880   i for i in xrange len df       New ID     df columns tolist      gt  gt  gt  df    New ID  ID   Fruit 0     880  F1   Apple 1     881  F2  Orange 2     882  F3  Banana

User · Answer

Here   df   df reset index   df columns 0     New ID  df  New ID     df index   880

User · Answer

df insert 0   New ID   range 880  880   len df    df

User · Answer

For a pandas DataFrame whose index starts at 0 and increments by 1  i e   the default values  you can just do  df insert 0   New ID   df index   880   if you want New ID to be the first column  Otherwise this if you don t mind it being at the end  df  New ID     df index   880

[python] How to Add Incremental Numbers to a New Column Using Pandas

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