/usr/lib/python2.7/dist-packages/stetl/util.py is in python-stetl 1.1+ds-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 | # -*- coding: utf-8 -*-
#
# Utility functions and classes.
#
# Author:Just van den Broecke
import logging
import os
import glob
import types
from time import time
from ConfigParser import ConfigParser
logging.basicConfig(level=logging.INFO,
format='%(asctime)s %(name)s %(levelname)s %(message)s')
# Static utility methods
class Util:
# http://wiki.tei-c.org/index.php/Remove-Namespaces.xsl
xslt_strip_ns = '''<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" indent="no"/>
<xsl:template match="/|comment()|processing-instruction()">
<xsl:copy>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>
<xsl:template match="*">
<xsl:element name="{local-name()}">
<xsl:apply-templates select="@*|node()"/>
</xsl:element>
</xsl:template>
<xsl:template match="@*">
<xsl:attribute name="{local-name()}">
<xsl:value-of select="."/>
</xsl:attribute>
</xsl:template>
</xsl:stylesheet>
'''
xslt_strip_ns_doc = False
@staticmethod
def get_log(name):
log = logging.getLogger(name)
log.setLevel(logging.DEBUG)
return log
@staticmethod
def make_file_list(candidate_file, file_list=None, filename_pattern='*.[gxGX][mM][lL]', depth_search=False):
if file_list is None:
file_list = []
candidate_file = candidate_file.strip()
input_list = candidate_file.split(',')
if len(input_list) > 1:
for file in input_list:
Util.make_file_list(file, file_list, filename_pattern, depth_search)
return file_list
if os.path.isdir(candidate_file):
# Is a dir: get list
matching_file_list = glob.glob(os.path.join(candidate_file, filename_pattern))
for file in matching_file_list:
# Matching file: append to file
file_list.append(file)
for dir in os.listdir(candidate_file):
dir = os.path.join(candidate_file, dir)
if os.path.isdir(dir):
Util.make_file_list(dir, file_list, filename_pattern, depth_search)
elif candidate_file.startswith('http'):
file_list.append(candidate_file)
else:
# A single file or list of files
matching_file_list = glob.glob(candidate_file)
for file in matching_file_list:
# Matching file: append to file
file_list.append(file)
return file_list
# Start (global) + print timer: useful to time for processing and optimization
@staticmethod
def start_timer(message=""):
log.info("Timer start: " + message)
return time()
# End (global) timer + print seconds passed: useful to time for processing and optimization
@staticmethod
def end_timer(start_time, message=""):
log.info("Timer end: " + message + " time=" + str(round((time() - start_time), 0)) + " sec")
# Convert a string to a dict
@staticmethod
def string_to_dict(s, separator='=', space='~'):
# Convert string to dict: http://stackoverflow.com/a/1248990
dict_arr = [x.split(separator) for x in s.split()]
for x in dict_arr:
x[1] = x[1].replace(space, ' ')
return dict(dict_arr)
# Convert a dict to a string
@staticmethod
def dict_to_string(dict_v):
# Convert/flatten dict to string http://codereview.stackexchange.com/questions/7953/how-do-i-flatten-a-dictionary-into-a-string
return ' '.join("%s=%r" % (key, val) for (key, val) in dict_v.iteritems())
# Convert a properties file to a dict
@staticmethod
def propsfile_to_dict(file_path):
# See http://stackoverflow.com/questions/2819696/parsing-properties-file-in-python
# Need a [section] header to parse .ini files, so fake it!
class FakeSecHead(object):
def __init__(self, fp):
self.fp = fp
self.sechead = '[asection]\n'
def readline(self):
if self.sechead:
try:
return self.sechead
finally:
self.sechead = None
else:
return self.fp.readline()
cp = ConfigParser()
cp.readfp(FakeSecHead(open(file_path)))
return cp._sections['asection']
@staticmethod
def elem_to_dict(elem, strip_space=True, strip_ns=True, sub=False, attr_prefix='', gml2ogr=True, ogr2json=True):
"""Convert an Element into an internal dictionary (not JSON!)."""
