Column enter image description here

and wanted to check with this list

list_CI = ['Application', 'Server & Storage', 'Active Directory',
       'Please Select Value', 'SAP', 'WPS-Core Infra Services',
       'Workplace', 'WPS-Telecoms', 'Citrix', 'Networks',
       'WPS-Connectivity Support', 'WPS-Groupware', 'WPS-Smarthands',
       'Networks & Telecomms']

I tried to apply lambda but fail. How can solve through regex or any other method?

Please hint and shed some light. Thanks.

  • $\begingroup$ Can you clarify your question: what do you mean by if it contains this value ? do you mean is the string in your list a substring of the string in the column ? $\endgroup$ Commented Jul 3, 2019 at 11:11

3 Answers 3


You could try this if this is simple and more readable:

Sample_data['Extracted_New_CI'] = Sample_data[Sample_data['CI Name'].isin(list_CI)]

This is the solution, after 4-5 attempt this code solves the problem

 def extractServiceName(x):
    if x in  list_CI:
        return x
        return ''

Sample_data['Extracted_New_CI'] = Sample_data['CI Name'].apply(lambda x : extractServiceName(x))

I would recommend using "apply" method in pandas, which allows you to apply a function along an axis of the DataFrame.

So, what I did is to write a function that checks whether a given row of data frame contains one of the values in the list or not. If it contains one of the values it returns that value; otherwise, it returns None.

Then, I applied this function along axis 1 of the data frame using "apply" method.

Also, I tried to use the lower case of each word in the list and each row to prevent any consequent issues; you can remove that if the capital or lower case matter in your case.

def check_value(x):
    for i in list_CI:
        if i.lower() in x.lower():
           return i
    return None

df['new_col'] = df.apply(lambda x['CI Name']: check_value(x), axis = 1)
  • $\begingroup$ thank you for answering! However, all-code answers are discouraged; would you be able to add some corresponding text that provides explanation? $\endgroup$
    – Ben
    Commented Jul 27, 2020 at 21:49
  • 1
    $\begingroup$ I added some explanations $\endgroup$
    – nimar
    Commented Jul 28, 2020 at 0:23
  • $\begingroup$ Is it clear for you? $\endgroup$
    – nimar
    Commented Jul 28, 2020 at 17:38
  • $\begingroup$ Yes, thank you for adding the explanations! I was not having this particular problem, but for those who are having this problem, they would very much appreciate the text you added. $\endgroup$
    – Ben
    Commented Jul 28, 2020 at 20:14

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