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...

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.

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 …

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 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 …

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.

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 …

Here's the result: Any of the -o [ARG], -abo [ARG], --long-option [ARG] and --long-option=[ARG] styles of options are accepted; Arguments may occur in any order, only positional ones are left …

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 …