The syntax is the * and **. The names *args and **kwargs are only by convention but there's no hard requirement to use them. You would use *args when you're not sure how many …

I am trying to pass a list as an argument to a command line program. Is there an argparse option to pass a list as option? parser.add_argument('-l', '--list', type=list, acti...

The variables are named argc (argument count) and argv (argument vector) by convention, but they can be given any valid identifier: int main(int num_args, char** arg_strings) is equally valid.

What exactly do *args and **kwargs mean? According to the Python documentation, from what it seems, it passes in a tuple of arguments. def foo (hello, *args): print (hello) for each in args:...

Mar 19, 2019 · The ARG defines a variable to be used inside the dockerfile in subsequent commands. The ENV defines an environment variable which is passed to the container.

Feb 28, 2020 · ARG before the first FROM are only useful to allow variables in the FROM line and to supply defaults, but can't be used otherwise. This is further discussed under Understand …

Parameters starting with - or -- are usually considered optional. All other parameters are positional parameters and as such required by design (like positional function arguments). It is possible …

I am using RUN instruction within a Dockerfile to install a rpm RUN yum -y install samplerpm-2.3 However, I want to pass the value "2.3" as an argument. My RUN instruction should look …

Apr 27, 2017 · Accepted answer does not cover "if else condition" part of the question. Would be better to rename it to "Dockerfile with external arguments" if condition check didn't mean to be …

According to "docker build --help" the --build_arg is described as a list. it isn't really specifying a list if I have to repeat the entire argument over and over with a single value each time.