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:...

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.

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...

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 keyw...

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 how ARG …

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 something li...

Aug 17, 2012 · So there is no "choice" between sys.argv and *arg. *arg is syntax used for unpacking a list (or other sequence) to pass as multiple arguments to a call. You can use this syntax when …

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 to …

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.

Warning for later people: for passwords, you might consider using a secret manager (Vault, k8s secrets, aws sms, docker swarm secrets) instead of a build arg to avoid security breaches. A build-time arg …