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72 lines
2.0 KiB
72 lines
2.0 KiB
5 years ago
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#-------------------------------------------------------------------------------
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# elftools: common/py3compat.py
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#
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# Python 2/3 compatibility code
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#
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# Eli Bendersky (eliben@gmail.com)
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# This code is in the public domain
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#-------------------------------------------------------------------------------
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import sys
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PY3 = sys.version_info[0] == 3
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if PY3:
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import io
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StringIO = io.StringIO
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BytesIO = io.BytesIO
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# Functions for acting on bytestrings and strings. In Python 2 and 3,
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# strings and bytes are the same and chr/ord can be used to convert between
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# numeric byte values and their string pepresentations. In Python 3, bytes
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# and strings are different types and bytes hold numeric values when
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# iterated over.
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def bytes2str(b): return b.decode('latin-1')
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def str2bytes(s): return s.encode('latin-1')
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def int2byte(i): return bytes((i,))
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def byte2int(b): return b
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def iterbytes(b):
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"""Return an iterator over the elements of a bytes object.
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For example, for b'abc' yields b'a', b'b' and then b'c'.
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"""
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for i in range(len(b)):
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yield b[i:i+1]
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ifilter = filter
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maxint = sys.maxsize
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else:
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import cStringIO
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StringIO = BytesIO = cStringIO.StringIO
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def bytes2str(b): return b
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def str2bytes(s): return s
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int2byte = chr
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byte2int = ord
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def iterbytes(b):
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return iter(b)
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from itertools import ifilter
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maxint = sys.maxint
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def iterkeys(d):
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"""Return an iterator over the keys of a dictionary."""
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return getattr(d, 'keys' if PY3 else 'iterkeys')()
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def itervalues(d):
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"""Return an iterator over the values of a dictionary."""
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return getattr(d, 'values' if PY3 else 'itervalues')()
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def iteritems(d):
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"""Return an iterator over the items of a dictionary."""
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return getattr(d, 'items' if PY3 else 'iteritems')()
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try:
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from collections.abc import Mapping # python >= 3.3
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except ImportError:
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from collections import Mapping # python < 3.3
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