Apr 27, 2016 · I am 99.9% positive that any sequence type in higher-level languages will store its length. The len (or strlen or length) functions in Python, Perl, and Ruby (and other such …

May 10, 2018 · I mean, another answer is that it's the length of the iterable minus 1, or the amount of elements in a list minus 1, but the question is: what is really the question.

Oct 26, 2008 · The protocol in Python is to implement this method on objects which have a length and use the built-in len() function, which calls it for you, similar to the way you would …

Aug 19, 2013 · At least if you want it to work with the rest of python. See the Called to implement the built-in function len (). Should return the length of the object, an integer >= 0. Also, an …

from __future__ import print_function import sys print(sys.argv, len(sys.argv)) The script requires Python 2.6 or later. If you call this script print_args.py, you can invoke it with different …

Incidentally, if I convert l into an np.array first, np.mean takes ~.16s, so about 6x faster than sum(l)/len(l). Conclusion: if you're doing lots of calculations, best do everything in numpy.

15 %s indicates a conversion type of string when using Python's string formatting capabilities. More specifically, %s converts a specified value to a string using the str() function. Compare …

The Python range() function simply returns or generates a list of integers from some lower bound (zero, by default) up to (but not including) some upper bound, possibly in increments (steps) of …

Sep 7, 2017 · list(range(len(population_ages))) (in python 2, range(len(population_ages)) is even enough since it directly returns a list, but your code isn't portable to python 3 if you really need …

Jun 27, 2018 · 0 Indexes start from 0 in python, so if for example Mymessage has a value of 'hello', then range(len(Mymessage)) will produce an iterator that counts from 0 to 4 because …