/usr/share/pyshared/openturns/coupling_tools.py is in python-openturns 1.2-2.
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# -*- Python -*-
#
# @file coupling_tools.py
# @brief Gives functions that help coupling against external code,
# .i.e: manipulate template file.
#
# Copyright (C) 2005-2013 EDF-EADS-Phimeca
#
# This library is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# along with this library. If not, see <http://www.gnu.org/licenses/>.
#
# @author souchaud
# @date 2012-08-28
#
import re
import shutil
import os
import shlex
import subprocess
import sys
import locale
import warnings
debug = False
default_encoding = sys.getdefaultencoding()
def check_param(obj, obj_type):
"""
private func
assert obj as type obj_type
"""
# int casts into long ; long is deprecated
if (obj_type == int) and (sys.version_info[0] < 3):
obj_type = long
try:
obj_type(obj)
except:
raise AssertionError("error: parameter (" +
str(type(obj)) + ": " + str(obj) +
") must be of " + str(obj_type) + "!")
def replace(infile, outfile, tokens, values, encoding=default_encoding):
"""
replace tokens on a file
parameters:
infile: template file that will be parsed
outfile: file that will received the template parsed. If equal to "None" or
to "infile", the result file will be moved to infile.
tokens: a list of regex that will be replaced
values: list of values (can be string, float, ...) that will replace
the tokens. The list must have the same size as tokens.
encoding: file encoding, see http://docs.python.org/2/library/codecs.html#codec-base-classes
exception:
AssertionError: parameters badly set
EOFError: a token has not been found
example:
# template.in = 'E=@E_VAR F=-PF-')
replace(infile="template.in",
outfile="prgm_data.in",
tokens=["@E_VAR", ".PF."],
values=[1.4, "5"])
# => prgm_data.in = 'E=1.4 F=5')
# be careful with overlapping tokens !!
# template.in = 'E=@E EE=@EE')
replace(infile="template.in",
outfile="prgm_data.in",
tokens=["@E", "@EE"],
values=[1, 2])
# => raise exception!! -> @EE token not found!
# (this is due to the first pass with token "@E" that modify
# prgm_data.in like this : 'E=1 EE=1E')
# deals with overlapping tokens : put longest tokens first
# template.in = 'E=@E EE=@EE')
replace(infile="template.in",
outfile="prgm_data.in",
tokens=["@EE", "@E"],
values=[2, 1])
# => prgm_data.in = 'E=1 EE=2')
"""
if len(tokens) != len(values):
raise AssertionError("Error: tokens size is != values size!")
check_param(tokens, list)
check_param(values, list)
inplace = False
if outfile == None or infile == outfile:
inplace = True
outfile = infile + ".temporary_outfile"
infile_handle = open(infile, 'rb')
outfile_handle = open(outfile, 'wb')
regex_tokens = []
found_tokens = []
for token in tokens:
regex_tokens.append(re.compile(token))
found_tokens.append(False)
for line in infile_handle:
line = line.decode(encoding)
i = 0
for regex_token in regex_tokens:
found = regex_token.search(line)
while found != None:
found_tokens[i] = True
line = line.replace(found.group(0), str(values[i]))
found = regex_token.search(line)
i += 1
outfile_handle.write(line.encode(encoding))
infile_handle.close()
outfile_handle.close()
for token, found_token in zip(tokens, found_tokens):
if found_token == False:
EOFError("Error: token '" + token + "' not found!")
if inplace:
os.remove(infile)
shutil.move(outfile, infile)
def execute(cmd, workdir=None, is_shell=False, shell_exe=None, hide_win=True,
check_exit_code=True, get_stdout=False, get_stderr=False):
"""
Launch an external processus in a clean way.
cmd: a string representing the command.
e.g.: "ls -l /home"
workdir: set the current directory of the executed command
is_shell: if set to True, the command is started in a shell (bash).
default: False.
shell_exe: path to the shell. e.g. /bin/zsh.
default: None -> /bin/bash.
hide_win: hide cmd.exe popup on windows
check_exit_code: if set to True: raise a RuntimeError exception if return
code of process != 0
get_stdout: whether standard output of the command is returned
get_stderr: whether standard error of the command is returned
return:
the exit code of the command
the stdout data if get_stdout parameter is set
the stderr data if get_stderr parameter is set
example:
ret, stdout = execute('/bin/ls /bin/kill', get_stdout=True).
