sample_pinpad: fix PEP8 warnings
sample_pinpad: fix PEP8 warnings

sample_pinpad.py:54:45: E502 the backslash is redundant between brackets
sample_pinpad.py:55:25: E127 continuation line over-indented for visual indent
sample_pinpad.py:55:46: E502 the backslash is redundant between brackets
sample_pinpad.py:56:25: E127 continuation line over-indented for visual indent
sample_pinpad.py:62:13: E711 comparison to None should be 'if cond is None:'
sample_pinpad.py:64:17: E711 comparison to None should be 'if cond is None:'
sample_pinpad.py:68:13: E128 continuation line under-indented for visual indent
sample_pinpad.py:69:13: E128 continuation line under-indented for visual indent
sample_pinpad.py:70:13: E128 continuation line under-indented for visual indent
sample_pinpad.py:71:13: E128 continuation line under-indented for visual indent
sample_pinpad.py:72:13: E128 continuation line under-indented for visual indent
sample_pinpad.py:73:13: E128 continuation line under-indented for visual indent
sample_pinpad.py:74:13: E128 continuation line under-indented for visual indent
sample_pinpad.py:75:13: E128 continuation line under-indented for visual indent
sample_pinpad.py:76:13: E128 continuation line under-indented for visual indent
sample_pinpad.py:77:13: E128 continuation line under-indented for visual indent
sample_pinpad.py:78:13: E128 continuation line under-indented for visual indent
sample_pinpad.py:79:13: E128 continuation line under-indented for visual indent
sample_pinpad.py:80:13: E128 continuation line under-indented for visual indent
sample_pinpad.py:115:25: E128 continuation line under-indented for visual indent
sample_pinpad.py:151:1: E402 module level import not at top of file

LudovicRousseau/pyscard,LudovicRousseau/pyscard,LudovicRousseau/pyscard