I'm coming from R + Rstudio. In RStudio, you can save objects to an .RData file using save()
save(object_to_save, file = "C:/path/where/RData/file/will/be/saved.RData")
You can then load() the objects :
load(file = "C:/path/where/RData/file/was/saved.RData")
I'm now using Spyder and Python3, and I was wondering if the same thing is possible.
I'm aware everything in the globalenv can be saved to a .spydata using this :
But I'm looking for a way to save to a .spydata file in the code. Basically, just the code under the buttons.
Bonus points if the answer includes a way to save an object (or multiple objects) and not the whole env.
(Please note I'm not looking for an answer using pickle or shelve, but really something similar to R's load() and save().)
(Spyder developer here) There's no way to do what you ask for with a command in Spyder consoles.
If you'd like to see this in a future Spyder release, please open an issue in our issues tracker about it, so we don't forget to consider it.
Considering the comment here, we can
rename the file from .spydata to .tar
extract the file (using file manager, for example). It will deliver a file .pickle (and maybe a .npy)
extract the objects saved from the environment:
import pickle
with open(path, 'rb') as f:
data_temp = pickle.load(f)
that object will be a dictionary with the objects saved.
Related
A sensor provides a stream of frames containing object coordinates, which are stored in ProtoBuf format in a gzipped file. I would like to read this file in Julia.
Using protoc, I have generated the Protobuf files for both Python and Julia, coordinate_push.py and coordinate_push.jl
My Python code is as follows:
frameList = []
with gzip.open(filePath) as f:
data = f.read()
next_pos, pos = 0, 0
while pos < len(data):
msg = coordinate_push.CoordinatesFrame()
next_pos, pos = _DecodeVarint32(data, pos)
msg.ParseFromString(data[pos:pos + next_pos])
frameList.append(msg)
pos += next_pos
I'd like to rewrite the above in Julia, and don't know where to start. Part of the problem is that I haven't fully understood the Python script (IO is not my strong point).
I understand that I need:
to open the gzip file, presumably using using GZip; file = GZip.open(file_path, "r")
to read in the data, along the lines of using ProtoBuf; data = readproto(iob, CoordinatesFrame())
What I don't understand is:
how to define iob, and especially how to link it to file (in the Julia Protobuf manual, we had iob = PipeBuffer(), but here it's a gzip-file that we'd like to read)
how to replicate the while-loop in Julia, and in particular the mysterious _DecodeVarint32 (I'm on Windows, if it's related to that.)
whether the file coordinate_push.jl has to be in the same directory as my main file, and if not, how I can properly import it (it is currently in a proto subfolder, and in Python I'd import it using from src.proto import coordinate_push)
Insight on any of the three points would be highly appreciated.
You should open an issue on the Gzip GitHub repo and ask this first part of your question there (I am not a Gzip expert unfortunately).
On the second point, I suggest looking here: https://github.com/JuliaIO/FileIO.jl/blob/master/README.md for lots of examples of FileIO loops which seems exactly what you need to replicate that Python loop. For the second part of this question, you best bet for that function is to try and hunt down the definition on GitHub or in the docs somewhere.
For the 3rd questions, coordinate_push.jl does not need to be in the same folder as your "main file" (I am not sure what you mean by this so perhaps it would help to add context on the structure of your files). To import that file all you need to do is add include("path/to/coordinate_push.jl") at the top of the file you want to call/run the code from. It's worth noting that the path can either be the absolute path or the relative project path (in some cases).
I am working on an idea. I need a bit help here, as I don't have in depth knowledge of python modules(I mean I don't know all the python modules). Take a look at the code
file = open('Data.txt', 'w')
a = input('Enter your name in format F|M|L: ')
file.write(a)
file.close()
The above code opens a file which writes my data to it. However I want to edit the document only through python and not through opening it from saved location. Shortly I want to disable editions done by opening the file in text-editors.
If your OS is Windows, the most straightforward option is to make the file read-only when your script is done. And set the read-only flag to false while your script is running. There are some ways to modify file permissions using pywin32 library, but it's complicated and hard to find good examples.
import os
from stat import S_IWRITE, S_IREAD
fname = 'test.txt'
# if file exists, reset read only to false (allow write)
if os.path.isfile(fname):
os.chmod(fname, S_IWRITE)
fid = open(fname, 'w')
fid.write('shoobie doobie')
fid.close()
It's already been pointed out in the comments, this technique won't stop a determined person from changing the read only attribute.
If text-editor is all your concern, use 'wb' instead of 'w'.
Use 'rb' to open those files too.
I am trying to open a pdf to get the number of pages. I am using PyPDF2.
