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KeyError: 'known_reaction'

Hello,

I was trying to run the code as following,

python3 main.py norcoclaurine_precursorsList

However I receive the following error:

Traceback (most recent call last):
  File "/home/nilay/anaconda3/envs/rdkit/lib/python3.6/site-packages/pandas/core/indexes/base.py", line 2898, in get_loc
    return self._engine.get_loc(casted_key)
  File "pandas/_libs/index.pyx", line 70, in pandas._libs.index.IndexEngine.get_loc
  File "pandas/_libs/index.pyx", line 101, in pandas._libs.index.IndexEngine.get_loc
  File "pandas/_libs/hashtable_class_helper.pxi", line 1675, in pandas._libs.hashtable.PyObjectHashTable.get_item
  File "pandas/_libs/hashtable_class_helper.pxi", line 1683, in pandas._libs.hashtable.PyObjectHashTable.get_item
KeyError: 'known_reaction'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "main.py", line 13, in <module>
    dat = Data()
  File "/mnt/c/Users/nilay/Documents/phd/pathdeneme/lscb-arbre/ARBRE/code/data.py", line 70, in __init__
    self.known_steps_all = self.df_network[self.df_network['known_reaction']==1]['UID of pair'].to_list()
  File "/home/nilay/anaconda3/envs/rdkit/lib/python3.6/site-packages/pandas/core/frame.py", line 2906, in __getitem__
    indexer = self.columns.get_loc(key)
  File "/home/nilay/anaconda3/envs/rdkit/lib/python3.6/site-packages/pandas/core/indexes/base.py", line 2900, in get_loc
    raise KeyError(key) from err
KeyError: 'known_reaction'

Where does the known_reaction come from? And what might be the problem here?

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