So I've got the following code causing issues:
if File.file?(indexPath)
puts "Have to move index"
File.rename(indexPath, "#{indexPath}.old")
end
File.new(indexPath)
File.write(indexPath, "test" )#handler.getDoc)
sleep 60.second
I would assume that this would check if the file exists, and back it up before writing a new index.html. Instead, I get the following runtime error:
Error opening file './assets/index.html' with mode 'r': No such file or directory (Errno)
0x10098ab45: *CallStack::unwind:Array(Pointer(Void)) at ??
0x10098aae1: *CallStack#initialize:Array(Pointer(Void)) at ??
0x10098aab8: *CallStack::new:CallStack at ??
0x10097c001: *raise<Errno>:NoReturn at ??
0x1009c9dd9: *File#initialize<String, String, Int32, Nil, Nil>:(Event::Event | Nil) at ??
0x1009cbba9: *File#initialize<String>:(Event::Event | Nil) at ??
0x1009cbb51: *File::new<String>:File at ??
0x10097148b: __crystal_main at ??
0x100981758: main at ??
File.new creates a new instance of the File class, not a new file. Since you give it no further arguments it tries to open the given file in read mode, you just moved it away so that fails.
To create an empty file one would use File.touch, however opening a file in write mode, which File.write internally does, creates the file when it does not exist.
So just removing the call to File.new should work fine.
Related
This code was suppose tu sort my desktop , path =/Users/nicolas/Desktop/prova/
and it works properly if the destination folder doesnt exist and the program create it ,
else if there is already a folder with the same name it give an error when he tries to move the files and it says
complete output:
.DS_Store
nltks
png
Scherm.png
Schermata 2018-03-28 alle 11.07.13.png
DS_Store
nltks
png
png
Traceback (most recent call last):
File "/Users/nicolas/Desktop/tts/work in progress/sorting machine.py", line 16, in
shutil.move(path+names[x],path+currentexp)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/shutil.py", line 292, in move
raise Error, "Destination path '%s' already exists" % real_dst
shutil.Error: Destination path '/Users/nicolas/Desktop/prova/png/Scherm.png' already exists
iMac:w
but i ve not any file in it with the ds_store estension and the "nltk" is just a folder that shouldnt move .
program
import os
import shutil
path = "/Users/nicolas/Desktop/prova/"
names = os.listdir(path)
for x in range (0,len(names)):
print names[x]
for x in range (0,len(names)):
exp = names[x].split(".")
currentexp = exp[-1]
print (currentexp)
if os.path.exists(path+currentexp):
shutil.move(os.path.join(path, names[x]), os.path.join(path,currentexp))
else:
os.makedirs(path+currentexp)
shutil.move(os.path.join(path, names[x]), os.path.join(path,currentexp))
# if names[x] not in os.path.exists(path+currentexp):
# shutil.move(path+names[x],path+curentexp)
thanks for the help
from the documentation:
If the destination is an existing directory, then src is moved inside that directory. If the destination already exists but is not a directory, it may be overwritten depending on os.rename() semantics
To sum it up, if the image exists in the target dir, and both source & target dirs are on the same filesystem, shutil.move can use os.rename, and os.rename fails because you cannot rename an object with the name of an already existing one. You have to delete the target first.
Here's how I'd rewrite it:
target_dir = os.path.join(path,currentexp)
if not os.path.exists(target_dir):
os.makedirs(target_dir)
try:
os.remove(os.path.join(target_dir, names[x]))
except OSError:
pass # cannot remove or doesn't exist, ignore
shutil.move(os.path.join(path, names[x]), target_dir)
this simpler code tries to delete the target file before performing shutil.move. Of course os.remove can fail, failure is trapped, then shutil.move fails because of another error, but that's beyond our scope
I'm having trouble printing a table to a file with lua (and I'm new to lua).
