Diff for "PythonCourse/PythonLES/F2Py"

Differences between revisions 1 and 13 (spanning 12 versions)

F2PY

Contents

"Hello world"
Compare pure Python and Python+Fortran

A tool that provides connection between Python and Fortran languages Official website

Type:

f2py # to see the usage options
f2py -c --help-fcompiler # to see what local fortran compilers does f2py recognize

f2py wraps Fortran code and allows to use it as a Python module.

"Hello world"

C File hello_world.f
      subroutine foo (a)
      integer a
      print*, "Hello from Fortran!"
      print*, "a=",a
      end

Compile:

f2py -c -m hello hello.f --fcompiler=gfortran

Try it in Python:

import hello
print hello.__doc__
hello.foo(4)

Compare pure Python and Python+Fortran

file (watermask, 10x10 degrees, 250m resolution): /home/zmaw/m300036/PythonSeminar/watermask/MOD44W.A2000055.h18v04.005.2009212173853.hdf

Real world example: moving window averaging

Fortran code: code
Python code: code
Fortran+Python: code

LehreWiki: PythonCourse/PythonLES/F2Py (last edited 2012-12-06 09:23:18 by MikhailItkin)

-  ⇤ ← Revision 1 as of 2012-12-05 18:28:46 → 
  Size: 359
  Editor: MikhailItkin
  Comment:
+   ← Revision 13 as of 2012-12-06 09:23:00 → ⇥
  Size: 1154
  Editor: MikhailItkin
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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-= F2PY ==
+F2PY
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-A tool that provides connection between Python and Fortran languages
[[http://www.scipy.org/F2py |Official website]]
+<<TableOfContents(4)>>

A tool that provides connection between Python and Fortran languages [[http://www.scipy.org/F2py|Official website]]
-Line 8:
+Line 9:
-Enter {{{f2py}}} to see the usage options
Enter {{{f2py -c --help-fcompiler}}} to see what fortran compilers does f2py recognize
+{{{
Type:

f2py # to see the usage options
f2py -c --help-fcompiler # to see what local fortran compilers does f2py recognize
}}}
f2py wraps Fortran code and allows to use it as a Python module.

== "Hello world" ==
{{{
C File hello_world.f
      subroutine foo (a)
      integer a
      print*, "Hello from Fortran!"
      print*, "a=",a
      end
}}}
Compile:

{{{
f2py -c -m hello hello.f --fcompiler=gfortran
}}}
Try it in Python:

{{{
import hello
print hello.__doc__
hello.foo(4)
}}}

== Compare pure Python and Python+Fortran ==

file (watermask, 10x10 degrees, 250m resolution):  /home/zmaw/m300036/PythonSeminar/watermask/MOD44W.A2000055.h18v04.005.2009212173853.hdf


Real world example: moving window averaging

 * Fortran code: [[ /ArStats | code ]]
 * Python code: [[/ResizeWaterMaskPython | code]]
 * Fortran+Python: [[ /ResizeWaterMaskFortran | code]]