本文整理汇总了Python中qgis.core.QgsStringStatisticalSummary类的典型用法代码示例。如果您正苦于以下问题：Python QgsStringStatisticalSummary类的具体用法？Python QgsStringStatisticalSummary怎么用？Python QgsStringStatisticalSummary使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了QgsStringStatisticalSummary类的9个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: testIndividualStats
def testIndividualStats(self):
# tests calculation of statistics one at a time, to make sure statistic calculations are not
# dependent on each other
tests = [{'stat': QgsStringStatisticalSummary.Count, 'expected': 9},
{'stat': QgsStringStatisticalSummary.CountDistinct, 'expected': 6},
{'stat': QgsStringStatisticalSummary.CountMissing, 'expected': 2},
{'stat': QgsStringStatisticalSummary.Min, 'expected': 'aaaa'},
{'stat': QgsStringStatisticalSummary.Max, 'expected': 'eeee'},
{'stat': QgsStringStatisticalSummary.MinimumLength, 'expected': 0},
{'stat': QgsStringStatisticalSummary.MaximumLength, 'expected': 8},
]
s = QgsStringStatisticalSummary()
for t in tests:
# test constructor
s2 = QgsStringStatisticalSummary(t['stat'])
self.assertEqual(s2.statistics(), t['stat'])
s.setStatistics(t['stat'])
self.assertEqual(s.statistics(), t['stat'])
s.calculate(['cc', 'aaaa', 'bbbbbbbb', 'aaaa', 'eeee', '', 'eeee', '', 'dddd'])
self.assertEqual(s.statistic(t['stat']), t['expected'])
# display name
self.assertTrue(len(QgsStringStatisticalSummary.displayName(t['stat'])) > 0)示例2: testVariantStats
def testVariantStats(self):
s = QgsStringStatisticalSummary()
self.assertEqual(s.statistics(), QgsStringStatisticalSummary.All)
s.calculateFromVariants(['cc', 5, 'bbbb', 'aaaa', 'eeee', 6, 9, '9', ''])
self.assertEqual(s.count(), 6)
self.assertEqual(set(s.distinctValues()), set(['cc', 'aaaa', 'bbbb', 'eeee', '', '9']))
self.assertEqual(s.countMissing(), 1)
self.assertEqual(s.min(), '9')
self.assertEqual(s.max(), 'eeee')示例3: testVariantStats
def testVariantStats(self):
s = QgsStringStatisticalSummary()
self.assertEqual(s.statistics(), QgsStringStatisticalSummary.All)
s.calculateFromVariants(["cc", 5, "bbbb", "aaaa", "eeee", 6, 9, "9", ""])
self.assertEqual(s.count(), 6)
self.assertEqual(set(s.distinctValues()), set(["cc", "aaaa", "bbbb", "eeee", "", "9"]))
self.assertEqual(s.countMissing(), 1)
self.assertEqual(s.min(), "9")
self.assertEqual(s.max(), "eeee")示例4: testStats
def testStats(self):
# we test twice, once with values added as a list and once using values
# added one-at-a-time
s = QgsStringStatisticalSummary()
self.assertEqual(s.statistics(), QgsStringStatisticalSummary.All)
strings = ['cc', 'aaaa', 'bbbbbbbb', 'aaaa', 'eeee', '', 'eeee', '', 'dddd']
s.calculate(strings)
s2 = QgsStringStatisticalSummary()
for string in strings:
s2.addString(string)
s2.finalize()
self.assertEqual(s.count(), 9)
self.assertEqual(s2.count(), 9)
self.assertEqual(s.countDistinct(), 6)
self.assertEqual(s2.countDistinct(), 6)
self.assertEqual(set(s.distinctValues()), set(['cc', 'aaaa', 'bbbbbbbb', 'eeee', 'dddd', '']))
self.assertEqual(s2.distinctValues(), s.distinctValues())
self.assertEqual(s.countMissing(), 2)
self.assertEqual(s2.countMissing(), 2)
self.assertEqual(s.min(), 'aaaa')
self.assertEqual(s2.min(), 'aaaa')
self.assertEqual(s.max(), 'eeee')
self.assertEqual(s2.max(), 'eeee')
self.assertEqual(s.minLength(), 0)
self.assertEqual(s2.minLength(), 0)
self.assertEqual(s.maxLength(), 8)
self.assertEqual(s2.maxLength(), 8)
self.assertEqual(s.meanLength(), 3.33333333333333333333333)
self.assertEqual(s2.meanLength(), 3.33333333333333333333333)
#extra check for minLength without empty strings
s.calculate(['1111111', '111', '11111'])
self.assertEqual(s.minLength(), 3)示例5: calcStringStats
def calcStringStats(self, features, feedback, field, count):
total = 100.0 / count if count else 1
stat = QgsStringStatisticalSummary()
for current, ft in enumerate(features):
if feedback.isCanceled():
break
stat.addValue(ft[field.name()])
feedback.setProgress(int(current * total))
stat.finalize()
results = {self.COUNT: stat.count(),
self.UNIQUE: stat.countDistinct(),
self.EMPTY: stat.countMissing(),
self.FILLED: stat.count() - stat.countMissing(),
self.MIN: stat.min(),
self.MAX: stat.max(),
self.MIN_LENGTH: stat.minLength(),
self.MAX_LENGTH: stat.maxLength(),
self.MEAN_LENGTH: stat.meanLength()}
data = []
data.append(self.tr('Count: {}').format(count))
data.append(self.tr('Unique values: {}').format(stat.countDistinct()))
