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Tag: python-3.x

Updating A List Word Counter

I’m creating a program that counts letters. I created two dictionaries that both have the same word and, because they are the same exact word, both have the same counter. I want to know how to merge the two dictionaries so that it updates the counters as well, but I consistently receive the result “NONE.” Answer You can concatenate strings

How to iterate over nested list to input missing values

I have two objects, a variable (username), and a list (products) of products and costs All prices are unique to each customer. Similarly, the product set is also unique to each customer, so I cant say take a specific index such as products[0] and it would always be ‘pr1’. I’ve zipped the two objects together: This gets me part way

Match True in python

In JavaScript, using the switch statement, I can do the following code: And it’s going to return 1, since JavaScript switch is comparing true === (1 === 1) But the same does not happen when I try it with Python Match statement, like as follows: It returns: And another error is returned if I try it this way: It returns:

Return decimal fields from list

I have a generator which yields to datatype on is decimal and other is string i need the method to just return the decimal get_amount() now it is returning [(Decimal(‘1950.00′), ’06/16/2020’), (Decimal(‘4500.00′), ’06/16/2020’)] I want the list to be returned as formatted how can i do that ‘${:0,.2f}’.format(Decimal(‘1950.00’) which is in my list) so the end result would be like

Optimization problem for S-I-S model using python

I have a susceptible-infectious-susceptible model, to which I’ve written the following python code, And I’m solving it using the following code, This part is fine. I’m having trouble finding the double derivative and optimizing it for the value of the beta parameter. The problem is that the beta is not given and since that parameter is within the exponential function,

Get latest timestamp from list of dictionaries

I have list of dictionaries that I am pulling from a ticketing system. Each dictionary contains the name and timestamp of a ticket. There are cases where multiple tickets are entered for the same user and I would like to filter this list to only append the ‘latest’ timestamp to the list, rather than all occurrences. Edit: I am looking

Add a space after a word if it’s at the beginning of a string or if it’s after one or more spaces, and at the same time it must be at end or before n

How to obtain this outputs from those inputs? Note that for examples 4, 5, 6 and 7 the regex should not make any changes, since after the word there is already a space placed, or because in the case of “uno”, the word “un” is not at the end of the sentence, or in the case of “treinta yun” the