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"""
This module converts code written for numarray to run with numpy
Makes the following changes:
* Changes import statements
import numarray.package
--> import numpy.numarray.package as numarray_package
with all numarray.package in code changed to numarray_package
import numarray --> import numpy.numarray as numarray
import numarray.package as <yyy> --> import numpy.numarray.package as <yyy>
from numarray import <xxx> --> from numpy.numarray import <xxx>
from numarray.package import <xxx>
--> from numpy.numarray.package import <xxx>
package can be convolve, image, nd_image, mlab, linear_algebra, ma,
matrix, fft, random_array
* Makes search and replace changes to:
- .imaginary --> .imag
- .flat --> .ravel() (most of the time)
- .byteswapped() --> .byteswap(False)
- .byteswap() --> .byteswap(True)
- .info() --> numarray.info(self)
- .isaligned() --> .flags.aligned
- .isbyteswapped() --> (not .dtype.isnative)
- .typecode() --> .dtype.char
- .iscontiguous() --> .flags.contiguous
- .is_c_array() --> .flags.carray and .dtype.isnative
- .is_fortran_contiguous() --> .flags.fortran
- .is_f_array() --> .dtype.isnative and .flags.farray
- .itemsize() --> .itemsize
- .nelements() --> .size
- self.new(type) --> numarray.newobj(self, type)
- .repeat(r) --> .repeat(r, axis=0)
- .size() --> .size
- self.type() -- numarray.typefrom(self)
- .typecode() --> .dtype.char
- .stddev() --> .std()
- .togglebyteorder() --> numarray.togglebyteorder(self)
- .getshape() --> .shape
- .setshape(obj) --> .shape=obj
- .getflat() --> .ravel()
- .getreal() --> .real
- .setreal() --> .real =
- .getimag() --> .imag
- .setimag() --> .imag =
- .getimaginary() --> .imag
- .setimaginary() --> .imag
"""
__all__ = ['convertfile', 'convertall', 'converttree', 'convertsrc']
import sys
import os
import re
import glob
def changeimports(fstr, name, newname):
importstr = 'import %s' % name
importasstr = 'import %s as ' % name
fromstr = 'from %s import ' % name
fromall=0
name_ = name
if ('.' in name):
name_ = name.replace('.','_')
fstr = re.sub(r'(import\s+[^,\n\r]+,\s*)(%s)' % name,
"\\1%s as %s" % (newname, name), fstr)
fstr = fstr.replace(importasstr, 'import %s as ' % newname)
fstr = fstr.replace(importstr, 'import %s as %s' % (newname,name_))
if (name_ != name):
fstr = fstr.replace(name, name_)
ind = 0
Nlen = len(fromstr)
Nlen2 = len("from %s import " % newname)
while 1:
found = fstr.find(fromstr,ind)
if (found < 0):
break
ind = found + Nlen
if fstr[ind] == '*':
continue
fstr = "%sfrom %s import %s" % (fstr[:found], newname, fstr[ind:])
ind += Nlen2 - Nlen
return fstr, fromall
flatindex_re = re.compile('([.]flat(\s*?[[=]))')
def addimport(astr):
# find the first line with import on it
ind = astr.find('import')
start = astr.rfind(os.linesep, 0, ind)
astr = "%s%s%s%s" % (astr[:start], os.linesep,
"import numpy.numarray as numarray",
astr[start:])
return astr
def replaceattr(astr):
astr = astr.replace(".imaginary", ".imag")
astr = astr.replace(".byteswapped()",".byteswap(False)")
astr = astr.replace(".byteswap()", ".byteswap(True)")
astr = astr.replace(".isaligned()", ".flags.aligned")
astr = astr.replace(".iscontiguous()",".flags.contiguous")
astr = astr.replace(".is_fortran_contiguous()",".flags.fortran")
astr = astr.replace(".itemsize()",".itemsize")
astr = astr.replace(".size()",".size")
astr = astr.replace(".nelements()",".size")
astr = astr.replace(".typecode()",".dtype.char")
astr = astr.replace(".stddev()",".std()")
astr = astr.replace(".getshape()", ".shape")
astr = astr.replace(".getflat()", ".ravel()")
astr = astr.replace(".getreal", ".real")
astr = astr.replace(".getimag", ".imag")
astr = astr.replace(".getimaginary", ".imag")
