How do I format lists that are continuously being appended and added to?

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I have an empty list which is continuously being appended when data is inputted via the input function e.g.

x = []

After the first input, the list will be automatically appended to something like this: x = [CAR]

how do I format the list to show something like this:

>>>Encryption 1: CAR

Then after the second input, the list will show :

x = [CAR, SHIP]

>>>Encryption 1: CAR
>>>Encryption 2: SHIP

I have started by creating two lists: x = [] encryption_labels = [] this is where i am planning the Encryption 1, Encryption 2... and so on. To be formed.

but i am stuck :(

With just one list, you can iterate through the list using enumerate() to get both the index and the value. Then you can print stuff out depending on that:

x = ['CAR', 'SHIP']

for idx, val in enumerate(x):
    print(f">>>Encryption {idx + 1}: {val}")

which prints the following:

>>>Encryption 1: CAR
>>>Encryption 2: SHIP

11. Lists — How to Think Like a Computer Scientist: Learning with , and added to? I have an empty list which is continuously being appended when data is inputted via the input function e.g. x = [] After the first input, the list. Thank you for the good tips. I take it that this post an example of “Do as I say, not as I do.” (See list item #1.) Elke on January 04, 2011 11:09 am. Thanks for the tips for formatting list. I’d prefered to find some examples going with every tip, so I could better imagine how the list might look when keeping to the tip. Regards, Elke

Just iterate through and access the respective index

for i in range(len(x)):
  print(encryption_labels[i] + ": " + x[i])

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You can convert x to encryption_labels at the end after finishing appending all the elements to x:

encryption_labels = [f">>>Encryption {i+1}: {xi}" for i, xi in enumerate(x)]

Python List append() Method, append() Parameters. The method takes a single argument. item - an item to be added at the end of the list. The item can� 3. Lists 3.0 Overview. All data structures in q are ultimately built from lists: a dictionary is a pair of lists; a table is a special dictionary; a keyed table is a pair of tables. Thus it is important to have a thorough grounding in lists. All lists are equal but some lists are more equal than others.

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5. Data Structures — Python v3.1.5 documentation, Remember to always indent the code that's to be executed within the loop. The .append() method always adds to the end of the list. you can loop through each date in the list, and printed each one formatted with the f-string %m/%d/%Y� appended definition: 1. past simple and past participle of append 2. to add something to the end of a piece of writing: . Learn more.

5. Data Structures — Python 3.3.7 documentation, list.append(x): Add an item to the end of the list; equivalent to of a list is slow ( because all of the other elements have to be shifted by one). As you see, on output tuples are always enclosed in parentheses, format(q, a)) . Continuously Compounded Interest is a great thing when you are earning it! Continuously compounded interest means that your principal is constantly earning interest and the interest keeps earning on the interest earned!

Comments
  • What's the purpose of this formatting? If you just wish to print the list like that you can create a method that formats a string like that or do you need the values in the list to be prepended with "Encryption x:"
  • This isn’t very clear. Can you be more specific, both about the current question and your overarching goal or the context surrounding this question?