The effects of the three different methods to remove an element from a list: remove removes the first matching value, not a specific index: del removes the item at a specific index: and pop removes the item at a specific index and returns it. Their error modes are different too:
The len() function can be used with several different types in Python – both built-in types and library types. For example:
This question already has answers here: How to concatenate items in a list to a single string? How can I convert a list to a string using Python?
Your problem is with this line: It tries to take cow[n], which returns an integer, and make it a list. This doesn’t work, as demonstrated below: Perhaps you meant to put cow[n] inside a list: See a demonstration below: Also, I wanted to address two things: Your while-statement is missing a : at the end. It is considered very dangerous to … Read more
If you have a list with 53 items, the last one is thelist[52] because indexing starts at 0. IndexError Attribution to Real Python: Understanding the Python Traceback – IndexError The IndexError is raised when attempting to retrieve an index from a sequence (e.g. list, tuple), and the index isn’t found in the sequence. The Python … Read more
First, array_length should be an integer and not a string: Second, your for loop should be constructed using range: Third, i will increment automatically, so delete the following line: Note, one could also just zip the two lists given that they have the same length:
It’s pretty simple really: There is also the step value, which can be used with any of the above: The key point to remember is that the :stop value represents the first value that is not in the selected slice. So, the difference between stop and start is the number of elements selected (if step is 1, the default). The other feature is that start or stop may be a negative number, which … Read more
It’s pretty simple really: There is also the step value, which can be used with any of the above: The key point to remember is that the :stop value represents the first value that is not in the selected slice. So, the difference between stop and start is the number of elements selected (if step is 1, the default). The other feature is that start or stop may be a negative number, which … Read more
Your problem is with this line: It tries to take cow[n], which returns an integer, and make it a list. This doesn’t work, as demonstrated below: Perhaps you meant to put cow[n] inside a list: See a demonstration below: Also, I wanted to address two things: Your while-statement is missing a : at the end. It is considered very dangerous to … Read more
append: Appends object at the end. gives you: [1, 2, 3, [4, 5]] extend: Extends list by appending elements from the iterable. gives you: [1, 2, 3, 4, 5]