Comment by wwfn

Tangential (but topical in that "The threat is comfortable drift toward not understanding what you're doing" is also on the front page):

Is the generated python code in the example wrong?

The prompt

> Develop a Python function that removes any falsey values from a list. Return the modified list without creating a new one.

Is answered with list comprehension, which makes a new list and leaves the original unmodified (never mind that the *args input necessarily can't be a modifiable list?)

   def remove_falsey_values(*args): return [val for val in args if val]

Whereas I'd expect something like

    def remove_falsey_values(l):
          for i in reversed(range(len(l))):
               if not l[i]: l.pop(i)
          # returned list is linked to input l 
          return l

    a = [1, 0, False, 'foo']
    x = remove_falsey_values(a)
    x[0] = 2
    print(a) # [2,'foo']