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Description:

cythonfortranfile 0.2.7

Cython fortran-file

This package is a fast and easy reader for record-based binary format, as written by Fortran.
Installation
This packages requires a compiler to be installed on you system. If you're using Linux or MacOSX you should be fine. If you're using Windows, please get in touch with me or open an issue.
pip install cython_fortran_file

That's all!
Using it
Here is a simple demonstration:
from cython_fortran_file import FortranFile as FF

f = FF("/path/to/my/fortran/file.dat", mode="r")

# Skip 5 records
f.skip(5)

# Read one record (an array of `double`)
data = f.read_vector("d")
assert data.dtype == np.float64

# Read one record (an array of signed `int`)
data = f.read_vector("i")
assert data.dtype == np.int32

# Read one *single* int. This will fail if there is more to read!
v = f.read_int()

# f _looks_ like a regular file descriptor
f.tell()
f.seek(0)
f.close()

It also supports with statement so that you can't forget to close the file handler
with FF("/path/to/my/fortran/file.dat") as f:
f.skip(5)

data = f.read_vector("d") # Read a vector of doubles (as usual)

Data types
The argument of read_vector follows the convention of the python struct package (C convention). See https://docs.python.org/3.5/library/struct.html#format-characters for the full list. Here is a shorter version:

Argument
Fortran type
C type
Numpy dtype

d
real(8)
double
np.float64

f
real(4)
float
np.float32

i
integer
int
np.int32

l
integer(8)
long
np.int64