I am new to python, I am learning it through reading a book(Learn Python 3 the hard way). There is an exercise(exercise14)in the book can’t be run using iOS Pythonista 3.
The script is below:
from sys import argv
script, user_name = argv
prompt = '> '
print(f"Hi {user_name}, I'm the {script} script.")
print("I'd like to ask you a few questions.")
print(f"Do you like me {user_name}?")
likes = input(prompt)
print(f"Where do you live {user_name}?")
lives = input(prompt)
print("What kind of computer do you have?")
computer = input(prompt)
print(f"""
Alright, so you said {likes} about liking me.
You live in {lives}. Not sure where that is.
And you have a {computer} computer. Nice.
""")
But then I got an error:
File "/private/var/mobile/Containers/Shared/AppGroup/726BC931-58AE-44A6-9BE5-067EF23667A4/Pythonista3/Documents/Untitled.py", line 2, in <module>
script, user_name = argv
ValueError: not enough values to unpack (expected 2, got 1)
Please help me to solve this problem , I am very new.
Thank you guys!
If you long-press the run ("play") button on Pythonista, you can add the command-line argument that your script is expecting (user name, the script name it gets by default).
Related
I am building a dart program to get the user input. when running the program using the run button I get the output in the output window but I cannot type in it. tried using the terminal to run the program and it worked well. so I want to know what is the right way to take the input from the user?
import 'dart:io';
void main() {
print("enter your name: ");
var name = stdin.readLineSync();
print("hello mrs ${name}");
}
From file -> Preferences -> Settings
search for "Dart: Cli Console"
Dart: Cli Console
Then change the drop-down menu into -terminal-
now you can run again your code and check
you can type in the terminal and your code will work.
In fact the right way using terminal as you did. It's not a fail. It's just how it works.
The answer regarding using the correct vs-code console is correct but you should also check out the dcli package and it's ask function.
Disclaimer: I'm the author of dcli.
So I installed a Docker Wikibase instance and imported a dump from a WAMP64 Wikibase instance. It imported correctly and everything seems to work, except I can't create new items or properties anymore and I always get a "Could not create a new page. It already exists." error.
Any ideas on how to diagnose or fix? I'm thinking the it's trying to create an item "Q1" where a "Q1" already exists maybe? Any help would be much appreciated!
I figured it out!
Thanks to step 4 here (https://wikibase.consulting/transferring-wikibase-data-between-wikis/), I found out I was right and that Wikibase was trying to create a Q1 where a Q1 already existed. Therefore, I just needed to move the counter to the appropriate number.
Luckily, the above link has access to a script which will do this quick and easy. You can download the link into the root directory of the Wikibase instance using:
curl https://gist.githubusercontent.com/JeroenDeDauw/c86a5ab7e2771301eb506b246f1af7a6/raw/rebuildWikibaseIdCounters.sql -o rebuildWikibaseIdCounters.sql
And execute it with:
php maintenance/sql.php rebuildWikibaseIdCounters.sql
Super fast and painless!
(The raw script is also available here if curl isn't an option for some reason: https://gist.githubusercontent.com/JeroenDeDauw/c86a5ab7e2771301eb506b246f1af7a6/raw/88cdccb1adcdf420d17a3a21296a99f153b95a21/rebuildWikibaseIdCounters.sql)
This is what the script looks like in full:
-- By Jeroen De Dauw / https://Professional.Wiki
-- License: GPL-2.0-or-later
SELECT * FROM /*_*/wb_id_counters;
REPLACE INTO /*_*/wb_id_counters VALUE((SELECT COALESCE(MAX(CAST(SUBSTRING(`page_title`, 2) AS UNSIGNED)), 0) FROM `page` WHERE `page_namespace` = 120), 'wikibase-item');
REPLACE INTO /*_*/wb_id_counters VALUE((SELECT COALESCE(MAX(CAST(SUBSTRING(`page_title`, 2) AS UNSIGNED)), 0) FROM `page` WHERE `page_namespace` = 122), 'wikibase-property');
SELECT * FROM /*_*/wb_id_counters;
I'm trying to run the brilliant Mar I/O artificial intelligence written in Lua (more on this at https://youtu.be/qv6UVOQ0F44)
The AI runs successfully in the Lua (v.5.1) console of the BizHawk emulator (v.2.1.1), but I'm getting an error when trying to reload a previous state of the algorithm.
