Can't concat bytes to str












18















This is proving to be a rough transition over to python. What is going on here?:



f = open( 'myfile', 'a+' )
f.write('test string' + 'n')

key = "pass:hello"
plaintext = subprocess.check_output(['openssl', 'aes-128-cbc', '-d', '-in', test, '-base64', '-pass', key])
print (plaintext)

f.write (plaintext + 'n')
f.close()


The output file looks like:



test string



and then I get this error:



b'decryption successfuln'
Traceback (most recent call last):
File ".../Project.py", line 36, in <module>
f.write (plaintext + 'n')
TypeError: can't concat bytes to str









share|improve this question


















  • 1





    Decode your plaintext or encode the newline.

    – Hyperboreus
    Feb 20 '14 at 18:53


















18















This is proving to be a rough transition over to python. What is going on here?:



f = open( 'myfile', 'a+' )
f.write('test string' + 'n')

key = "pass:hello"
plaintext = subprocess.check_output(['openssl', 'aes-128-cbc', '-d', '-in', test, '-base64', '-pass', key])
print (plaintext)

f.write (plaintext + 'n')
f.close()


The output file looks like:



test string



and then I get this error:



b'decryption successfuln'
Traceback (most recent call last):
File ".../Project.py", line 36, in <module>
f.write (plaintext + 'n')
TypeError: can't concat bytes to str









share|improve this question


















  • 1





    Decode your plaintext or encode the newline.

    – Hyperboreus
    Feb 20 '14 at 18:53
















18












18








18


5






This is proving to be a rough transition over to python. What is going on here?:



f = open( 'myfile', 'a+' )
f.write('test string' + 'n')

key = "pass:hello"
plaintext = subprocess.check_output(['openssl', 'aes-128-cbc', '-d', '-in', test, '-base64', '-pass', key])
print (plaintext)

f.write (plaintext + 'n')
f.close()


The output file looks like:



test string



and then I get this error:



b'decryption successfuln'
Traceback (most recent call last):
File ".../Project.py", line 36, in <module>
f.write (plaintext + 'n')
TypeError: can't concat bytes to str









share|improve this question














This is proving to be a rough transition over to python. What is going on here?:



f = open( 'myfile', 'a+' )
f.write('test string' + 'n')

key = "pass:hello"
plaintext = subprocess.check_output(['openssl', 'aes-128-cbc', '-d', '-in', test, '-base64', '-pass', key])
print (plaintext)

f.write (plaintext + 'n')
f.close()


The output file looks like:



test string



and then I get this error:



b'decryption successfuln'
Traceback (most recent call last):
File ".../Project.py", line 36, in <module>
f.write (plaintext + 'n')
TypeError: can't concat bytes to str






python






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Feb 20 '14 at 18:50









AlexAlex

7,37826101181




7,37826101181








  • 1





    Decode your plaintext or encode the newline.

    – Hyperboreus
    Feb 20 '14 at 18:53
















  • 1





    Decode your plaintext or encode the newline.

    – Hyperboreus
    Feb 20 '14 at 18:53










1




1





Decode your plaintext or encode the newline.

– Hyperboreus
Feb 20 '14 at 18:53







Decode your plaintext or encode the newline.

– Hyperboreus
Feb 20 '14 at 18:53














2 Answers
2






active

oldest

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19














subprocess.check_output() returns a bytestring.



In Python 3, there's no implicit conversion between unicode (str) objects and bytes objects. If you know the encoding of the output, you can .decode() it to get a string, or you can turn the n you want to add to bytes with "n".encode('ascii')






share|improve this answer































    8














    subprocess.check_output() returns bytes.



    so you need to convert 'n' to bytes as well:



     f.write (plaintext + b'n')


    hope this helps






    share|improve this answer























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      2 Answers
      2






      active

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      2 Answers
      2






      active

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      oldest

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      active

      oldest

      votes









      19














      subprocess.check_output() returns a bytestring.



      In Python 3, there's no implicit conversion between unicode (str) objects and bytes objects. If you know the encoding of the output, you can .decode() it to get a string, or you can turn the n you want to add to bytes with "n".encode('ascii')






      share|improve this answer




























        19














        subprocess.check_output() returns a bytestring.



        In Python 3, there's no implicit conversion between unicode (str) objects and bytes objects. If you know the encoding of the output, you can .decode() it to get a string, or you can turn the n you want to add to bytes with "n".encode('ascii')






        share|improve this answer


























          19












          19








          19







          subprocess.check_output() returns a bytestring.



          In Python 3, there's no implicit conversion between unicode (str) objects and bytes objects. If you know the encoding of the output, you can .decode() it to get a string, or you can turn the n you want to add to bytes with "n".encode('ascii')






          share|improve this answer













          subprocess.check_output() returns a bytestring.



          In Python 3, there's no implicit conversion between unicode (str) objects and bytes objects. If you know the encoding of the output, you can .decode() it to get a string, or you can turn the n you want to add to bytes with "n".encode('ascii')







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Feb 20 '14 at 18:54









          WoobleWooble

          66.7k1184113




          66.7k1184113

























              8














              subprocess.check_output() returns bytes.



              so you need to convert 'n' to bytes as well:



               f.write (plaintext + b'n')


              hope this helps






              share|improve this answer




























                8














                subprocess.check_output() returns bytes.



                so you need to convert 'n' to bytes as well:



                 f.write (plaintext + b'n')


                hope this helps






                share|improve this answer


























                  8












                  8








                  8







                  subprocess.check_output() returns bytes.



                  so you need to convert 'n' to bytes as well:



                   f.write (plaintext + b'n')


                  hope this helps






                  share|improve this answer













                  subprocess.check_output() returns bytes.



                  so you need to convert 'n' to bytes as well:



                   f.write (plaintext + b'n')


                  hope this helps







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Oct 24 '17 at 21:32









                  HISIHISI

                  1,55011123




                  1,55011123






























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