Here's some code I found here to print the table;
function print_r ( t )
local print_r_cache={}
local function sub_print_r(t,indent)
if (print_r_cache[tostring(t)]) then
print(indent.."*"..tostring(t))
else
print_r_cache[tostring(t)]=true
if (type(t)=="table") then
for pos,val in pairs(t) do
if (type(val)=="table") then
print(indent.."["..pos.."] => "..tostring(t).." {")
sub_print_r(val,indent..string.rep(" ",string.len(pos)+8))
print(indent..string.rep(" ",string.len(pos)+6).."}")
elseif (type(val)=="string") then
print(indent.."["..pos..'] => "'..val..'"')
else
print(indent.."["..pos.."] => "..tostring(val))
end
end
else
print(indent..tostring(t))
end
end
end
if (type(t)=="table") then
print(tostring(t).." {")
sub_print_r(t," ")
print("}")
else
sub_print_r(t," ")
end
print()
end
I have no idea where the 'print' command goes to, I'm running this lua code from within another program. What I would like to do is save the table to a .txt file. Here's what I've tried;
function savetxt ( t )
local file = assert(io.open("C:\temp\test.txt", "w"))
file:write(t)
file:close()
end
Then in the print-r function I've changed everywhere it says 'print' to 'savetxt'. This doesn't work. It doesn't seem to access the text file in any way. Can anyone suggest an alternative method?
I have a suspicion that this line is the problem;
local file = assert(io.open("C:\temp\test.txt", "w"))
Update;
I have tried the edit suggested by Diego Pino but still no success. I run this lua script from another program (for which I don't have the source), so I'm not sure where the default directory of the output file might be (is there a method to get this programatically?). Is is possible that since this is called from another program there's something blocking the output?
Update #2;
It seems like the problem is with this line:
local file = assert(io.open("C:\test\test2.txt", "w"))
I've tried changing it "C:\temp\test2.text", but that didn't work. I'm pretty confident it's an error at this point. If I comment out any line after this (but leave this line in) then it still fails, if I comment out this line (and any following 'file' lines) then the code runs. What could be causing this error?
I have no idea where the 'print' command goes to,
print() output goes to default output file, you can change that with io.output([file]), see Lua manuals for details on querying and changing default output.
where do files get created if I don't specify the directory
Typically it will land in current working directory.
Your print_r function prints out a table to stdout. What you want is to print out the output of print_r to a file. Change the print_r function so instead of printing to stdout, it prints out to a file descriptor. Perhaps the easiest way to do that is to pass a file descriptor to print_r and overwrite the print function:
function print_r (t, fd)
fd = fd or io.stdout
local function print(str)
str = str or ""
fd:write(str.."\n")
end
...
end
The rest of the print_r doesn't need any change.
Later in savetxt call print_r to print the table to a file.
function savetxt (t)
local file = assert(io.open("C:\temp\test.txt", "w"))
print_r(t, file)
file:close()
end
require("json")
result = {
["ip"]="192.168.0.177",
["date"]="2018-1-21",
}
local test = assert(io.open("/tmp/abc.txt", "w"))
result = json.encode(result)
test:write(result)
test:close()
local test = io.open("/tmp/abc.txt", "r")
local readjson= test:read("*a")
local table =json.decode(readjson)
test:close()
print("ip: " .. table["ip"])
2.Another way：
http://lua-users.org/wiki/SaveTableToFile
Save Table to File
function table.save( tbl,filename )
Load Table from File
function table.load( sfile )
So running into an issue with my code here not sure what exactly i'm doing wrong i pass it the two arguments it searches for the file but its always going to does not exist.
i pass this to the file
perl restore.cgi users_old_52715.tar.gz Ace_Walker
its not finding the file it exist i assure you.
#!/usr/bin/perl
use Archive::Tar;
my $tarPath = $ARGV[0];
my $playerfile = $ARGV[1].".ini";
my $tar = Archive::Tar->new($tarPath);
if ($tar->contains_file($playerfile)) {
$tar->read($tarPath);
$tar->extract_file($playerfile, './' );
print "Successfully restored $playerfile to production enviroment\n";
exit 0;
}else{
print $playefile." does not exist in this archive!\n";
exit 0;
}
Just writing Scott Hunter's comment as an answer:
Try using an absolute path instead of a relative one.
if( $tar->extract_file($playerfile, './'.$playerfile )){
print "Successfully restored $playerfile to production enviroment\n";
}
exit 0;
man Archive::Tar :
$tar->extract_file( $file, [$extract_path] )
Write an entry, whose name is equivalent to the file name provided to disk. Optionally takes a second parameter, which is the full native path (including filename) the entry will be written to.
while executing, I have this error ?? Error using ==> fread
Invalid file identifier. Use fopen to generate a valid file identifier. fid is equal to -1 but the file does exist.
what shall I do?
