print() is a function in Python 3

modules/core/src/opencl/runtime/generator/common.py

+from __future__ import print_function
 import sys, os, re
 
 #
@@ -84,7 +85,7 @@ def readFunctionFilter(fns, fileName):
     try:
         f = open(fileName, "r")
     except:
-        print "ERROR: Can't open filter file: %s" % fileName
+        print("ERROR: Can't open filter file: %s" % fileName)
         return 0
 
     count = 0
@@ -133,8 +134,8 @@ def outputToString(f):
 @outputToString
 def generateFilterNames(fns):
     for fn in fns:
-        print '%s%s' % ('' if fn.has_key('enabled') else '//', fn['name'])
-    print '#total %d' % len(fns)
+        print('%s%s' % ('' if 'enabled' in fn else '//', fn['name']))
+    print('#total %d' % len(fns))
 
 callback_check = re.compile(r'([^\(]*\(.*)(\* *)(\).*\(.*\))')
 
@@ -145,100 +146,100 @@ def getTypeWithParam(t, p):
 
 @outputToString
 def generateStructDefinitions(fns, lprefix='opencl_fn', enumprefix='OPENCL_FN'):
-    print '// generated by %s' % os.path.basename(sys.argv[0])
+    print('// generated by %s' % os.path.basename(sys.argv[0]))
     for fn in fns:
-        commentStr = '' if fn.has_key('enabled') else '//'
+        commentStr = '' if 'enabled' in fn else '//'
         decl_args = []
         for (i, t) in enumerate(fn['params']):
             decl_args.append(getTypeWithParam(t, 'p%d' % (i+1)))
         decl_args_str = '(' + (', '.join(decl_args)) + ')'
-        print '%s%s%d(%s_%s, %s, %s)' % \
+        print('%s%s%d(%s_%s, %s, %s)' % \
              (commentStr, lprefix, len(fn['params']), enumprefix, fn['name'], \
-             ' '.join(fn['ret']), decl_args_str)
-        print commentStr + ('%s%s (%s *%s)(%s) =\n%s        %s_%s_switch_fn;' % \
+             ' '.join(fn['ret']), decl_args_str))
+        print(commentStr + ('%s%s (%s *%s)(%s) =\n%s        %s_%s_switch_fn;' % \
             ((' '.join(fn['modifiers'] + ' ') if len(fn['modifiers']) > 0 else ''),
              ' '.join(fn['ret']), ' '.join(fn['calling']), fn['name'], ', '.join(fn['params']), \
-             commentStr, enumprefix, fn['name']))
-        print commentStr + ('static const struct DynamicFnEntry %s_definition = { "%s", (void**)&%s};' % (fn['name'], fn['name'], fn['name']))
-        print
+             commentStr, enumprefix, fn['name'])))
+        print(commentStr + ('static const struct DynamicFnEntry %s_definition = { "%s", (void**)&%s};' % (fn['name'], fn['name'], fn['name'])))
+        print()
 
 @outputToString
 def generateStaticDefinitions(fns):
-    print '// generated by %s' % os.path.basename(sys.argv[0])
+    print('// generated by %s' % os.path.basename(sys.argv[0]))
     for fn in fns:
-        commentStr = '' if fn.has_key('enabled') else '//'
+        commentStr = '' if 'enabled' in fn else '//'
         decl_args = []
         for (i, t) in enumerate(fn['params']):
             decl_args.append(getTypeWithParam(t, 'p%d' % (i+1)))
         decl_args_str = '(' + (', '.join(decl_args)) + ')'
-        print commentStr + ('CL_RUNTIME_EXPORT %s%s (%s *%s_pfn)(%s) = %s;' % \
+        print(commentStr + ('CL_RUNTIME_EXPORT %s%s (%s *%s_pfn)(%s) = %s;' % \
             ((' '.join(fn['modifiers'] + ' ') if len(fn['modifiers']) > 0 else ''),
              ' '.join(fn['ret']), ' '.join(fn['calling']), fn['name'], ', '.join(fn['params']), \
-             fn['name']))
+             fn['name'])))
 
 @outputToString
 def generateListOfDefinitions(fns, name='opencl_fn_list'):
-    print '// generated by %s' % os.path.basename(sys.argv[0])
-    print 'static const struct DynamicFnEntry* %s[] = {' % (name)
+    print('// generated by %s' % os.path.basename(sys.argv[0]))
+    print('static const struct DynamicFnEntry* %s[] = {' % (name))
     for fn in fns:
-        commentStr = '' if fn.has_key('enabled') else '//'
-        if fn.has_key('enabled'):
-            print '    &%s_definition,' % (fn['name'])
+        commentStr = '' if 'enabled' in fn else '//'
+        if 'enabled' in fn:
+            print('    &%s_definition,' % (fn['name']))
         else:
-            print '    NULL/*&%s_definition*/,' % (fn['name'])
+            print('    NULL/*&%s_definition*/,' % (fn['name']))
         first = False
-    print '};'
+    print('};')
 