data.append(self.tr('NULL (missing) values: {}').format(stat.countMissing()))
data.append(self.tr('Minimum value: {}').format(stat.min()))
data.append(self.tr('Maximum value: {}').format(stat.max()))
data.append(self.tr('Minimum length: {}').format(stat.minLength()))
data.append(self.tr('Maximum length: {}').format(stat.maxLength()))
data.append(self.tr('Mean length: {}').format(stat.meanLength()))
return data, results示例6: calcStringStats
def calcStringStats(self, values, sink, feedback):
stat = QgsStringStatisticalSummary()
total = 50.0 / len(values) if values else 0
current = 0
for cat, v in values.items():
if feedback.isCanceled():
break
feedback.setProgress(int(current * total) + 50)
stat.calculate(v)
f = QgsFeature()
f.setAttributes(list(cat) + [stat.count(),
stat.countDistinct(),
stat.countMissing(),
stat.count() - stat.countMissing(),
stat.min(),
stat.max(),
stat.minLength(),
stat.maxLength(),
stat.meanLength()
])
sink.addFeature(f, QgsFeatureSink.FastInsert)
current += 1示例7: calcStringStats
def calcStringStats(self, features, progress, field):
count = len(features)
total = 100.0 / float(count)
stat = QgsStringStatisticalSummary()
for current, ft in enumerate(features):
stat.addValue(ft[field.name()])
progress.setPercentage(int(current * total))
stat.finalize()
self.setOutputValue(self.COUNT, stat.count())
self.setOutputValue(self.UNIQUE, stat.countDistinct())
self.setOutputValue(self.EMPTY, stat.countMissing())
self.setOutputValue(self.FILLED, stat.count() - stat.countMissing())
self.setOutputValue(self.MIN, stat.min())
self.setOutputValue(self.MAX, stat.max())
self.setOutputValue(self.MIN_LENGTH, stat.minLength())
self.setOutputValue(self.MAX_LENGTH, stat.maxLength())
self.setOutputValue(self.MEAN_LENGTH, stat.meanLength())
data = []
data.append(self.tr('Count: {}').format(count))
data.append(self.tr('Unique values: {}').format(stat.countDistinct()))
data.append(self.tr('NULL (missing) values: {}').format(stat.countMissing()))
data.append(self.tr('Minimum value: {}').format(stat.min()))
data.append(self.tr('Maximum value: {}').format(stat.max()))
data.append(self.tr('Minimum length: {}').format(stat.minLength()))
data.append(self.tr('Maximum length: {}').format(stat.maxLength()))
data.append(self.tr('Mean length: {}').format(stat.meanLength()))
return data示例8: testStats
def testStats(self):
s = QgsStringStatisticalSummary()
self.assertEqual(s.statistics(), QgsStringStatisticalSummary.All)
s.calculate(['cc', 'aaaa', 'bbbbbbbb', 'aaaa', 'eeee', '', 'eeee', '', 'dddd'])
self.assertEqual(s.count(), 9)
self.assertEqual(s.countDistinct(), 6)
self.assertEqual(set(s.distinctValues()), set(['cc', 'aaaa', 'bbbbbbbb', 'eeee', 'dddd', '']))
self.assertEqual(s.countMissing(), 2)
self.assertEqual(s.min(), 'aaaa')
self.assertEqual(s.max(), 'eeee')
self.assertEqual(s.minLength(), 0)
self.assertEqual(s.maxLength(), 8)
#extra check for minLength without empty strings
s.calculate(['1111111', '111', '11111'])
self.assertEqual(s.minLength(), 3)示例9: testIndividualStats
def testIndividualStats(self):
# tests calculation of statistics one at a time, to make sure statistic calculations are not
# dependent on each other
tests = [
{"stat": QgsStringStatisticalSummary.Count, "expected": 9},
{"stat": QgsStringStatisticalSummary.CountDistinct, "expected": 6},
{"stat": QgsStringStatisticalSummary.CountMissing, "expected": 2},
{"stat": QgsStringStatisticalSummary.Min, "expected": "aaaa"},
{"stat": QgsStringStatisticalSummary.Max, "expected": "eeee"},
{"stat": QgsStringStatisticalSummary.MinimumLength, "expected": 0},
{"stat": QgsStringStatisticalSummary.MaximumLength, "expected": 8},
{"stat": QgsStringStatisticalSummary.MeanLength, "expected": 3.3333333333333335},
]
s = QgsStringStatisticalSummary()
s3 = QgsStringStatisticalSummary()
for t in tests:
# test constructor
s2 = QgsStringStatisticalSummary(t["stat"])
self.assertEqual(s2.statistics(), t["stat"])
s.setStatistics(t["stat"])
s3.setStatistics(t["stat"])
self.assertEqual(s.statistics(), t["stat"])
strings = ["cc", "aaaa", "bbbbbbbb", "aaaa", "eeee", "", "eeee", "", "dddd"]
s.calculate(strings)
s3.reset()
for string in strings:
s3.addString(string)
s3.finalize()
self.assertEqual(s.statistic(t["stat"]), t["expected"])
self.assertEqual(s3.statistic(t["stat"]), t["expected"])
# display name
self.assertTrue(len(QgsStringStatisticalSummary.displayName(t["stat"])) > 0)