prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  LZ4_compress and LZ4_uncompress removed
  Since commit python-lz4/python-lz4@d62fdc50c0e183d7260961f09d4e0701fbdf0c5c LZ4_compress and LZ4_decompress have been removed (they've been deprecated for a while). With the version of python-lz4 released on pypi, it means we can't use lz4 compression with dask, and worse importing dask.bytes.compression errors out.
  
  
  </issue>
  <code>
  [start of dask/bytes/compression.py]
  1 from __future__ import print_function, division, absolute_import
  2 
  3 import bz2
  4 import sys
  5 import zlib
  6 
  7 from toolz import identity
  8 
  9 from ..compatibility import gzip_compress, gzip_decompress, GzipFile
  10 from ..utils import ignoring
  11 
  12 
  13 def noop_file(file, **kwargs):
  14     return file
  15 
  16 
  17 compress = {'gzip': gzip_compress,
  18             'zlib': zlib.compress,
  19             'bz2': bz2.compress,
  20             None: identity}
  21 decompress = {'gzip': gzip_decompress,
  22               'zlib': zlib.decompress,
  23               'bz2': bz2.decompress,
  24               None: identity}
  25 files = {'gzip': lambda f, **kwargs: GzipFile(fileobj=f, **kwargs),
  26          None: noop_file}
  27 seekable_files = {None: noop_file}
  28 
  29 
  30 with ignoring(ImportError):
  31     import snappy
  32     compress['snappy'] = snappy.compress
  33     decompress['snappy'] = snappy.decompress
  34 
  35 
  36 with ignoring(ImportError):
  37     import lz4
  38     compress['lz4'] = lz4.LZ4_compress
  39     decompress['lz4'] = lz4.LZ4_uncompress
  40 
  41 with ignoring(ImportError):
  42     from ..compatibility import LZMAFile, lzma_compress, lzma_decompress
  43     compress['xz'] = lzma_compress
  44     decompress['xz'] = lzma_decompress
  45     files['xz'] = LZMAFile
  46 
  47 # Seekable xz files actually tend to scan whole file - see `get_xz_blocks`
  48 # with ignoring(ImportError):
  49 #     import lzma
  50 #     seekable_files['xz'] = lzma.LZMAFile
  51 #
  52 # with ignoring(ImportError):
  53 #     import lzmaffi
  54 #     seekable_files['xz'] = lzmaffi.LZMAFile
  55 
  56 
  57 if sys.version_info[0] >= 3:
  58     import bz2
  59     files['bz2'] = bz2.BZ2File
  60 
  61 
  62 def get_xz_blocks(fp):
  63     from lzmaffi import (STREAM_HEADER_SIZE, decode_stream_footer,
  64                          decode_index, LZMAError)
  65     fp.seek(0, 2)
  66 
  67     def _peek(f, size):
  68         data = f.read(size)
  69         f.seek(-size, 1)
  70         return data
  71 
  72     if fp.tell() < 2 * STREAM_HEADER_SIZE:
  73         raise LZMAError("file too small")
  74 
  75     # read stream paddings (4 bytes each)
  76     fp.seek(-4, 1)
  77     padding = 0
  78     while _peek(fp, 4) == b'\x00\x00\x00\x00':
  79         fp.seek(-4, 1)
  80         padding += 4
  81 
  82     fp.seek(-STREAM_HEADER_SIZE + 4, 1)
  83 
  84     stream_flags = decode_stream_footer(_peek(fp, STREAM_HEADER_SIZE))
  85     fp.seek(-stream_flags.backward_size, 1)
  86 
  87     index = decode_index(_peek(fp, stream_flags.backward_size), padding)
  88     return {'offsets': [b.compressed_file_offset for i, b in index],
  89             'lengths': [b.unpadded_size for i, b in index],
  90             'check': stream_flags.check}
  91 
  92 
  93 def xz_decompress(data, check):
  94     from lzmaffi import decode_block_header_size, LZMADecompressor, FORMAT_BLOCK
  95     hsize = decode_block_header_size(data[:1])
  96     header = data[:hsize]
  97     dc = LZMADecompressor(format=FORMAT_BLOCK, header=header,
  98                           unpadded_size=len(data), check=check)
  99     return dc.decompress(data[len(header):])
  100
  [end of dask/bytes/compression.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/dask/bytes/compression.py b/dask/bytes/compression.py
  --- a/dask/bytes/compression.py
  +++ b/dask/bytes/compression.py
  @@ -33,10 +33,17 @@
       decompress['snappy'] = snappy.decompress
   
