Anyone tinkering with Python long enough has been bitten (or torn to pieces) by the following issue: def foo(a=): a.append(5) return a Python novices would expect this function to always ...
I'm trying to make a function that will compare multiple variables to an integer and output a string of three letters. I was wondering if there was a way to translate this into Python. So say: x = 0 ...
I need a good explanation (references are a plus) on Python's slice notation. To me, this notation needs a bit of picking up. It looks extremely powerful, but I haven't quite got my head around it...
I am writing a program that must accept input from the user. #note: Python 2.7 users should use `raw_input`, the equivalent of 3.X's `input` age = int(input("Please enter your age: ")) if age >= 1...
I needed to create a list of lists in Python, so I typed the following: myList = [ * 4] * 3 The list looked like this: [[1, 1, 1, 1], [1, 1, 1, 1], [1, 1, 1, 1]] Then I changed one of t...
What are the options to clone or copy a list in Python? Using new_list = my_list then modifies new_list every time my_list changes. Why is this?
How do I accomplish variable variables in Python? Here is an elaborative manual entry, for instance: Variable variables I have heard this is a bad idea in general though, and it is a security hole ...
I have a list of arbitrary length, and I need to split it up into equal size chunks and operate on it. There are some obvious ways to do this, like keeping a counter and two lists, and when the second...
The Python documentation seems unclear about whether parameters are passed by reference or value, and the following code produces the unchanged value 'Original' class PassByReference: def __init_...
I'm iterating over a list of tuples in Python, and am attempting to remove them if they meet certain criteria. for tup in somelist: if determine(tup): code_to_remove_tup What should I...