Python append() vs. += operator on lists, why do these give …
Python lists are heterogeneous that is the elements in the same list can be any type of object. The expression: c.append(c) appends the object c what ever it may be to the list. In the case it …
python - How do I list all files of a directory? - Stack Overflow
Jul 9, 2010 · That has consequences related to another keyword in the question: "add them into a list": In pre Python 2.2 versions, sequences (iterables) were mostly represented by lists …
How to list all installed packages and their versions in Python?
C:\Users\user>pyenv --version pyenv 2.64.11 C:\Users\name>pyenv pyenv 2.64.11 Usage: pyenv <command> [<args>] Some useful pyenv commands are: commands List all available pyenv …
python - if/else in a list comprehension - Stack Overflow
Since a list comprehension creates a list, it shouldn't be used if creating a list is not the goal; it shouldn't be used simply to write a one-line for-loop; so refrain from writing [print(x) for x in …
python - How do I make a flat list out of a list of lists? - Stack …
Dec 3, 2016 · A list of lists named xss can be flattened using a nested list comprehension: flat_list = [ x for xs in xss for x in xs ] The above is equivalent to: flat_list = [] for xs in xss: for x in xs: …
Best and/or fastest way to create lists in python
If you want to see the dependency with the length of the list n: Pure python. I tested for list length up to n=10000 and the behavior remains the same. So the integer multiplication method is the …
Python: list of lists - Stack Overflow
Jul 14, 2012 · list is the name of the built-in list constructor, and you're hiding its normal function. I will rename list to a in the following. Python names are references that are bound to objects. …
python - How to concatenate (join) items in a list to a single string ...
Sep 17, 2012 · @Wouter, it will not. On the one hand, only lists of strings can be joined; so list.join would be inappropriate for an arbitrary list. On the other, the argument of str.join can be any …
What is the difference between list [1] and list [1:] in Python?
Oct 5, 2012 · slicing is used to extract a sublist of a list where as indexing is used to retrive a specific element of list. slicedList = aList[beginIndex:endIndex] d[1:] refers to slicing the list d - …
python - How do I get the last element of a list? - Stack Overflow
May 30, 2009 · The simplest way to display last element in python is >>> list[-1:] # returns indexed value [3] >>> list[-1] # returns value 3 there are many other method to achieve such a goal but …