Question: Here i got first date of the month but along with first date i want last date of the month as well. So how it will be possible. What change should i make to get the last date of the month as well? Answer To ge the end of the months you can do: If you want a single
Tag: pandas
Pipline with SMOTE and Imputer Errors
i am trying to create a pipeline that first impute missing data , do oversampling with the SMOTE and the the model my code worked perfectly before i try smote not i cant find any solution here is the code without smote And here’s the code after adding smote Note: I tired importing make pipeline from iml…
How do I square a column from an Excel file with pandas?
I’ve read an Excel file into python using: and I’m trying to square the columns using: I keep getting the error: I’m fairly new to python. Is there any way to easily fix this? Answer Never use apply-lambda for straightforward mathematical operations it is orders of magnitude slower than usin…
Pandas – Specify Slice + Additional Column Label in loc()
When using loc, it seems I can either specify a list with separate column labels or a slice. However, can I combine a slice with an additional column label and -if so- how? I tried but this throws a syntax error… Answer Solution with loc
Dataframe new columns to tell if the row contains column’s header text
2 columns dataframe as the first screenshot. I want to add new columns (by the contents in the Note column from the original dataframe) to tell if the Note column contains the new column’s header text. Example as the second screenshot. Some lines work for a few columns. When there are a lot of new colum…
Verify that a column name is a unique identifier
I have a dataset called df_authors and in that dataset I have a column called author. I have to verify that df_authors.author is a unique identifier. What I tried, len(df_authors) == len(df_authors[‘author’].unique()), and this returns True. My question is have I done this right. I found this line…
Remove specific string char at the beginning of each lines of a txt file using python
I’m currently working on a script in python. I want to convert an xls file into a txt file but I also want to clean and manage the data. In the xls files, there’s 4 columns which does interest me. Here is a sample of the txt I get from the conversion : To get this result I used this
pandas, access a series of lists as a set and take the set difference of 2 set series
Given 2 pandas series, both consisting of lists (i.e. each row in the series is a list), I want to take the set difference of 2 columns For example, in the dataframe… I want to create a new column C, that is set(A) – set(B)… Answer Thanks to: https://www.geeksforgeeks.org/python-difference-t…
Pandas: return rows that have two matching columns commonality
I am trying to write a commonality script which will return rows in a pandas dataframe that have two matching columns, and also will sum up the number of rows with matches into a new column OPERATION and MACHINE are the columns to match Input: BATCH OPERATION MACHINE DATE 1A 4000 Printer1 01-Jan-22 1A 2000 Fa…
In Pandas sum columns and change values to proportion of sum
If I have the following DataFrame, how can I convert the value in each row to the proportion of the total of the columns? Input: Output: Answer How about apply?