Here is my code:
def pdfPageReader(file_name):
try:
reader = PyPDF2.PdfReader(file_name, strict=True)
number_of_pages = len(reader.pages)
print(f"{file_name} = {number_of_pages}")
return number_of_pages
except:
return "1"
But then i run into this error:
PdfReadWarning: Xref table not zero-indexed. ID numbers for objects will be corrected. [pdf.py:1736]
I tried to use strict=True and strict=False, When it is True, it displays this message, and nothing, I waited for 30minutes, but nothing happened. When it is False, it just display nothing, and that's it, just do nothing, if I press ctrl+c on the terminal (cmd, windows 10) then it cancel that open and continues (I run this in a batch of pdf files). Only 1 in the batch got this problem.
My questions are, how do I fix this, or how do I skip this, or how can I cancel this and move on with the other pdf files?
If somebody had a similar problem and it even crashed the program with this error message
File "C:\Programy\Anaconda3\lib\site-packages\PyPDF2\pdf.py", line 1604, in getObject
% (indirectReference.idnum, indirectReference.generation, idnum, generation))
PyPDF2.utils.PdfReadError: Expected object ID (14 0) does not match actual (13 0); xref table not zero-indexed.
It helped me to add the strict argument equal to False for my pdf reader
pdf_reader = PdfReader(input_file, strict=False)
For anybody else who may be running into this problem, and found that strict=False didn't help, I was able to solve the problem by just re-saving a new copy of the file in Adobe Acrobat Reader. I just opened the PDF file inside an actual copy of Adobe Acrobat Reader (the plain ol' free version on Windows), did a "Save as...", and gave the file a new name. Then I ran my script again using the newly saved copy of my PDF file.
Apparently, the PDF file I was using, which were generated directly from my scanner, were somehow corrupt, even though I could open and view it just fine in Reader. Making a duplicate copy of the file via re-saving in Acrobat Reader somehow seemed to correct whatever was missing.
I had the same problem and looked for a way to skip it. I am not a programmer but looking at the documentation about warnings there is a piece of code that helps you avoid such hindrance.
Although I wouldn't recomend this as a solution, the piece of code that I used for my purpose is (just copied and pasted it from doc on link)
import sys
if not sys.warnoptions:
import warnings
warnings.simplefilter("ignore")
This happens to me when the file was created in a printer / scanner combo that generates PDFs. I could read in the PDF with only a warning though so I read it in, and then rewrote it as a new file. I could append that new one.
from PyPDF2 import PdfMerger, PdfReader, PdfWriter
reader = PdfReader("scanner_generated.pdf", strict=False)
writer = PdfWriter()
for page in reader.pages:
writer.add_page(page)
with open("fixedPDF.pdf", "wb") as fp:
writer.write(fp)
merger = PdfMerger()
merger.append("fixedPDF.pdf")
I had the exact same problem, and the solutions did help but didn't solve the problem completely, at least the one setting strict=False & resaving the document using Acrobat reader.
Anyway, I still got a stream error, but I was able to fix it after using an PDF online repair. I used sejda.com but please be aware that you are uploading your PDF on some website, so make sure there is nothing sensible in there.
if __name__ == "__main__":
with open("log.txt", 'r') as f:
content = f.readlines()
for i, line in enumerate(content):
I am using above code to read text file. But it only gets current data
Depending on operating system, you have a couple of choices.
Check if the file has changed since last time.
In Linux there is this "new" functionality that will inform you of changes made to a file.
It was a while back since I tried to work with something similar and guess what, there is this package you can use that has solved this problem.
I believe it was this package I used, not sure. But the documentation claims to give you some methods to use:
http://pythonhosted.org/watchdog/
That's it:
I read successfully a DICOM file with itk::ImageFileReader.
Now I want to export an image.
I use vtkJPEGWriter.
When I add the line
vtkJPEGWriter* writer = vtkJPEGWriter::New();
even if that code doesn't run at the beginning of execution... I can't read the file. I comment the line, then I read the file again.
But the writer is not connected with the file reader. I don't get it. It has nothing to do at that moment!!
I'm wasting so much time, just trying to figure out what's the problem.
The problem is in the file. I don't know why it works with that file without that line. Really weird.
I just don't get it.
I will try with other files.
These lines are worked for me:
vtkSmartPointer<vtkJPEGWriter> JPEGWriter = vtkSmartPointer<vtkJPEGWriter>::New();
JPEGWriter->SetFileName("d:\\Tempx\\Pacienttest3\\Sagital.bmp");
JPEGWriter->SetInputConnection(m_pColor->GetOutputPort());
JPEGWriter->Write();
where m_pColor is kind of vtkImageMapToColors type ...