# preserve uses of flat that should be o.k.
tmpstr = flatindex_re.sub(r"@@@@\2",astr)
# replace other uses of flat
tmpstr = tmpstr.replace(".flat",".ravel()")
# put back .flat where it was valid
astr = tmpstr.replace("@@@@", ".flat")
return astr
info_re = re.compile(r'(\S+)\s*[.]\s*info\s*[(]\s*[)]')
new_re = re.compile(r'(\S+)\s*[.]\s*new\s*[(]\s*(\S+)\s*[)]')
toggle_re = re.compile(r'(\S+)\s*[.]\s*togglebyteorder\s*[(]\s*[)]')
type_re = re.compile(r'(\S+)\s*[.]\s*type\s*[(]\s*[)]')
isbyte_re = re.compile(r'(\S+)\s*[.]\s*isbyteswapped\s*[(]\s*[)]')
iscarr_re = re.compile(r'(\S+)\s*[.]\s*is_c_array\s*[(]\s*[)]')
isfarr_re = re.compile(r'(\S+)\s*[.]\s*is_f_array\s*[(]\s*[)]')
repeat_re = re.compile(r'(\S+)\s*[.]\s*repeat\s*[(]\s*(\S+)\s*[)]')
setshape_re = re.compile(r'(\S+)\s*[.]\s*setshape\s*[(]\s*(\S+)\s*[)]')
setreal_re = re.compile(r'(\S+)\s*[.]\s*setreal\s*[(]\s*(\S+)\s*[)]')
setimag_re = re.compile(r'(\S+)\s*[.]\s*setimag\s*[(]\s*(\S+)\s*[)]')
setimaginary_re = re.compile(r'(\S+)\s*[.]\s*setimaginary\s*[(]\s*(\S+)\s*[)]')
def replaceother(astr):
# self.info() --> numarray.info(self)
# self.new(type) --> numarray.newobj(self, type)
# self.togglebyteorder() --> numarray.togglebyteorder(self)
# self.type() --> numarray.typefrom(self)
(astr, n1) = info_re.subn('numarray.info(\\1)', astr)
(astr, n2) = new_re.subn('numarray.newobj(\\1, \\2)', astr)
(astr, n3) = toggle_re.subn('numarray.togglebyteorder(\\1)', astr)
(astr, n4) = type_re.subn('numarray.typefrom(\\1)', astr)
if (n1+n2+n3+n4 > 0):
astr = addimport(astr)
astr = isbyte_re.sub('not \\1.dtype.isnative', astr)
astr = iscarr_re.sub('\\1.dtype.isnative and \\1.flags.carray', astr)
astr = isfarr_re.sub('\\1.dtype.isnative and \\1.flags.farray', astr)
astr = repeat_re.sub('\\1.repeat(\\2, axis=0)', astr)
astr = setshape_re.sub('\\1.shape = \\2', astr)
astr = setreal_re.sub('\\1.real = \\2', astr)
astr = setimag_re.sub('\\1.imag = \\2', astr)
astr = setimaginary_re.sub('\\1.imag = \\2', astr)
return astr
import datetime
def fromstr(filestr):
savestr = filestr[:]
filestr, fromall = changeimports(filestr, 'numarray', 'numpy.numarray')
base = 'numarray'
newbase = 'numpy.numarray'
for sub in ['', 'convolve', 'image', 'nd_image', 'mlab', 'linear_algebra',
'ma', 'matrix', 'fft', 'random_array']:
if sub != '':
sub = '.'+sub
filestr, fromall = changeimports(filestr, base+sub, newbase+sub)
filestr = replaceattr(filestr)
filestr = replaceother(filestr)
if savestr != filestr:
name = os.path.split(sys.argv[0])[-1]
today = datetime.date.today().strftime('%b %d, %Y')
filestr = '## Automatically adapted for '\
'numpy.numarray %s by %s\n\n%s' % (today, name, filestr)
return filestr, 1
return filestr, 0
def makenewfile(name, filestr):
fid = file(name, 'w')
fid.write(filestr)
fid.close()
def convertfile(filename, orig=1):
"""Convert the filename given from using Numarray to using NumPy
Copies the file to filename.orig and then over-writes the file
with the updated code
"""
fid = open(filename)
filestr = fid.read()
fid.close()
filestr, changed = fromstr(filestr)
if changed:
if orig:
base, ext = os.path.splitext(filename)
os.rename(filename, base+".orig")
else:
os.remove(filename)
makenewfile(filename, filestr)
def fromargs(args):
filename = args[1]
convertfile(filename)
def convertall(direc=os.path.curdir, orig=1):
"""Convert all .py files to use numpy.oldnumeric (from Numeric) in the directory given
For each file, a backup of <usesnumeric>.py is made as
<usesnumeric>.py.orig. A new file named <usesnumeric>.py
is then written with the updated code.
"""
files = glob.glob(os.path.join(direc,'*.py'))
for afile in files:
if afile[-8:] == 'setup.py': continue
convertfile(afile, orig)
header_re = re.compile(r'(numarray/libnumarray.h)')
def convertsrc(direc=os.path.curdir, ext=None, orig=1):
"""Replace Numeric/arrayobject.h with numpy/oldnumeric.h in all files in the
directory with extension give by list ext (if ext is None, then all files are
replaced)."""
if ext is None:
files = glob.glob(os.path.join(direc,'*'))
else:
files = []
for aext in ext:
files.extend(glob.glob(os.path.join(direc,"*.%s" % aext)))
for afile in files:
fid = open(afile)
fstr = fid.read()
fid.close()
fstr, n = header_re.subn(r'numpy/libnumarray.h',fstr)
if n > 0:
if orig:
base, ext = os.path.splitext(afile)
os.rename(afile, base+".orig")
else:
os.remove(afile)
makenewfile(afile, fstr)
def _func(arg, dirname, fnames):
convertall(dirname, orig=0)
convertsrc(dirname, ['h','c'], orig=0)
def converttree(direc=os.path.curdir):
"""Convert all .py files in the tree given
"""
os.path.walk(direc, _func, None)
if __name__ == '__main__':
converttree(sys.argv)
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