σ ξ&]\c@`s]dZddlmZmZmZddlZddlZdgZde fd„ƒYZ dS(s Module to read / write Fortran unformatted sequential files. This is in the spirit of code written by Neil Martinsen-Burrell and Joe Zuntz. i(tdivisiontprint_functiontabsolute_importNt FortranFilecB`sneZdZdejd„Zd„Zd„Zd„Zdd„Z dd „Z d „Z d „Z d „Z RS( sέ A file object for unformatted sequential files from Fortran code. Parameters ---------- filename : file or str Open file object or filename. mode : {'r', 'w'}, optional Read-write mode, default is 'r'. header_dtype : dtype, optional Data type of the header. Size and endiness must match the input/output file. Notes ----- These files are broken up into records of unspecified types. The size of each record is given at the start (although the size of this header is not standard) and the data is written onto disk without any formatting. Fortran compilers supporting the BACKSPACE statement will write a second copy of the size to facilitate backwards seeking. This class only supports files written with both sizes for the record. It also does not support the subrecords used in Intel and gfortran compilers for records which are greater than 2GB with a 4-byte header. An example of an unformatted sequential file in Fortran would be written as:: OPEN(1, FILE=myfilename, FORM='unformatted') WRITE(1) myvariable Since this is a non-standard file format, whose contents depend on the compiler and the endianness of the machine, caution is advised. Files from gfortran 4.8.0 and gfortran 4.1.2 on x86_64 are known to work. Consider using Fortran direct-access files or files from the newer Stream I/O, which can be easily read by `numpy.fromfile`. Examples -------- To create an unformatted sequential Fortran file: >>> from scipy.io import FortranFile >>> f = FortranFile('test.unf', 'w') >>> f.write_record(np.array([1,2,3,4,5], dtype=np.int32)) >>> f.write_record(np.linspace(0,1,20).reshape((5,4)).T) >>> f.close() To read this file: >>> f = FortranFile('test.unf', 'r') >>> print(f.read_ints(np.int32)) [1 2 3 4 5] >>> print(f.read_reals(float).reshape((5,4), order="F")) [[0. 0.05263158 0.10526316 0.15789474] [0.21052632 0.26315789 0.31578947 0.36842105] [0.42105263 0.47368421 0.52631579 0.57894737] [0.63157895 0.68421053 0.73684211 0.78947368] [0.84210526 0.89473684 0.94736842 1. ]] >>> f.close() Or, in Fortran:: integer :: a(5), i double precision :: b(5,4) open(1, file='test.unf', form='unformatted') read(1) a read(1) b close(1) write(*,*) a do i = 1, 5 write(*,*) b(i,:) end do trcC`s΄|dkrtdƒ‚ntj|ƒ}|jdkrItjdƒn|dksgt|ƒdkrvtdƒ‚nt|dƒr‘||_ nt |d|ƒ|_ ||_ dS( NsMust specify dtypetus$Given a dtype which is not unsigned.trwismode must be either r or wtseeks%sb( tNonet ValueErrortnptdtypetkindtwarningstwarntlenthasattrt_fptopent _header_dtype(tselftfilenametmodet header_dtype((s0lib/python2.7/site-packages/scipy/io/_fortran.pyt__init__Zs  cC`s%ttj|jd|jddƒƒS(NR tcounti(tintR tfromfileRR(R((s0lib/python2.7/site-packages/scipy/io/_fortran.pyt _read_sizelscG`sŒtd„|Dƒƒ}td„|Dƒƒ}tj|gd|jƒ}|j|jƒx|D]}|j|jƒq^W|j|jƒdS(s Write a record (including sizes) to the file. Parameters ---------- *items : array_like The data arrays to write. Notes ----- Writes data items to a file:: write_record(a.T, b.T, c.T, ...) write(1) a, b, c, ... Note that data in multidimensional arrays is written in row-major order --- to make them read correctly by Fortran programs, you need to transpose the arrays yourself when writing them. cs`s|]}tj|ƒVqdS(N(R