def splitNameSpace(tag):
if tag[0] == "{":
return tag[1:].split("}")
else:
return None, tag
def parseAttributes(attribs):
ns = set()
for attrib in attribs.keys():
if ':' in attrib:
ns.add(attrib.split(':')[0])
if len(ns) == 0:
return attribs
else:
result = {}
for x in ns:
result[x] = {}
for attrib, value in attribs.items():
if ':' in attrib:
this_ns, tag = attrib.split(':')
result[this_ns][attr_prefix + tag] = value
else:
result[attrib] = value
return result
def parseChildren(tags):
final = {}
for x in tags:
prepend = {}
result = ""
uri, tag = splitNameSpace(x.tag)
# if uri is not None:
# prepend['$$'] = uri
if len(x.attrib) > 0:
prepend = dict(prepend.items() + parseAttributes(x.attrib).items())
if len(x) == 0:
if x.text is not None:
if len(prepend) == 0:
result = x.text
else:
result = dict(prepend.items() + {"$": x.text}.items())
else:
if len(prepend) > 0:
result = prepend
else:
if len(prepend) == 0:
result = {"$": parseChildren(x.getchildren())}
else:
result = dict(prepend.items() + {"$": parseChildren(x.getchildren())}.items())
if tag in final:
if not isinstance(final[tag], types.ListType):
final[tag] = [final[tag]]
final[tag].append(result)
else:
final[tag] = result
return final
# Build-up structure
# First the attributes in dict, optionally split-off NS
d = {}
for key, value in elem.attrib.items():
if strip_ns is True:
uri, key = splitNameSpace(key)
d[attr_prefix + key] = value
# Loop over sub-elements to merge them
is_geom = False
value = None
for subelem in elem:
tag = subelem.tag
uri, bare_tag = splitNameSpace(tag)
is_geom = False
# What to do if GML Geometry found...
if gml2ogr and bare_tag in ['Point', 'Polygon', 'MultiPolygon', 'LineString', 'MultiLineString']:
is_geom = True
# Create OGR Geometry object from GML string
value = etree.tostring(subelem)
from osgeo import ogr
geom = ogr.CreateGeometryFromGML(value)
value = geom
if ogr2json:
# Make OGR Geometry object a GeoJSON internal structure like
# { "type": "Point",
# "coordinates": [4.894836363636363, 52.373045454545455] }
import ast
# http://stackoverflow.com/questions/988228/converting-a-string-to-dictionary
# ast.literal_eval("{'muffin' : 'lolz', 'foo' : 'kitty'}")
value = ast.literal_eval(geom.ExportToJson())
else:
v = Util.elem_to_dict(subelem, strip_space=strip_space, strip_ns=strip_ns, sub=True,
attr_prefix=attr_prefix, ogr2json=ogr2json, gml2ogr=gml2ogr)
value = v[subelem.tag]
if strip_ns is True:
tag = bare_tag
try:
# add to existing list for this tag
d[tag].append(value)
except AttributeError:
# turn existing entry into a list
d[tag] = [d[tag], value]
except KeyError:
# add a new non-list entry
d[tag] = value
text = elem.text
tail = elem.tail
if strip_space is True:
# ignore leading and trailing whitespace
if text:
text = text.strip()
if tail:
tail = tail.strip()
if tail:
d['#tail'] = tail
if d:
# use #text element if other attributes exist
if text:
d["#text"] = text
# We replace the tag like 'Polygon' when we have a geometry
if is_geom:
d = value
else:
# text is the value if no attributes
d = text or None
elem_tag = elem.tag
if strip_ns is True and sub is False:
uri, elem_tag = splitNameSpace(elem_tag)
return {elem_tag: d}
# Remove all Namespaces from an etree Node
# Handy for e.g. XPath expressions
@staticmethod
def stripNamespaces(node):
if Util.xslt_strip_ns_doc is not None:
Util.xslt_strip_ns_doc = etree.fromstring(Util.xslt_strip_ns)
transform = etree.XSLT(Util.xslt_strip_ns_doc)
return transform(node)
@staticmethod
def xpath_get(mydict, path):
"""
XPath-like query for nested dicts/JSON-type structures.