   
  -with ignoring(ImportError):
  -    import lz4
  -    compress['lz4'] = lz4.LZ4_compress
  -    decompress['lz4'] = lz4.LZ4_uncompress
  +try:
  +    import lz4.block
  +    compress['lz4'] = lz4.block.compress
  +    compress['lz4'] = lz4.block.decompress
  +except ImportError:
  +    try:
  +        import lz4
  +        compress['lz4'] = lz4.LZ4_compress
  +        compress['lz4'] = lz4.LZ4_uncompress
  +    except ImportError:
  +        pass
   
   with ignoring(ImportError):
       from ..compatibility import LZMAFile, lzma_compress, lzma_decompress
  
verification_info: {"golden_diff": "diff --git a/dask/bytes/compression.py b/dask/bytes/compression.py\n--- a/dask/bytes/compression.py\n+++ b/dask/bytes/compression.py\n@@ -33,10 +33,17 @@\n     decompress['snappy'] = snappy.decompress\n \n \n-with ignoring(ImportError):\n-    import lz4\n-    compress['lz4'] = lz4.LZ4_compress\n-    decompress['lz4'] = lz4.LZ4_uncompress\n+try:\n+    import lz4.block\n+    compress['lz4'] = lz4.block.compress\n+    compress['lz4'] = lz4.block.decompress\n+except ImportError:\n+    try:\n+        import lz4\n+        compress['lz4'] = lz4.LZ4_compress\n+        compress['lz4'] = lz4.LZ4_uncompress\n+    except ImportError:\n+        pass\n \n with ignoring(ImportError):\n     from ..compatibility import LZMAFile, lzma_compress, lzma_decompress\n", "issue": "LZ4_compress and LZ4_uncompress removed\nSince commit python-lz4/python-lz4@d62fdc50c0e183d7260961f09d4e0701fbdf0c5c LZ4_compress and LZ4_decompress have been removed (they've been deprecated for a while). With the version of python-lz4 released on pypi, it means we can't use lz4 compression with dask, and worse importing dask.bytes.compression errors out.\r\n\n", "before_files": [{"content": "from __future__ import print_function, division, absolute_import\n\nimport bz2\nimport sys\nimport zlib\n\nfrom toolz import identity\n\nfrom ..compatibility import gzip_compress, gzip_decompress, GzipFile\nfrom ..utils import ignoring\n\n\ndef noop_file(file, **kwargs):\n    return file\n\n\ncompress = {'gzip': gzip_compress,\n            'zlib': zlib.compress,\n            'bz2': bz2.compress,\n            None: identity}\ndecompress = {'gzip': gzip_decompress,\n              'zlib': zlib.decompress,\n              'bz2': bz2.decompress,\n              None: identity}\nfiles = {'gzip': lambda f, **kwargs: GzipFile(fileobj=f, **kwargs),\n         None: noop_file}\nseekable_files = {None: noop_file}\n\n\nwith ignoring(ImportError):\n    import snappy\n    compress['snappy'] = snappy.compress\n    decompress['snappy'] = snappy.decompress\n\n\nwith ignoring(ImportError):\n    import lz4\n    compress['lz4'] = lz4.LZ4_compress\n    decompress['lz4'] = lz4.LZ4_uncompress\n\nwith ignoring(ImportError):\n    from ..compatibility import LZMAFile, lzma_compress, lzma_decompress\n    compress['xz'] = lzma_compress\n    decompress['xz'] = lzma_decompress\n    files['xz'] = LZMAFile\n\n# Seekable xz files actually tend to scan whole file - see `get_xz_blocks`\n# with ignoring(ImportError):\n#     import lzma\n#     seekable_files['xz'] = lzma.LZMAFile\n#\n# with ignoring(ImportError):\n#     import lzmaffi\n#     seekable_files['xz'] = lzmaffi.LZMAFile\n\n\nif sys.version_info[0] >= 3:\n    import bz2\n    files['bz2'] = bz2.BZ2File\n\n\ndef get_xz_blocks(fp):\n    from lzmaffi import (STREAM_HEADER_SIZE, decode_stream_footer,\n                         decode_index, LZMAError)\n    fp.seek(0, 2)\n\n    def _peek(f, size):\n        data = f.read(size)\n        f.seek(-size, 1)\n        return data\n\n    if fp.tell() < 2 * STREAM_HEADER_SIZE:\n        raise LZMAError(\"file too small\")\n\n    # read stream paddings (4 bytes each)\n    fp.seek(-4, 1)\n    padding = 0\n    while _peek(fp, 4) == b'\\x00\\x00\\x00\\x00':\n        fp.seek(-4, 1)\n        padding += 4\n\n    fp.seek(-STREAM_HEADER_SIZE + 4, 1)\n\n    stream_flags = decode_stream_footer(_peek(fp, STREAM_HEADER_SIZE))\n    fp.seek(-stream_flags.backward_size, 1)\n\n    index = decode_index(_peek(fp, stream_flags.backward_size), padding)\n    return {'offsets': [b.compressed_file_offset for i, b in index],\n            'lengths': [b.unpadded_size for i, b in index],\n            'check': stream_flags.check}\n\n\ndef xz_decompress(data, check):\n    from lzmaffi import decode_block_header_size, LZMADecompressor, FORMAT_BLOCK\n    hsize = decode_block_header_size(data[:1])\n    header = data[:hsize]\n    dc = LZMADecompressor(format=FORMAT_BLOCK, header=header,\n                          unpadded_size=len(data), check=check)\n    return dc.decompress(data[len(header):])\n", "path": "dask/bytes/compression.py"}]}