问题
When you run something through popen in Python, the results come in from the buffer with the CR-LF decimal value of a carriage return (13) at the end of each line. How do you remove this from a Python string?
回答1:
You can simply do
s = s.replace('\r\n', '\n')
to replace all occurrences of CRNL with just NL, which seems to be what you want.
回答2:
buffer = "<text from your subprocess here>\r\n"
no_cr = buffer.replace("\r\n", "\n")
回答3:
If they are at the end of the string(s), I would suggest to use:
buffer = "<text from your subprocess here>\r\n"
no_cr = buffer.rstrip("\r\n")
You can also use rstrip() without parameters which will remove whitespace as well.
回答4:
Actually, you can simply do the following:
s = s.strip()
This will remove any extraneous whitespace, including CR and LFs, leading or trailing the string.
s = s.rstrip()
Does the same, but only trailing the string.
That is:
s = ' Now is the time for all good... \t\n\r "
s = s.strip()
s now contains 'Now is the time for all good...'
s = s.rstrip()
s now contains ' Now is the time for all good...'
See http://docs.python.org/library/stdtypes.html for more.
回答5:
You can do s = s.replace('\r', '') too.
回答6:
replace('\r\n','\n') should work, but sometimes it just does not. How strange. Instead you can use this:
lines = buffer.split('\r')
cleanbuffer = ''
for line in lines: cleanbuffer = cleanbuffer + line
来源：https://stackoverflow.com/questions/1759619/remove-13-from-python-string