Fix TypeError preventing script to launch

[melvinmajor]

Hi, I followed a fix for the error encountered when launching this script. Everything is based on https://docs.python.org/3/library/subprocess.html#subprocess.Popen.communicate and while checking to fix: TypeError: argument should be integer or bytes-like object, not 'str'

[coveralls]

Pull Request Test Coverage Report for Build 33

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 86.275%

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Totals
Change from base Build 31:	0.0%
Covered Lines:	396
Relevant Lines:	459

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💛 - Coveralls

[Gadgetoid]

Good catch!

However using b'=' instead of ord('=') would also be more Pythonic and would work, I believe, in Python 2.x and 3.x.

Python 3.6:

>>> b"hello world".index("l")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: a bytes-like object is required, not 'str'

>>> b"hello world".index(b"l")
2

And 2.7:

>>> b"hello world".index("l")
2
>>> b"hello world".index(b"l")
2