tasarray(t.0titem((s0lib/python2.7/site-packages/scipy/io/_fortran.pys †scs`s|]}|jVqdS(N(tnbytes(RR((s0lib/python2.7/site-packages/scipy/io/_fortran.pys ‡sR N(ttupletsumR tarrayRttofileR(Rtitemst total_sizetnbR((s0lib/python2.7/site-packages/scipy/io/_fortran.pyt write_recordos c O`sς|jdd ƒ}|r<tdjt|jƒƒƒƒ‚n|d k rX||f}n|smtdƒ‚n|jƒ}td„|Dƒƒ}td„|Dƒƒ}t||ƒ\}}|dkrαtdj||ƒƒ‚nt |ƒdkr||krtd j||ƒƒ‚ng}x€|D]x}t j |j d|d |ƒ} |j d kr’|dkr’| j d|j ks‚t‚| d} q’n|j| ƒq'W|jƒ} || krΚtd ƒ‚nt |ƒdkrδ|dSt|ƒSd S(s? Reads a record of a given type from the file. Parameters ---------- *dtypes : dtypes, optional Data type(s) specifying the size and endiness of the data. Returns ------- data : ndarray A one-dimensional array object. Notes ----- If the record contains a multi-dimensional array, you can specify the size in the dtype. For example:: INTEGER var(5,4) can be read with:: read_record('(4,5)i4').T Note that this function does **not** assume the file data is in Fortran column major order, so you need to (i) swap the order of dimensions when reading and (ii) transpose the resulting array. Alternatively, you can read the data as a 1D array and handle the ordering yourself. For example:: read_record('i4').reshape(5, 4, order='F') For records that contain several variables or mixed types (as opposed to single scalar or array types), give them as separate arguments:: double precision :: a integer :: b write(1) a, b record = f.read_record('έscs`s|]}|jVqdS(N(titemsize(RR ((s0lib/python2.7/site-packages/scipy/io/_fortran.pys ήsis@Size obtained ({0}) is not a multiple of the dtypes given ({1}).isTSize obtained ({0}) does not match with the expected size ({1}) of multi-item recordRsPSizes do not agree in the header and footer for this record - check header dtypeN((i(tpopRR tformatR!tkeysRR"tdivmodRR RRtshapetAssertionErrortappendtIOError( RtdtypestkwargsR t first_sizet block_sizet num_blockst remaindertdataRt second_size((s0lib/python2.7/site-packages/scipy/io/_fortran.pyt read_records>B$         ti4cC`s |j|ƒS(s» Reads a record of a given type from the file, defaulting to an integer type (``INTEGER*4`` in Fortran). Parameters ---------- dtype : dtype, optional Data type specifying the size and endiness of the data. Returns ------- data : ndarray A one-dimensional array object. See Also -------- read_reals read_record (R:(RR ((s0lib/python2.7/site-packages/scipy/io/_fortran.pyt read_intsstf8cC`s |j|ƒS(sΏ Reads a record of a given type from the file, defaulting to a floating point number (``real*8`` in Fortran). Parameters ---------- dtype : dtype, optional Data type specifying the size and endiness of the data. Returns ------- data : ndarray A one-dimensional array object. See Also -------- read_ints read_record (R:(RR ((s0lib/python2.7/site-packages/scipy/io/_fortran.pyt read_realsscC`s|jjƒdS(sν Closes the file. It is unsupported to call any other methods off this object after closing it. Note that this class supports the 'with' statement in modern versions of Python, to call this automatically N(Rtclose(R((s0lib/python2.7/site-packages/scipy/io/_fortran.pyR?0scC`s|S(N((R((s0lib/python2.7/site-packages/scipy/io/_fortran.pyt __enter__9scC`s|jƒdS(N(R?(Rttypetvaluettb((s0lib/python2.7/site-packages/scipy/io/_fortran.pyt__exit__<s(t__name__t __module__t__doc__R tuint32RRR(R:R<R>R?R@RD(((s0lib/python2.7/site-packages/scipy/io/_fortran.pyRsJ  ! r   ( RGt __future__RRRR tnumpyR t__all__tobjectR(((s0lib/python2.7/site-packages/scipy/io/_fortran.pyts