So I have difficulty with the concept of *args and **kwargs. So far I have learned that: *args = list of arguments - as positional arguments **kwargs = dictionary - whose keys become separate …

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.

In Python 2.x (I use 2.7), which is the proper way to use default arguments with *args and **kwargs? I've found a question on SO related to this topic, but that is for Python 3: Calling a …

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...

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 …

May 21, 2009 · That String[] args part may become optional in future versions of Java. Work is underway to allow for simplified declaration of main method. See JEP 463: Implicitly Declared …

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 …

This answer is very useful, it actually shows how docker-compose can be used with --build-arg on command-line, you can define your ARG in Dockerfile, docker-compose.yml - the :args array …

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.

This answer is great if you only need to check whether a build-arg is present and you want to set a default value. To improve this solution, in case you want to use the data passed by the build …