convert list to string using join Question: I was trying to convert the below tags column to normal string without the brackets and commas and tried the below two ways but I’m getting error. can someone tell a correct way Error: can only join an iterable Asked By: Jutika Patil || Source Answers: If there …
Python joining strings fails Question: I have an odd problem with my code and cannot find the mistake. I am trying the reverse names in "SURNAME, First Names, Religious Title" format to "First Names Surname" and have written the following lines of code: try: for x in range(0, df_length): print(df_length – x) e_df=df.iloc[[x]].fillna("@") # virtual …
Is it possible to join reference data into a nested dict in a pandas dataframe? Question: I am trying to join two pandas data frames – the "left" table, which contains a column with a complex type (an array of dicts) and the "right" table is a flat reference table. pseudo table representation of these …
How to left join numpy array python Question: What’s the numpy "pythonic" way to left join arrays? Let’s say I have two 2-D arrays that share a key: a.shape # (20, 2) b.shape # (200, 3) Both arrays share a common key in their first dimension: a[:, 0] # values from 0..19 b[:, 0] # …
How to join different dataframe with specific criteria? Question: In my MySQL database stocks, I have 3 different tables. I want to join all of those tables to display the EXACT format that I want to see. Should I join in mysql first, or should I first extract each table as a dataframe and then …
How to merge two dfs based on a substring of the strings in a column and insert values of another column? Question: I have the following dfs: data: ZIP code urbanisation 1111AA 3916HV reference: ZIP code category urbanisation 1111 High 3916 Medium So the urbanisation in my data set is empty and I need to …
Python Pandas Join doesnt work unexpected argument Question: import pandas as pd df1 = pd.read_csv("sdvsdvsvsd.csv") df2 = pd.read_csv("dsvsdvdv.csv") df3 = df1.join(df2, how=’inner’, left_on = ‘TIME’, right_on = ‘TIME’) I created a joint but when I run it, I get a message"unexpected argument". I checked it multiple times and cant see any misstake. beginner here, please …
How can I make an intersection of two columns of two tables and get the entire rows? Question: I have a SQLite table. Let’s call it people. Name Age Jane 50 John 80 Alice 46 Mark 25 Harry 33 I have another table work. Name work_id Jane 1 Amanda 2 Filip 3 Alice 4 Jack …
Join rows and concatenate attribute values in a csv file with pandas Question: I have a csv file structured like this: As you can see, many lines are repeated (they represent the same entity) with the attribute ‘category’ being the only difference between each other. I would like to join those rows and include all …
Combine multiple columns as a string in python Question: I am trying to combine multiple columns from a dataframe into a new column in the same dataframe. Those columns could either have a string value or are Na or NaN. Whenever one column is Na/NaN, I would like these columns to not be included in …
