CODEWITHSUNDEEP
pythonpython-3.x
user1564622
user1564622

Reputation: 63

cannot convert 'bytes' object to str implicitly

I am trying to open a gif file, and send its bytes properly to a webbrowser but it throws the exception 'cannot convert 'bytes' object to str implicitly' and frankly I am baffled, because I already converted it to a string.

files=open("WebContent/"+fileName,"rb")
#size=os.path.getsize("WebContent/"+fileName)
text=str(files.read())
text=text.encode('UTF-8')
defaultResponseCode="HTTP/1.1 200 OK\r\nContent-Type: image/gif\r\nContent-Transfer-Encoding: binary\r\nContent-Length: 29696\r\n\r\n"+text

Thanks in advance!

Upvotes: 5

Views: 16976

Answers (3)

Nitish K.
Nitish K.

Reputation: 1

In python 3+ I was getting similar problem, and I removed text.encode("utf-8") and used text.strip().

text = text.strip()

Upvotes: 0

philwalk
philwalk

Reputation: 674

For those primarily interested in Popen rather than psql, here's a debugged working python3 script, based the original Popen question, and incorporating provided suggestions.

#!/usr/bin/env python3

# print a list of postgresql databases via psql
import subprocess

username = "postgres"
dbname = "postgres"

p = subprocess.Popen(
  args = ['psql', '-qAt', '-U', username, '-d', dbname],
# args = ['psql', '-qAt', '-d', dbname], # with adequate user permissions
  stdin = subprocess.PIPE,
  stdout = subprocess.PIPE
)
sql = b"SELECT datname FROM pg_database;"

dbs = p.communicate(b"SELECT datname FROM pg_database;")[0].split(b'\n')

for db in dbs:
  print("%s" % db.decode("utf-8"))

p.wait()

Upvotes: 0

ndpu
ndpu

Reputation: 22561

Here you are trying to convert bytes (file opened with 'rb' mode) to string:

text = str(files.read())

change above line to this:

text = files.read().decode(encoding='change_to_source_file_encoding')

then you can convert unicode string to utf-8 byte string with:

text = text.encode('UTF-8')

And if source encoding is utf-8 you can just pass byte string from files.read() to your result string without senseless decode/encode steps (from utf-8 bytes to string and again to utf-8 bytes)...

update: try with requests

url = 'url'
files = {'file': open("WebContent/"+fileName, 'rb')}
response = requests.post(url, files=files)

update 2:

According to content-type in response header (... Content-Type: image/gif ...) you have data with needed format just after files.read() whithout any encoding/decoding!

Upvotes: 1

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