Python – Having trouble with arranging a parallel list within a for loop based on user input Question: Slow beginner here. Trying to write a program that asks the user how many entries to make. From that number, it will then ask the user for their name and address to print in a parallel list. …
Column missing after append and concat in python pandas Question: Try to download historical stock prices for bunch of stock scrips and concat the file. The issue is final output does not give me the ‘Date’ column which is the first column Here is my code: from nsepy import get_history import pandas as pd from …
How can I efficiently filter and store maximum and minimum x,y pairs from a large list in Python? Question: I have a loop function to calculate 2 values of the combinations of one list: xyList = [] for i, j in itertools.combinations(mx, 2): x= *some calculation* y= *some calculation* xyList.append([x,y]) However, the combinations of the …
Appending a value to a list inside a list Question: A simple question regarding the appending rule of list. So the code is list = [1,2,3,4] for x in [list] #Yes a list in a list: x.append(2) print(x) print(list) The result of the two print is both [1,2,3,4,2]. I can see why print(x) outputs 1,2,3,4,2 …
append() is overwriting the previous data he has written instead of just adding at the end Question: i’m wondering why the function append() is overwritting the elements given in a list that he has to write one after another. I’m really lost here. So here is the list of elements (I use fake identity names) …
How to increment an integer in a list iteratively within a while loop Question: Can anyone help me with understanding this please? I’m using a while loop to increment an integer within a list and then i’m trying to add the list to another list to create a list of lists. The list of lists …
Pandas Concat vs append and join columns –> ("state", "state:", "State") Question: I join 437 tables and I get 3 columns for state as my coworkers feel like giving it a different name each day, ("state", "state:" and "State"), is there a way that joins those 3 columns to just 1 column called "state"?. *also …
String content become random integer after using append() Question: I’m writing a function to filter tweet data that contains search word. Here’s my code: def twitter_filter(df, search): coun = 0 date_ls = [] id_ls = [] content_ls = [] lan_ls = [] name_ls = [] retweet_ls = [] cleaned_tweet_ls = [] for i, row in …
Python: How to validate and append non-existing row in a dataset/dataframe? Question: How can we append a non-existing row/value in a dataset? I have here a sample table with list of names and the objective is to validate first the name if this doesn’t exist and append it to the dataset. Please see code below …
Conditionally append rows from one dataframe to another based on key-id and date range Question: I have two large dataframes with the same columns. Example data of relevance is presented below. import pandas as pd df1 = [[52, ‘1’, ‘Mast’, ‘1/1/2022’], [54, ‘1’, ‘Mast’, ‘1/1/2023’], [55, ‘2’, ‘Mast’, ’25/5/2022′], [52, ‘1’, ‘Mast’, ’14/7/2022′]] df = …