seq=dir('C:\Windows\system32\config\systemprofile\Desktop\pfe\code final version 1\nor\info');
N=[];
for i = 3 : length(seq)
disp(seq(i).name)
cd 'C:\Windows\system32\config\systemprofile\Desktop\pfe\code final version 1\nor\info'
fin = fopen('seq(i).name','r');
[x,count]=fread(fin,'char=>char');
cd 'C:\Windows\system32\config\systemprofile\Desktop\pfe\code final version 1'
M=fichier(fin,x);
N=[N;M];
end
xlswrite('info.xls',N);
As you put '' around the name, you are trying to open a file called seq(i).name, remove the '' and you are using the variable named seq(i).name
fin = fopen(seq(i).name,'r');
I am having some serious trouble getting a Python 2 based C++ engine to work in Python3. I know the whole IO stack has changed, but everything I seem to try just ends up in failure. Below is the pre-code (Python2) and post code (Python3). I am hoping someone can help me figure out what I'm doing wrong.I am also using boost::python to control the references.
The program is supposed to load a Python Object into memory via a map and then upon using the run function it then finds the file loaded in memory and runs it. I based my code off an example from the delta3d python manager, where they load in a file and run it immediately. I have not seen anything equivalent in Python3.
Python2 Code Begins here:
// what this does is first calls the Python C-API to load the file, then pass the returned
// PyObject* into handle, which takes reference and sets it as a boost::python::object.
// this takes care of all future referencing and dereferencing.
try{
bp::object file_object(bp::handle<>(PyFile_FromString(fullPath(filename), "r" )));
loaded_files_.insert(std::make_pair(std::string(fullPath(filename)), file_object));
}
catch(...)
{
getExceptionFromPy();
}
Next I load the file from the std::map and attempt to execute it:
bp::object loaded_file = getLoadedFile(filename);
try
{
PyRun_SimpleFile( PyFile_AsFile( loaded_file.ptr()), fullPath(filename) );
}
catch(...)
{
getExceptionFromPy();
}
Python3 Code Begins here: This is what I have so far based off some suggestions here... SO Question
Load:
PyObject *ioMod, *opened_file, *fd_obj;
ioMod = PyImport_ImportModule("io");
opened_file = PyObject_CallMethod(ioMod, "open", "ss", fullPath(filename), "r");
bp::handle<> h_open(opened_file);
bp::object file_obj(h_open);
loaded_files_.insert(std::make_pair(std::string(fullPath(filename)), file_obj));
Run:
bp::object loaded_file = getLoadedFile(filename);
int fd = PyObject_AsFileDescriptor(loaded_file.ptr());
PyObject* fileObj = PyFile_FromFd(fd,fullPath(filename),"r",-1,"", "\n","", 0);
FILE* f_open = _fdopen(fd,"r");
PyRun_SimpleFile( f_open, fullPath(filename) );
Lastly, the general state of the program at this point is the file gets loaded in as TextIOWrapper and in the Run: section the fd that is returned is always 3 and for some reason _fdopen can never open the FILE which means I can't do something like PyRun_SimpleFile. The error itself is a debug ASSERTION on _fdopen. Is there a better way to do all this I really appreciate any help.
If you want to see the full program of the Python2 version it's on Github
So this question was pretty hard to understand and I'm sorry, but I found out my old code wasn't quite working as I expected. Here's what I wanted the code to do. Load the python file into memory, store it into a map and then at a later date execute that code in memory. I accomplished this a bit differently than I expected, but it makes a lot of sense now.
Open the file using ifstream, see the code below
Convert the char into a boost::python::str
Execute the boost::python::str with boost::python::exec
Profit ???
Step 1)
vector<char> input;
ifstream file(fullPath(filename), ios::in);
if (!file.is_open())
{
// set our error message here
setCantFindFileError();
input.push_back('\0');
return input;
}
file >> std::noskipws;
copy(istream_iterator<char>(file), istream_iterator<char>(), back_inserter(input));
input.push_back('\n');
input.push_back('\0');
Step 2)
bp::str file_str(string(&input[0]));
loaded_files_.insert(std::make_pair(std::string(fullPath(filename)), file_str));
Step 3)
bp::str loaded_file = getLoadedFile(filename);
// Retrieve the main module
bp::object main = bp::import("__main__");
// Retrieve the main module's namespace
bp::object global(main.attr("__dict__"));
bp::exec(loaded_file, global, global);
Full Code is located on github: