New translations checkdata.py (Chinese Simplified)

lang/zh/gklearn/gedlib/lib/libsvm.3.22/tools/checkdata.py

@@ -0,0 +1,108 @@
+#!/usr/bin/env python
+
+#
+# A format checker for LIBSVM
+#
+
+#
+# Copyright (c) 2007, Rong-En Fan
+#
+# All rights reserved.
+#
+# This program is distributed under the same license of the LIBSVM package.
+# 
+
+from sys import argv, exit
+import os.path
+
+def err(line_no, msg):
+	print("line {0}: {1}".format(line_no, msg))
+
+# works like float() but does not accept nan and inf
+def my_float(x):
+	if x.lower().find("nan") != -1 or x.lower().find("inf") != -1:
+		raise ValueError
+
+	return float(x)
+
+def main():
+	if len(argv) != 2:
+		print("Usage: {0} dataset".format(argv[0]))
+		exit(1)
+
+	dataset = argv[1]
+
+	if not os.path.exists(dataset):
+		print("dataset {0} not found".format(dataset))
+		exit(1)
+
+	line_no = 1
+	error_line_count = 0
+	for line in open(dataset, 'r'):
+		line_error = False
+
+		# each line must end with a newline character
+		if line[-1] != '\n':
+			err(line_no, "missing a newline character in the end")
+			line_error = True
+
+		nodes = line.split()
+
+		# check label
+		try:
+			label = nodes.pop(0)
+			
+			if label.find(',') != -1:
+				# multi-label format
+				try:
+					for l in label.split(','):
+						l = my_float(l)
+				except:
+					err(line_no, "label {0} is not a valid multi-label form".format(label))
+					line_error = True
+			else:
+				try:
+					label = my_float(label)
+				except:
+					err(line_no, "label {0} is not a number".format(label))
+					line_error = True
+		except:
+			err(line_no, "missing label, perhaps an empty line?")
+			line_error = True
+
+		# check features
+		prev_index = -1
+		for i in range(len(nodes)):
+			try:
+				(index, value) =  nodes[i].split(':')
+
+				index = int(index)
+				value = my_float(value)
+
+				# precomputed kernel's index starts from 0 and LIBSVM
+				# checks it. Hence, don't treat index 0 as an error.
+				if index < 0:
+					err(line_no, "feature index must be positive; wrong feature {0}".format(nodes[i]))
+					line_error = True
+				elif index <= prev_index:
+					err(line_no, "feature indices must be in an ascending order, previous/current features {0} {1}".format(nodes[i-1], nodes[i]))
+					line_error = True
+				prev_index = index
+			except:
+				err(line_no, "feature '{0}' not an <index>:<value> pair, <index> integer, <value> real number ".format(nodes[i]))
+				line_error = True
+
+		line_no += 1
+
+		if line_error:
+			error_line_count += 1
+	
+	if error_line_count > 0:
+		print("Found {0} lines with error.".format(error_line_count))
+		return 1
+	else:
+		print("No error.")
+		return 0
+
+if __name__ == "__main__":
+	exit(main())