# => ret = 0, stdout = '/bin/kill'
exception: RuntimeError
"""
# split cmd if not in a shell before passing it to os.execvp()
if not is_shell:
process_args = shlex.split(cmd)
else:
process_args = cmd
# override startupinfo to hide windows console
startupinfo = None
if hide_win and sys.platform.startswith('win'):
startupinfo = subprocess.STARTUPINFO()
startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
stdout = None
stderr = None
if get_stdout:
stdout = subprocess.PIPE
if get_stderr:
stderr = subprocess.PIPE
p = subprocess.Popen(process_args, shell=is_shell, cwd=workdir,
executable=shell_exe, stdout=stdout, stderr=stderr,
startupinfo=startupinfo)
if get_stdout or get_stderr:
stdout_data, stderr_data = p.communicate()
ret = p.wait()
# check return code
if check_exit_code and ret != 0:
raise RuntimeError('Command (' + cmd + ') returned exit code ' +
str(ret))
if get_stdout and get_stderr:
return ret, stdout_data, stderr_data
elif get_stdout:
return ret, stdout_data
elif get_stderr:
return ret, stderr_data
return ret
def get_regex(filename, patterns, encoding=default_encoding):
"""
get results from a file using regex
filename: the file to parse
patterns: a list of patterns that will permit to get the values.
\R and \I can be used to match float and integer.
\s can be used to match any whitespace character (= [ \t\n\r\f\v])
! \S can be used to match any non-whitespace character !
The value to be searched must be surrounded by '(' and ')' (see example).
encoding: file encoding, see http://docs.python.org/2/library/codecs.html#codec-base-classes
return: a list of values corresponding to each pattern.
If nothing has been found, the corresponding value is set to None.
exception:
AssertionError: parameters badly set
EOFError: no value found
example:
# simple (results.out = '@E=-9.5E8')
Y = get_regex(filename='results.out',
patterns=['@E=(\R)'])
# Y = [-9.5E8]
"""
if not isinstance(patterns, list) or len(patterns) == 0:
raise AssertionError("error: patterns parameter badly set!")
results = [None] * len(patterns)
re_patterns = []
for pattern in patterns:
# OT-like shortcuts
pattern = pattern.replace('\R',
'[+-]? *(?:\d+(?:\.\d*)?|\.\d+)(?:[eE][+-]?\d+)?')
pattern = pattern.replace('\I',
'[+-]? *\d+')
re_patterns.append(re.compile(pattern))
file_handle = open(filename, 'rb')
for line in file_handle:
line = line.decode(encoding)
i = 0
for re_pattern in re_patterns:
match = re_pattern.search(line)
if match:
results[i] = float(match.group(1))
i += 1
file_handle.close()
for result, pattern in zip(results, patterns):
if result == None:
raise EOFError('error: no pattern (' + pattern + ') found!')
return results
def get_real_from_line(line):
"""
private func
Try to get a real value from the beginning of a text line.
return: The float value if a real (or an integer) is found. Raise an
exception if nothing found.
"""
result = None
# print "token=" + str(token) + ', skip_token=' + str(skip_token) + ','\
# 'skip_line=' + str(skip_line) + ', skip_col=' + str(skip_col)
# \S*: spaces are allowed at the beginning of the real
real_regex = '\s*[+-]? *(?:\d+(?:\.\d*)?|\.\d+)(?:[eE][+-]?\d+)?'
#real_regex = '[+-]? *(?:\d+(?:\.\d*)?|\.\d+)(?:[eE][+-]?\d+)?'
re_real = re.compile(real_regex)
# get the value
match = re_real.match(line)
if match:
result = float(line[match.start():match.end()])
if result == None:
raise EOFError('error: real not found at the beginning of this line: '
'(' + line + ')!')
return result
def read_line(handle, seek=0, encoding=default_encoding):
"""
private func
get next line.
seek: if seek < 0: stop reading seek before the end of the file
encoding: file encoding, see http://docs.python.org/2/library/codecs.html#codec-base-classes
"""
line = handle.readline().decode(encoding)
if seek < 0 and line != '':
if handle.tell() > -seek:
if debug:
sys.stderr.write('line before cut ->' + line + '<-\n')
# cut the end of the line
line = line[:len(line) - (handle.tell() + seek)]
# after cut, if the line is empty, add a \n to behave like
# readline() python function
if line == '':
line = '\n'
# any further read will return ''
handle.seek(0, os.SEEK_END)
if debug:
sys.stderr.write('line after cut ->' + line + '<-\n')
if debug:
sys.stderr.write('read_line: ->' + line + '<-\n')
return line
def get_line_col(filename, skip_line=0, skip_col=0, seek=0, encoding=default_encoding):
"""
skip_line: number of lines skipped
If skip_line < 0: count lines backward from the end of the file.
Be careful: a last empty line is taken into account too!
Default: 0: no line skipped
skip_col: number of columns skipped from the beginning or end of the line.
If skip_col < 0: count col backward from the end of the line.
