Python Python Pandas Insert List Into A Cell

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9 answers sorted by: 195 since set value has been deprecated since version 0.21.0, you should now use at. it can insert a list into a cell without raising a valueerror as loc does. i think this is because at always refers to a single value, while loc can refer to values as well as rows and columns. If you pass a list, pandas considers it as several rows. however, you can trick it by placing your list as the single element of an outer list as bellow: import pandas as pd mapping dict = {'a': [ ['a', 'b', 'c', 'd']], 'b': [ ['aa', 'bb', 'cc']]} df = pd.dataframe (mapping dict) df a b 0 [a, b, c, d] [aa, bb, cc] share improve this answer follow. Notice that pandas uses index alignment in case of value from type series: >>> df . insert ( 0 , "col0" , pd . series ([ 5 , 6 ], index = [ 1 , 2 ])) >>> df col0 col1 col1 newcol col2 0 nan 100 1 99 3 1 5.0 100 2 99 4. Python: python pandas insert list into a cell posted on monday, october 18, 2021 by admin df3.set value (1, 'b', abc) works for any dataframe. take care of the data type of column 'b'. eg. a list can not be inserted into a float column, at that case df ['b'] = df ['b'].astype (object) can help. Inserting a column with static value: python3 import pandas as pd data = pd.read csv ("pokemon.csv") data.head () output: after inserting column: python3 import pandas as pd data = pd.read csv ("pokemon.csv") data.head () data.insert (2, "team", "any") data.head () passing series with different value for each row:.

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These inserts work perfectly: df.loc [1,"b"] = abc or df4.loc [1,"b"] = abc. 👻 read also: what is the best laptop for engineering students? we hope this article has helped you to resolve the problem. apart from python pandas insert list into a cell, check other abc python module related topics. want to excel in python?. To insert a list into a cell with python pandas, we can assign the list we want to insert to the location in the data frame we want to insert it in. for instance, we write: import pandas as pd df = pd.dataframe (data= {'a': [1, 2, 3], 'b': ['x', 'y', 'z']}) df.at [1, 'b'] = ['c', 'd']. To insert lists into a pandas dataframe cell, we must first ensure that the type of the column is object. this is because a column is represented using series, which can only hold one data type. this means that integers and lists cannot be mixed together. as a workaround, we can make the column type as general as possible by setting it to object.

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Python : Python Pandas Insert List Into A Cell