How to improve performance of dataframe slices matching? Question: I need to improve the performance of the following dataframe slices matching. What I need to do is find the matching trips between 2 dataframes, according to the sequence column values with order conserved. My 2 dataframes: >>>df1 trips sequence 0 11 a 1 11 d …
Check dataframe value to dictionary, append key to new column Question: I am trying to check a row value for a match in a dictionary and append the key to a new column. Example: group_ID = { ‘Group A’:[4738, 4812], ‘Group B’:[5888, 6551], ‘Group C’:[4487, 7888] } user_data = [[‘Alex’,4812],[‘Bob’,4487],[‘Clarke’,5888]] sample_df = pd.DataFrame(user_data,columns=[‘Name’,’User ID’]) print(sample_df) …
How to not double print when matching multiple words in a sentence Question: Say we have the following sentence and words to match sentences = [‘There are three apples and oranges in the fridge.’, ‘I forgot the milk.’] wordsMatch = [‘apples’, ‘bananas’, ‘fridge’] How to iterate through the sentences and print them if there is …
Debugging in Hungarian Maximum Matching Question: I wrote a code to solve the following algorithm question: Given a number of positive integers all larger than 1, find the maximum number of pairs whose sum is a prime number. The number of positive integers is always an even number. For example, given 2 5 6 13 …
Match two pandas dataframe depending on multiple conditions Question: I have two datasets (df_persons and df_database). Both of them have the same structure: cu_id sex eye_colour favourite_sport cash_on_account 1 m blue soccer 15 2 f green tennis 25 3 m brown ski 33 (much more rows with various combinations of sex, eye_colour and favourite_sport) For …
Pandas isin() does not return anything even when the keywords exist in the dataframe Question: I’d like to search for a list of keywords in a text column and select all rows where the exact keywords exist. I know this question has many duplicates, but I can’t understand why the solution is not working in …
How to use multiple cases in Match (switch in other languages) cases in Python 3.10 Question: I am trying to use multiple cases in a function similar to the one shown below so that I can be able to execute multiple cases using match cases in python 3.10 def sayHi(name): match name: case [‘Egide’, ‘Eric’]: …
Python Match Case (Switch) Performance Question: I was expecting the Python match/case to have equal time access to each case, but seems like I was wrong. Any good explanation why? Lets use the following example: def match_case(decimal): match decimal: case ‘0’: return "000" case ‘1’: return "001" case ‘2’: return "010" case ‘3’: return "011" …
How can I match a text with colon using regex? Question: I want to use regex to match any case with only 1 colon in front of a name or behind it, but not a name in between two colons. Matches things like this: name: | :name | name:`asdf` But should not match any of …
Determining Number of Groups Returned From Regex Search in Python Question: I’m performing a regex search in python like the one below: import re regexSearch = re.search(r’FTP-exception-sources-d{1,3}.d{1,3}.d{1,3}.d{1,3}’, line, re.M|re.I ) if regexSearch: outputFile2.write(str(lineCounter) + ” , ” + regexSearch.group(0) + “n”) How can I determine the number of groups that get returned from the regex …