Default: 0: no column skipped
seek: if > 0, consider the file starts at pos seek.
if < 0, consider the file ends at pos -seek (and NOT (end-(-seek))!).
Default: 0: consider the whole file.
encoding: file encoding, see http://docs.python.org/2/library/codecs.html#codec-base-classes
"""
check_param(filename, str)
check_param(skip_line, int)
check_param(skip_col, int)
check_param(seek, int)
handle = open(filename, 'rb')
if seek > 0:
handle.seek(seek)
if debug:
sys.stderr.write('get_line_col(skip_line=' + str(skip_line) +
', skip_col=' + str(skip_col) + ', seek=' + str(seek) + ')\n')
# skip line backward
if skip_line < 0:
# cache position of each beginning of line
# last elt of the list is the last inserted
lines_cache = []
# determine number of elt to cache
lines_cache_size = -skip_line
# build lines cache
previous_pos = handle.tell()
line = read_line(handle, seek, encoding)
while line != '':
# append to cache
lines_cache.append(previous_pos)
if len(lines_cache) > lines_cache_size:
# todo: list not optimized to del before the end
del lines_cache[0]
previous_pos = handle.tell()
line = read_line(handle, seek, encoding)
if debug:
sys.stderr.write('lines_cache: ' + str(lines_cache) + '\n')
if len(lines_cache) < lines_cache_size:
err_msg = 'error: the file has less than ' + str(lines_cache_size) +\
' lines!'
handle.close()
raise EOFError(err_msg)
else:
handle.seek(lines_cache[0])
line_found = read_line(handle, seek, encoding)
if debug:
sys.stderr.write('line found: ->' + line_found + '<-\n')
# skip line forward
else:
while skip_line >= 0:
line = read_line(handle, seek, encoding)
if skip_line > 0 and line == '':
handle.close()
raise EOFError(
'error: the file has less lines than "skip_line"!')
skip_line -= 1
line_found = line
handle.close()
# get the good col
if skip_col != 0:
try:
line_found = line_found.split()[skip_col]
except:
raise EOFError('error: value not found on this line: (' +
line_found + ')!')
# get the value
result = get_real_from_line(line_found)
return result
def get_value(filename, token=None, skip_token=0, skip_line=0, skip_col=0, encoding=default_encoding):
"""
get one result from a file using token and/or various offsets
This function is optimized to be rather fast and takes low memory on human
readable file.
filename: a file that will be parsed
token: a regex that will be searched. The value right after the token is
returned.
Default: None (no token searched)
skip_token: the number of tokens that will be skipped before getting the
value. If set to != 0, the corresponding token parameter must not be
equal to None.
If skip_tokens < 0: count tokens backward from the end of the file.
Default: 0: no token skipped
skip_line: number of lines skipped from the token found.
If corresponding token equal None, skip from the beginning of the file.
If corresponding token != None, skip from the token.
If skip_line < 0: count lines backward from the token or from the end
of the file. Be careful: a last empty line is taken into account too.
Default: 0: no line skipped
skip_col: number of columns skipped from the token found.
If corresponding token = None, skip words from the beginning of the line.
If corresponding token != None, skip words from the token.
If skip_col < 0: count col backward from the end of the line or from
the token.
Default: 0: no column skipped
encoding: file encoding, see http://docs.python.org/2/library/codecs.html#codec-base-classes
return: a real value.
exception:
AssertionError: parameters badly set
EOFError: no value found
examples:
# simple token (results.out = ' @Y1=2.6, Y2= -6.6E56')
Y = coupling_tools.get_value(filename='results.out',
token='@Y1=',
)
# Y = 2.6
# using token ans skip_tokens (results.out =
'@Y1=5.9 @Y1=2.6 # temperature 2')
Y = coupling_tools.get_value(filename='results.out',
token='@Y1=',
skip_token=1,
)
# Y = 2.6
# using column & line (results.out = ' 2.6 3.5 6.8 9.0
3.6 7.5 6.9 9.8 ')
Y = coupling_tools.get_value(filename='results.out',
skip_line=1,
skip_col=-2,
)
# Y = 6.9
# mix it (results.out = ' 2.6 Y1=3.5 Y1=6.8 9.0
temperatures:
88.8 99.9 # ')
Y = coupling_tools.get_value(filename='results.out',
token='Y1=',
skip_token=1,
skip_line=0,
skip_col=1,
)
# Y = 9.0
"""
if debug:
sys.stderr.write("get_value(token=" + str(token) +
', skip_token=' + str(skip_token) +
', skip_line=' + str(skip_line) +
', skip_col=' + str(skip_col) + ')\n')
# check parameters
check_param(filename, str)
if token != None:
check_param(token, str)
elif skip_token != 0:
raise AssertionError("error: skip_token parameter needs token "
"parameter to be set!")
