wL iuFdZddlZddlZddlmZddlmZGddeZy)zGit LFS related utilitiesN)AbstractContextManager)BinaryIOc|eZdZdZdededefdZdZdZddefd Z d efd Z e jfd ed ed efdZ dZy) SliceFileObja Utility context manager to read a *slice* of a seekable file-like object as a seekable, file-like object. This is NOT thread safe Inspired by stackoverflow.com/a/29838711/593036 Credits to @julien-c Args: fileobj (`BinaryIO`): A file-like object to slice. MUST implement `tell()` and `seek()` (and `read()` of course). `fileobj` will be reset to its original position when exiting the context manager. seek_from (`int`): The start of the slice (offset from position 0 in bytes). read_limit (`int`): The maximum number of bytes to read from the slice. Attributes: previous_position (`int`): The previous position Examples: Reading 200 bytes with an offset of 128 bytes from a file (ie bytes 128 to 327): ```python >>> with open("path/to/file", "rb") as file: ... with SliceFileObj(file, seek_from=128, read_limit=200) as fslice: ... fslice.read(...) ``` Reading a file in chunks of 512 bytes ```python >>> import os >>> chunk_size = 512 >>> file_size = os.getsize("path/to/file") >>> with open("path/to/file", "rb") as file: ... for chunk_idx in range(ceil(file_size / chunk_size)): ... with SliceFileObj(file, seek_from=chunk_idx * chunk_size, read_limit=chunk_size) as fslice: ... chunk = fslice.read(...) ``` fileobj seek_from read_limitc.||_||_||_yN)rrr )selfrrr s `/mnt/ssd/data/python-lab/Trading/venv/lib/python3.12/site-packages/huggingface_hub/utils/_lfs.py__init__zSliceFileObj.__init__Ds "$cP|jj|_|jjdtj }t |j||jz |_ |jj|jtj|S)Nr) rtell_previous_positionseekosSEEK_ENDminr r_lenioSEEK_SET)r end_of_streams r __enter__zSliceFileObj.__enter__Ism"&,,"3"3"5 ))!R[[9 )GH  $.."++6 rcl|jj|jtjyr )rrrrr)r exc_type exc_value tracebacks r __exit__zSliceFileObj.__exit__Qs  $112;;?rnc|j}||jk\ry|j|z }|jj|dkr|}|St ||}|S)Nrr)rrrreadr)r r!posremaining_amountdatas r r#zSliceFileObj.readTsciik $)) 99s?||  QU!1Y ADAGW@XY rreturncP|jj|jz Sr )rrrr s r rzSliceFileObj.tell\s||  "T^^33roffsetwhencec|j}||jz}|tjtjfvrD|tjk(r||zn||z}t |t ||}tj}nY|tjk(r7|jj}t ||z t |||z }ntd|d|jj|||jz S)Nz whence value z is not supported) rrrrrmaxrSEEK_CURrr ValueErrorr)r r*r+startendcur_poss r rzSliceFileObj.seek_sdii bkk2;;/ /'-'>AArc#4K|jdyw)Ni@)r!)r#r)s r __iter__zSliceFileObj.__iter__msii/i**sN))__name__ __module__ __qualname____doc__rintrrr r#rrrrr4rr rrsq*X%%S%c% @c4c4/1kk B3 B Bc B+rr)r9rr contextlibrtypingrrr;rr r>s% -W+)W+r