args

问题 I want to run a click subcommand with variadic arguments that are going to be used to instantiate a class Foo(*args) on main() group command in order to create an instance of Foo() to be used by its subcommands so that it aligns with the way click works: $ python foo.py subcommand arg1 arg2 ... argN This question is based on my initial question and @StephenRauch answer. import click class Foo(object): def __init__(self, *args): self.args = args def log(self): print('self.args:', self.args)

问题 In Python, is it possible to get the command line arguments without importing sys (or any other module)? 回答1: Yes, if you're using Linux. If you know the process ID, you can read its /proc/{pid}/cmdline file, which contains a null-separated list of the command line arguments: PROCESS_ID = 14766 cmdline = open("/proc/" + str(pid) + "/cmdline").read() print cmdline.split("\0") But it's hard to know the process ID before you start the process. But there's a solution! Look at ALL of the processes

问题 This question already has answers here : Calling a Python function with *args,**kwargs and optional / default arguments (2 answers) Closed last year . I'm trying to wrap my head around using args and kwargs in Python 3 (Python 3.7.0) but I'm running into some issues with my understanding. Here is a simple function I have: def add_args(y=10, *args, **kwargs): return y, args, kwargs And test it to see what is returned: print(add_args(1, 5, 10, 20, 50)) print(add_args()) >> (1, (5, 10, 20, 50),

问题 I've got an error as a traceback below: Traceback (most recent call last): File "setup_rouge.py", line 7, in <module> from files2rouge import settings File "/home/cerdas/files2rouge/files2rouge/__init__.py", line 2, in <module> from files2rouge.files2rouge import main File "/home/cerdas/files2rouge/files2rouge/files2rouge.py", line 17, in <module> from files2rouge import utils File "/home/cerdas/files2rouge/files2rouge/utils.py", line 14 print(*args, **kwargs) ^ SyntaxError: invalid syntax

问题 How can I pass command line args to sql files ran with psql (Postgres)? i.e. psql mydatabase < mysqlfile.sql arg1 arg2 arg3... Is this possible? 回答1: Use variable interpolation feature in psql. If you specify -v variable1=value1 or --set variable1=value1 parameter on command line, then :variable1 in the sql file will be replaced with corresponding text value. Note: use standard-SQL quoted strings if you need quotes, spaces and so on. Example: echo "SELECT :arg1 FROM :arg2 LIMIT 10;" > script

问题 This may be a basic question, but unfortunately I was not able to get anything while searching. I have a function which uses *args to capture arguments when the function is run on the command line. An basic structure is given below : def func(*args): <code starts> ... </code ends> func("arg1", "arg2", "arg3") The problem here is, the code works if I pass the arguments in the code file itself as seen in the above snippet. I was looking on how to actually run this code from command line with

问题 Let me explain my question, what I want to do is: From the command line calling gvim without arguments, want NERDTree open by default in my /home/user/Documents folder. From the command line calling gvim . want to open NERDTree with the directory set to the actual directory where the command was executed from. BUT I still want NERDTree on the left and a empty buffer in the right (not NERDTree being the only window just like normally happens). From the command line calling gvim /some/path/to

问题 Is it possible to pass *args to string.format? I have the following function: @classmethod def info(cls, component, msg, *args): """Log an info message""" cls.__log(cls.Level.INFO, component, msg, args) @classmethod def __log(cls, level, component, msg, *args): """Log a message at the requested level""" logging.getLogger("local").log(level, " - ".join([component, msg.format(args)])) When I try unit test it with LogCapture I get the following: def test_logWithArgs(self): Logger.level(Logger

问题 I can send callback param(s) and it works perfectly as long as I am only sending some primitive types like String. But the same thing does not work for even the simplest POJO. PrimeFaces guide says that the RequestContext.addCallbackParam() method can handle POJOs and it coverts them into JSON. I don't know why it's not working in my case. Has anybody done that? 回答1: Solution found! --------------------------------------------------------------------- I did some research and found the answer

问题 I need a function which would be taking variadic arguments . The number of arguments may vary from 1 to N. def abc(*args): print "ABC" print args print len(args) def abc1(*args): print "ABC1" print args print len(args) print "------------" tup = ("Hello123") abc(*tup) abc1(tup) tup = ("Hello123", "Hello1234") abc(*tup) abc1(tup) The ouput of the above program is; ABC ('H', 'e', 'l', 'l', 'o', '1', '2', '3') 8 ABC1 ('Hello123',) 1 ------------ ABC ('Hello123', 'Hello1234') 2 ABC1 (('Hello123',