How to perform search and match from a pandas column to create a new column?

Question

I have a pandas data frame where, there is a string column A. I want to match for specific key words in the list below and create a new column.

[Android, iOS, Windows, Linux, MacOS].

If there is no match from the above list, then the new column value is 'Other'.

Column_A	New_Column
Android10	Android
iPhoneiOS 13.5.1	iOS
SamsungAndroid 9	Android
Windows 10	Windows
iPhoneiOS 13.7	iOS
iOS 14.2	iOS
iOS 13.6	iOS
iOS 13.6.1	iOS
iOS 14.1	iOS
iOS 13.4.1	iOS
iOS 14.0.1	iOS
HTCAndroid 8.1.0	Android
Android 8.0.0	Android
iOS 14.0	iOS
Chrome OS	Other
Windows 7	Windows
Mac OS X 10.15.4	MacOS

Answer 1

You can try following code:

Creating dummy dataframe and list of words to match:

terms = ['Android', 'iOS','Windows']
x = pd.DataFrame({'Col1':['iPhoneiOS 13.5.1','Android10','SamsungAndroid 9','Windows 10','iPhoneiOS 13.7','iOS 14.2','Test','',np.nan]})

Helper function to find strings:

def find_str(x):
  for i in terms:
    if i.lower() in x.lower():
        return i
    else:
        return 'Others'

x['Match'] = x['Col1'].astype(str).apply(lambda x: 'Others' if x is None else find_str(x))
print(x)