See: http://stackoverflow.com/questions/7320319/xpath-like-query-for-nested-python-dictionaries
Example::
foo = {
'spam':'eggs',
'morefoo': [{
'bar':'soap',
'morebar': {
'bacon' : {
'bla':'balbla'
}
}
},
'bla'
]
}
print xpath_get(foo, "/morefoo/0/morebar/bacon")
:param mydict: a nested dict
:param path: path to member
:return: found member or none
"""
elem = mydict
try:
for x in path.strip("/").split("/"):
try:
x = int(x)
elem = elem[x]
except ValueError:
elem = elem.get(x)
except Exception:
pass
return elem
log = Util.get_log("util")
# Try several imports, centralized to give warnings once
try:
from cStringIO import StringIO
log.info("Found cStringIO, good!")
except Exception:
from StringIO import StringIO
log.warning("Found %s - this is suboptimal, try cStringIO" % str(type(StringIO)))
try:
from lxml import etree
log.info("Found lxml.etree, native XML parsing, fabulous!")
except ImportError:
try:
# Python 2.5
import xml.etree.cElementTree as etree
log.warning("running with cElementTree on Python 2.5+ (suboptimal)")
except ImportError:
try:
# Python 2.5
import xml.etree.ElementTree as etree
log.warning("running with ElementTree on Python 2.5+")
except ImportError:
try:
# normal cElementTree install
import cElementTree as etree
log.warning("running with cElementTree")
except ImportError:
try:
# normal ElementTree install
import elementtree.ElementTree as etree
log.warning("running with ElementTree")
except ImportError:
log.warning("Failed to import ElementTree from any known place")
gdal = None
ogr = None
osr = None
try:
from osgeo import gdal
from osgeo import ogr
from osgeo import osr
except ImportError:
log.warn("No osgeo.gdal|ogr|osr packages found, trying direct import...")
try:
import gdal
import ogr
import osr
except ImportError:
log.warn(
"No GDAL/OGR Python bindings. Ok if not using GDAL/OGR functions. See https://pypi.python.org/pypi/GDAL")
if ogr and gdal and osr:
log.info("Found GDAL/OGR Python bindings, super!!")
class ConfigSection():
def __init__(self, config_section):
self.config_dict = dict(config_section)
def has(self, name):
return name in self.config_dict
def get(self, name, default=None):
if name not in self.config_dict:
return default
return self.config_dict[name]
def get_int(self, name, default=-1):
result = self.get(name)
if result is None:
result = default
else:
result = int(result)
return result
# Get value as bool
def get_bool(self, name, default=False):
s = self.get(name)
if s is None:
result = default
else:
if s == 'false' or s == 'False':
result = False
else:
if s == 'true' or s == 'True':
result = True
else:
result = bool(s)
return result
# Get value as list
def get_list(self, name, split_char=',', default=None):
result = self.get(name)
if result is None:
result = default
else:
result = result.split(split_char)
return result
# Get value as tuple
def get_tuple(self, name, split_char=',', default=None):
result = self.get_list(name, split_char)
if result is None:
result = default
else:
result = tuple(result)
return result
def get_dict(self, name=None, default=None):
"""
Get value as dict or entire config dict if no name given
"""
if name is None:
return self.config_dict
result = self.get(name)
if result is None:
result = default
else:
import ast
# http://stackoverflow.com/questions/988228/converting-a-string-to-dictionary
# ast.literal_eval("{'muffin' : 'lolz', 'foo' : 'kitty'}")
result = ast.literal_eval(result)
return result
def to_string(self):
return repr(self.config_dict)
|