for-loop

问题 I am relatively new to python programming. I have a list of pandas dataframes that all have the column 'Year'. I am trying to group by that column and convert to a dictionary where the dictionary key is the variable 'Year' and values is a list of dataframes of that year. Is this possible in python? I tried this: grouped_dict = list_of_csv_files.groupby(by = 'Year').to_dict() I believe I will have to loop through each dataframe? I did not provide any data because I am hoping it is a somewhat

问题 I'm trying to write a function that will iterate through a variable holding objects. If you pass in a first name that is an object property, you should get true. If not, you should get false. However, no matter what I pass through the function, I always get false. Any help is greatly appreciated. var contacts = [ { "firstName": "Akira", "lastName": "Laine", "number": "0543236543", "likes": ["Pizza", "Coding", "Brownie Points"] }, { "firstName": "Harry", "lastName": "Potter", "number":

问题 I'm trying to write a function that will iterate through a variable holding objects. If you pass in a first name that is an object property, you should get true. If not, you should get false. However, no matter what I pass through the function, I always get false. Any help is greatly appreciated. var contacts = [ { "firstName": "Akira", "lastName": "Laine", "number": "0543236543", "likes": ["Pizza", "Coding", "Brownie Points"] }, { "firstName": "Harry", "lastName": "Potter", "number":

问题 I have created a code to create tkinter OptionMenus with values in a dictionary using a for loop. The code seems to work successfully, with OptionMenus appearing with keywords on a window as desired... import tkinter as tk from tkinter import * class Example: def __init__(self): #Dictionary with categories and their relative keywords self.categorykeywords={"Category 1":["Keyword 1", "Keyword 2", "Keyword 3"], "Category 2":["Keyword A","Keyword B","Keyword C"], "Category 3":["Another Keyword"]

问题 I have a little function in google app script that have to do some things in a for loop, i.e.I have 3 rows with some values and for each row I have to update a sheet, but unfortunately I don't understand why but after just one loop the program stopped! And there are no return statements. this is the code: function movimentiRicorrenti(){ tempoInizioScript = new Date(); var rigaInizio = 2 Logger.log("Data e ora script movimenti ricorrenti: " + Utilities.formatDate(new Date(), "GMT+0200", "dd/MM

问题 I receive daily CSV reports, and each has the same number of variables but from different times. I want to run some simple analysis based on date and save the results. I think a for loop can do the job, but I only know the basics. Ideally, I only need to run the script once a month and get the results. Any guidance or advise is appreciated. Let's say I have two CSV reports in a folder: #File 1 - 20200624.csv Date Market Salesman Product Quantity Price Cost 6/24/2020 A MF Apple 20 1 0.5 6/24

问题 I'm trying to learn coding but I can't wrap my head around what happens in a "for" loop. if/else if/else statements are easy. if (this is true) { do this. else [otherwise, but] if (this is true) { do that. else do this. "while" and "do/while" loops are easy too. while (this is is true) { do this. or do this { } while (this is true). Now, I know the structure of a "for" loop: (start, finish, increment). I can even make one that works for basic problems. However, I don't know what the computer

问题 I am using Python/Selenium to extract some text from a website to further sort it in Google Sheets. There are 15 headers for which I need to extract text. The text is found under each header in tag h5. Here's one extract of a header: <tr class="dayHeader"> <td colspan="7" style="padding:10px 0;"> <hr> <h5>  Tuesday - 02 February 2021</h5> </td> </tr> What I have done is the following: headers = driver.find_elements_by_tag_name('h5') results = [] for header in headers: result = header.text

问题 sorry for the "fix my code" post EDIT: related more to syntax of a for loop than prime numbers, also solved now. My task is to take an int from the console and print out (on separate lines) all the prime numbers from 1 to n inclusive. My method starts at n, checks if its prime, then increments n down by one and loops until n=2. To check if a number is prime I run a loop, checking is the remainder of diving the number by x is equal to zero, with x starting at 2 and stopping at root(n). Now

问题 I have a dataset called "My_data", and three variables called a, b, c. The head of my data is like this: > head(My_data) variable_A variable_B value 1 Jul W1 18.780294 2 Jul W2 13.932397 3 Aug W2 20.877093 4 Sep W3 9.291295 5 May W1 10.939570 6 Oct W1 12.23671 I want to do Shapiro normality test for each subset with two variables. > Subset1=subset(My_data, variable_A== "Jan" & variable == "W1") > Subset2=subset(My_data, variable_A== "Feb" & variable == "W1") > Subset3=subset(My_data, variable