replace bytes with other byte or bytes

[BigOldArt]

Am trying to replace all occurrences of bytes with other byte or bytes.
In the variable myvalue I want to replace badstuff with goodstuff every time it occurs

PyPdf2 returns a value like this from a multi line text box in a fillable PDF.
b"line1\rline2\rline3\rline4"

However, I need to write this without the quotes to a .TXT file
"line1~line2~line3~line4"
or like this if it has to be the same number of bytes
"line1~~line2~~line3~~line4"

the example syntax below gets this message
Syntax Error: invalid syntax: <string>, line 5, pos 5

myanswer =b"line1\rline2\rline3\rline4" print (myanswer) badstuff = b"\r" goodstuff = b"~" if in(myanswer,badstuff): myanswer=re.sub(badstuff,goodstuff,myanswer) print (myanswer)

[snippsat]

Am trying to replace all occurrences of bytes with other byte or bytes.

replace() dos this.

>>> myanswer = b"line1\rline2\rline3\rline4" >>> myanswer.replace(b'\r', b'~') b'line1~line2~line3~line4'

If want it to be string,also default text(Unicode) in Python 3.

>>> myanswer = b"line1\rline2\rline3\rline4" >>> myanswer = myanswer.decode() # Same as decode('utf-8') >>> myanswer 'line1\rline2\rline3\rline4' >>> myanswer.replace('\r', '~') 'line1~line2~line3~line4'