After opening the file, it seems like file:read("*number") will always return 0, whereas read("*all") and "*line" both read the content correctly. I've also tried "*n" with no luck.
Full script at: https://pastebin.com/ZZmSNaHX
function loadFile(filename)
local file = io.open(filename, "r")
pool = newPool()
pool.generation = file:read("*number")
pool.maxFitness = file:read("*number")
...
function writeFile(filename)
local file = io.open(filename, "w")
file:write(pool.generation .. "\n")
file:write(pool.maxFitness .. "\n")
...
The file generated starts with:
18[LF]
1938[LF]
...
But still, I only see 0s in the console:
console.writeline("Gen " .. pool.generation) --> "Gen 0"
console.writeline("Max Fitness " .. pool.maxFitness) --> "Max Fitness 0"
What's also puzzling is that this script has been discussed in different forums and no one seems to report the same issue.
I found out that the BizHawk emulator is using a customized version of Lua.
This issue appeared in version 2.1.1 of the emulator. Previous releases are working fine.
Thanks for your help community
The format to read a number is 'n', file:read('n'). See https://www.lua.org/manual/5.3/manual.html#pdf-file:read for details on read() format specifiers.
Around that time, BizHawk added an alternate c# lua implementation 'kopilua' in an effort to workaround deep crashy problems. One of kopilua's several shortcomings is noncompliant string parsing and file IO. You must use config > customize > advanced > Lua+LuaInterface in order to use normal lua; it won't have this problem.
I am writing a code in Lua to read from a serial port, but when I read I receive an echo back with the code :
print("Dragino Uart Test started\n")
while 1 do
serialin=io.open("/dev/ttyS0","r")
print(serialin:read()) --print the data
serialin:close()
end
When I open minicom to send him some data, I enable local echo than I type "text" and I see :
tteexxtt
Then I need to press enter to see my message in my lua script.
I am using a OpenWRT in a Dragino.
It seems that it is like a prompt command that you type every thing that you see and you need to press enter to send you command.
There is any other way to read and write to/from a serial port?
Can somebody help me please? Thank you so much!
The read method with no arguments reads a full line. That's why you need to press enter at the end of the text. Try reading one byte at a time with :read(1) or all of it with :read("*a").
I don know if this is still an issue to someone but maybe this helps a few people. Like lhf said :read(1) is a gread way of doing this. I had a few problems with :read("*a") though. In my opinion the easiest way of doing this is to append the answer piece by piece like:
rserial=io.open("/dev/ttyS0",'r')
lines = ""
repeat
local line=rserial:read(1)
if string.sub(line, 0, 3) == "OED" then --OED is here the stream ending. This can vary
EOD = true
rserial:close()
elseif line then
lines = lines .. line
end
until EOD == true
print (lines)
I'm trying to script a lua file to check if a certain file is open. Then I want it to close that file if it is open. I know how to check if the file exist but I need to know how to check if the file is open, meaning the file is running.
Lua, like C, C++, and pretty much every other language, can only close files that it opens itself. You cannot close files open by other people (not with standard Lua calls); this would be incredibly rude.
So you can't test to see if a file is opened by someone else. Nor can you close their file. There may be system API calls you could make to do this, but you would have to give Lua scripts access to those APIs yourself. Lua's standard libraries can't do this.
Sounds like you want to check which if any programs have a given file open.
first thing that comes to mind is parsing the output of lsof on linux.
fd = io.popen("lsof path/to/my/file")
fileopened = (#fd:read("a*") > 0)
Kind of a hacky way to do it, but it works:
processname = "process_name_here.exe"
filedata = io.popen("tasklist /NH /FO CSV /FI \"IMAGENAME eq "..processname.."\"")
output = filedata:read()
filedata:close()
if output ~= "INFO: No tasks are running which match the specified criteria." then
-- Program is running. Close the program
os.execute("taskkill -im "..processname)
else
-- Program is not running
end
Just make sure to replace "process_name_here.exe" with the process name that shows up in task manager
Alternatively you can just use this to close it without checking if it was actually running:
os.execute("taskkill -im process_name_here.exe")