check_param(skip_token, int)
check_param(skip_line, int)
check_param(skip_col, int)
result = None
if not token:
result = get_line_col(filename, skip_line, skip_col, encoding=encoding)
else:
handle = open(filename, 'rb')
re_token = re.compile(token)
# store previous begin of line pos
line_pos = handle.tell()
# store token pos [elt 0: start pos of the token, elt 1: end of the
# token]
if skip_token >= 0:
token_pos = None
else:
token_pos_cache = []
line = handle.readline().decode(encoding)
while line != '':
for token_match in re_token.finditer(line):
if skip_token > 0:
# token found but it's not the good one
skip_token -= 1
elif skip_token == 0:
# token found
token_pos = [line_pos + token_match.start(),
line_pos + token_match.end()]
if debug:
sys.stderr.write(
'skip_token == 0, line: ' + line + '\n')
break
else:
# token wanted in revert order: we first cache them all
token_pos_cache.append([line_pos + token_match.start(),
line_pos + token_match.end()])
if skip_token >= 0 and token_pos != None:
# token found
break
line_pos = handle.tell()
line = handle.readline().decode(encoding)
# get the token from the cache
if skip_token < 0 and len(token_pos_cache) >= -skip_token:
token_pos = token_pos_cache[skip_token]
if token_pos == None:
handle.close()
raise EOFError('error: no token (' + token + ') was found!')
if skip_line == 0 and skip_col == 0:
# get the real right after the token
handle.seek(token_pos[1])
line = handle.readline().decode(encoding)
if debug:
sys.stderr.write('first token, line_found: ' + line + '\n')
result = get_real_from_line(line)
handle.close() # fixme: no multiple close?
else:
# get the real by skipping from the token
if skip_line < 0 or (skip_line == 0 and skip_col < 0):
# search before the token
seek_pos = -token_pos[0]
skip_line -= 1 # skip line from the token
else:
# search after the token
seek_pos = token_pos[1]
handle.close()
result = get_line_col(
filename, skip_line, skip_col, seek_pos, encoding=encoding)
return result
def get(filename, tokens=None, skip_tokens=None, skip_lines=None, skip_cols=None, encoding=default_encoding):
"""
get results from a file using token and/or various offsets
filename: a file that will be parsed
Each following parameters must be a list. The first element of each list
will be used to get the first value, the 2nd ...
If the parameter is set to None, the list is set to the default value of
get_value(), i.e skip_lines=None => [0, 0, ...].
tokens:
skip_tokens:
skip_lines:
skip_cols:
see get_value() function
encoding: file encoding, see http://docs.python.org/2/library/codecs.html#codec-base-classes
return: a list of real values.
exception:
AssertionError: parameters badly set
EOFError: no value found
examples:
# simple token (results.out = ' @Y1=2.6, Y2= -6.6E56')
Y = coupling_tools.get(filename='results.out',
tokens=['@Y1=', 'Y2='],
)
# Y = [2.6, -6.6E56]
# mix (results.out = ' 2.6 Y1=3.5 Y1=6.8 9.0
temperatures:
88.8 99.9 # ')
Y = coupling_tools.get(filename='results.out',
tokens=['Y1=', None],
skip_tokens=[1, 0],
skip_lines=[0, 2],
skip_cols=[1, 1],
)
# Y = [9.0, 99.9]
"""
# test parameters and determine the number of value to return
nb_values = None
if tokens != None:
nb_values = len(tokens)
err_msg = "error: skip_tokens parameter needs tokens parameter to be set!"
if skip_tokens != None:
if nb_values == None:
raise AssertionError(err_msg)
elif nb_values != len(skip_tokens):
raise AssertionError(err_msg)
if skip_lines != None:
if nb_values == None:
nb_values = len(skip_lines)
elif nb_values != len(skip_lines):
raise AssertionError(err_msg)
if skip_cols != None:
if nb_values == None:
nb_values = len(skip_cols)
elif nb_values != len(skip_cols):
raise AssertionError(err_msg)
if nb_values == None:
raise AssertionError("error: no parameters have been set!")
# init properly every list
if tokens == None:
tokens = [None] * nb_values
if skip_tokens == None:
skip_tokens = [0] * nb_values
if skip_lines == None:
skip_lines = [0] * nb_values
if skip_cols == None:
skip_cols = [0] * nb_values
results = [None] * nb_values
# possible optimization: get values in one pass
for n in range(nb_values):
results[n] = get_value(filename,
tokens[n],
skip_tokens[n],
skip_lines[n],
skip_cols[n],
encoding=encoding)
return results
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