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Questions tagged [bytesio]

A stream implementation using an in-memory bytes buffer.

Refer to BytesIO class details in Python's docs.

258 questions
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How to concatenate bytesio object in python?

I created a main bytesIO object that will concatenate additional bytesIO object. csv_file = BytesIO for _ in range(iterations): sliced_queryset = queryset[start_index:end_index] serialized = serializer(sliced_queryset,…
juicymango
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Saving zip file in python to disk

I have a bytea object in a database which is a zip file, I can retrieve it and read it as a zip file, but I also want to save it to disk. I can't work out how to write zf_model to disk. I've also tried zf.write(io.BytesIO(model.model_file)), i.e.…
yahop19531
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loading numpy array from bytesIO

I'm trying to load an io bytes stream into a numpy array. np.frombuffer() returns an array with too many elements and np.load() throws the error "UnicodeDecodeError: 'utf-8' codec can't decode byte 0x93 in position 0: invalid start byte" Can anyone…
nallekavn
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problem with line terminator \n on dataframe and .csv

Im getting (with an python API) a .csv file from an email attachment that i received in gmail, transforming it into a dataframe to make some dataprep, and saving as .csv on my pc. It is working great, the problem is that i get '\n' on some…
Felipe Ribeiro
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Error while sending an image in response [FLASK]

I have an image file on a server that is protected by Windows Authentication which I have to access. I used the requests_ntlm module of python to access the file with Windows Auth, which I was able to. However, on sending this data back as an image,…
Naman Sharma
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PIL - saving file in memory?

I just want to open the image files in a folder, and convert them to jpeg if they are not already jpeg. Only thing is I need to save the file in memory, not to file. The reason is, in fact I'm reading the images from tfrecod file (tensorflow data…
Ahmet Cetin
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XlsxWriter: Why does in_memory give a corrupt byte sequence?

I am generating an excel file and returning it for download in a flask app. If I use 'in_memory': True then the file is corrupt and excel can't open it. The same code if written directly to disk works. For the in-memory code I'm following this…
Eric Grunzke
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Trying to display images with PIL and BytesIO but returns nothing

I'm trying to display the logos from a dataset. The dataset looks like this: Player Club Logo tom https://abc.png jerry https://def.png peter https://frf.png woody https://awt.png However, it didnt return me…
Jonathan
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Load numpy arrays from compressed bytes

I'm trying to save (using savez_compressed) a bunch of numpy arrays into a BytesIO object and then load them back to a variable. So far, I can save the array's using following code # Arrays a = numpy.random.uniform(size=(10,10)) # dtype is float64 b…
Rikard Olsson
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Convert PIL Image to Bytes, getting Error

The solutions I have found said to: from PIL import Image import io img = "1.jpg" image = Image.open(img) # ... other processing... buf = io.BytesIO() image.save(buf, format="JPEG") buf.get_value() But I get the error: Traceback (most recent…
Lisa
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Open Image from requests.response.content

What I am trying to do is quite simple when dealing with a local file, but the problem comes when I try to do it with a remote URL. Basically, I am trying to create a PIL image object from a file extracted from a URL. Of course, I could always fetch…
Jacksuel Soares Braga
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Using BytesIO and Flask send_file

I need to process an xml file and send it back, storing all in-memory. I tried to use BytesIO as a file-like object. Initially, I tried this: with BytesIO() as file: data.write(file, encoding='windows-1251') return…
Alex
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A image converted with canvas fails to be read by python PIL _io.BytesIO

Python PIL rejects to read an image you have resized with Javascript canvas I resize an image on the client-side with Javascript: var reader = new FileReader(); reader.onload = function (e) { el('image-picked').src = e.target.result; …
brunosan
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Why isn't this string saving in the global variable?

I'm writing an app using Python and Kivy. I have a function that draws an image and exports it as a png. I'm trying to use that image and save it in a sql db as a BLOB. The route I'm trying to take is to convert the png in to a stream using BytesIO…
Cl0ud-l3ss
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Read with MXRecordIO from bytes object

Is there a way that I can use mx.recordio.MXRecordIO to read from a bytes object rather than a file object? For example I'm currently doing: import mxnet as mx results_file = 'results.rec' with open(results_file, 'wb') as f: …
Austin
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