A stream implementation using an in-memory bytes buffer.
Refer to BytesIO class details in Python's docs.
Questions tagged [bytesio]
258 questions
2
votes
1 answer
google cloud storage upload from bytes fails
I am trying to create a file on the fly in python and then upload this to google cloud storage but I am failing to be able to upload from a string or bytes object.
The basic setup of the script is
from google.cloud import storage
storage_client =…
Charlie Morton
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- 1
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2
votes
1 answer
Discord sending blank text file with BytesIO
I'm trying to send a text file with discord.py, but when I send the file, it seems to be empty.
An example snippet:
bytes = BytesIO()
test = b'sadfasdfsa'
bytes.write(test)
print(bytes)
await ctx.send(file=File(bytes, 'test.txt'))
This results in…
cclloyd
- 8,171
- 16
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- 104
2
votes
1 answer
stream body full when sent from FastAPI, empty when received by requests
I have an api in which the server sends a stream of data to the client. On the server-side, the stream object is populated. I can verify this by writing to a file on the server before sending. But when the client receives the stream and tries to…
SkippyElvis
- 100
- 6
2
votes
0 answers
How to troubleshoot corrupted BytesIO return in django?
I've got a strange issue going on in django, and am not sure how to even start troubleshooting it. I am using xlsxwriter to generate an Excel report from some data. I then want to pass the generated file back to the user. My view code looks…
MarkD
- 4,864
- 5
- 36
- 67
2
votes
1 answer
How to send multiple plots generated by matplotlib to a pptx without any overlapping?
I am working on a project where I am generating hundreds of plots using the matplotlib module in Python. I want to put these plots in a pptx using the python-pptx module, let's say four plots on a slide without storing these plots on the local…
Sud_Hashira
- 29
- 1
- 3
2
votes
1 answer
BytesIO.truncate method does not extend buffer contents
The documentation of IOBase.truncate method says that:
truncate(size=None)
Resize the stream to the given size in bytes (or the current position if size is not specified). The current stream position isn’t changed. This resizing can extend or…
Deedee Megadoodoo
- 843
- 8
- 20
2
votes
1 answer
BytesIO replaces transparency in PNG files with black background
I want to keep transparent background at my 'image' variable.
If I write into a file, image looks fine. I mean image has a transparent background.
with urllib.request.urlopen(request) as response:
imgdata = response.read()
with…
eknbrk
- 187
- 1
- 1
- 16
2
votes
1 answer
Python - load an in-memory ZipFile object as bytes
I have a script which creates a closed in-memory ZipFile object that I need to post as a bytestring (using requests); how do I do that? I have tried opening the file, which fails with "TypeError: expected str, bytes or os.PathLike object, not…
Tim Achee
- 37
- 1
- 3
2
votes
1 answer
pandas does pd.read_table support io.BytesIO and StringIO?
I have a io.BytesIO object, iostream, which is a be2 file read from disk, and I am going to append column headers to the table/iostream,
f = io.BytesIO()
f.write(b'A,B,C,D\n')
f.write(iostream.getvalue())
pd.read_table(f, sep=',', index_col=False,…
daiyue
- 7,196
- 25
- 82
- 149
2
votes
1 answer
"a bytes-like object is required" but I am using bytes
With Python3 I have re-opened stdout in binary mode. After that when I print("Hello") it tells me that I need to use a bytes-like object. Fair enough, it's in binary mode now.
However when I do this:
print(b"Some bytes")
I still get this…
Timmmm
- 88,195
- 71
- 364
- 509
2
votes
1 answer
In an HTML table, how to add text beside plot in jupyter notebook using python?
Any ideas on how to create a 1 X 2 HTML table where cell {0} is a matplotlib plot and cell {1} is a text description for Python 3.X?
import matplotlib.pyplot as plt
from io import BytesIO
%matplotlib inline
def add_split_screen(fig, text,…
Student
- 1,197
- 4
- 22
- 39
2
votes
3 answers
How to use BytesIO with matplotlib and pyqt5?
I made a graph in matplotlib, and wanted to make it in to an image and use it in my pyqt5 application. Someone suggested I use BytesIO for this. This is my code so far:
Drawing my graph:
...
plt.axis('equal')
buff = io.BytesIO()
plt.savefig(buff,…
Taylor Hetherington
- 107
- 9
2
votes
1 answer
Python3.5 error using BytesIO or StringIO with base64.standard_b64encode
I am trying to take the contents of a BytesIO or StringIO object and use base64.standard_b64encode() to encode it. I have tried both. This works fine in python 2.7, however in python 3.5 I get the following error.
TypeError: Can't convert 'bytes'…
Antikythera
- 91
- 1
- 8
2
votes
1 answer
how to attach a BytesIO object to a Webob.Response Object
I'm returning a Webob.Response object from my server to http request. The server puts together a BytesIO object. How can I correctly attach the BytesIO object to the Webob.Response object?
I tried:
app_iter = FileIter(BytesIO_Object)
return…
Abdul Ahmad
- 9,673
- 16
- 64
- 127
2
votes
3 answers
Using pygame to play a MIDI file from stream
What I want to do is the following: Create a MIDI file, but only in memory, and feed it into pygame.mixer.music.load(). Here is what I've been trying (I'm using MidiFile from here):
import pygame.mixer
import MidiFile3
import…
ravenfrost
- 143
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- 1
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