 @outputToString
 def generateEnums(fns, prefix='OPENCL_FN'):
-    print '// generated by %s' % os.path.basename(sys.argv[0])
-    print 'enum %s_ID {' % prefix
+    print('// generated by %s' % os.path.basename(sys.argv[0]))
+    print('enum %s_ID {' % prefix)
     for (i, fn) in enumerate(fns):
-        commentStr = '' if fn.has_key('enabled') else '//'
-        print commentStr + ('    %s_%s = %d,' % (prefix, fn['name'], i))
-    print '};'
+        commentStr = '' if 'enabled' in fn else '//'
+        print(commentStr + ('    %s_%s = %d,' % (prefix, fn['name'], i)))
+    print('};')
 
 @outputToString
 def generateRemapOrigin(fns):
-    print '// generated by %s' % os.path.basename(sys.argv[0])
+    print('// generated by %s' % os.path.basename(sys.argv[0]))
     for fn in fns:
-        print '#define %s %s_' % (fn['name'], fn['name'])
+        print('#define %s %s_' % (fn['name'], fn['name']))
 
 @outputToString
 def generateRemapDynamic(fns):
-    print '// generated by %s' % os.path.basename(sys.argv[0])
+    print('// generated by %s' % os.path.basename(sys.argv[0]))
     for fn in fns:
-        print '#undef %s' % (fn['name'])
-        commentStr = '' if fn.has_key('enabled') else '//'
-        print commentStr + ('#define %s %s_pfn' % (fn['name'], fn['name']))
+        print('#undef %s' % (fn['name']))
+        commentStr = '' if 'enabled' in fn else '//'
+        print(commentStr + ('#define %s %s_pfn' % (fn['name'], fn['name'])))
 
 @outputToString
 def generateFnDeclaration(fns):
-    print '// generated by %s' % os.path.basename(sys.argv[0])
+    print('// generated by %s' % os.path.basename(sys.argv[0]))
     for fn in fns:
-        commentStr = '' if fn.has_key('enabled') else '//'
-        print commentStr + ('extern CL_RUNTIME_EXPORT %s %s (%s *%s)(%s);' % (' '.join(fn['modifiers']), ' '.join(fn['ret']), ' '.join(fn['calling']),
-                                  fn['name'], ', '.join(fn['params'] if not fn.has_key('params_full') else fn['params_full'])))
+        commentStr = '' if 'enabled' in fn else '//'
+        print(commentStr + ('extern CL_RUNTIME_EXPORT %s %s (%s *%s)(%s);' % (' '.join(fn['modifiers']), ' '.join(fn['ret']), ' '.join(fn['calling']),
+                                  fn['name'], ', '.join(fn['params'] if 'params_full' not in fn else fn['params_full']))))
 
 @outputToString
 def generateTemplates(total, lprefix, switch_name, calling_convention=''):
-    print '// generated by %s' % os.path.basename(sys.argv[0])
+    print('// generated by %s' % os.path.basename(sys.argv[0]))
     for sz in range(total):
         template_params = ['ID', '_R', 'decl_args']
         params = ['p%d' % (i + 1) for i in range(0, sz)]
-        print '#define %s%d(%s) \\' % (lprefix, sz, ', '.join(template_params))
-        print '    typedef _R (%s *ID##FN)decl_args; \\' % (calling_convention)
-        print '    static _R %s ID##_switch_fn decl_args \\' % (calling_convention)
-        print '    { return ((ID##FN)%s(ID))(%s); } \\' % (switch_name, ', '.join(params))
-        print ''
+        print('#define %s%d(%s) \\' % (lprefix, sz, ', '.join(template_params)))
+        print('    typedef _R (%s *ID##FN)decl_args; \\' % (calling_convention))
+        print('    static _R %s ID##_switch_fn decl_args \\' % (calling_convention))
+        print('    { return ((ID##FN)%s(ID))(%s); } \\' % (switch_name, ', '.join(params)))
+        print('')
 
 @outputToString
 def generateInlineWrappers(fns):
-    print '// generated by %s' % os.path.basename(sys.argv[0])
+    print('// generated by %s' % os.path.basename(sys.argv[0]))
     for fn in fns:
-        commentStr = '' if fn.has_key('enabled') else '//'
-        print '#undef %s' % (fn['name'])
-        print commentStr + ('#define %s %s_fn' % (fn['name'], fn['name']))
+        commentStr = '' if 'enabled' in fn else '//'
+        print('#undef %s' % (fn['name']))
+        print(commentStr + ('#define %s %s_fn' % (fn['name'], fn['name'])))
         params = []
         call_params = []
         for i in range(0, len(fn['params'])):
@@ -251,23 +252,23 @@ def generateInlineWrappers(fns):
             call_params.append('p%d' % (i))
 
         if len(fn['ret']) == 1 and fn['ret'][0] == 'void':
-            print commentStr + ('inline void %s(%s) { %s_pfn(%s); }' \
-                    % (fn['name'], ', '.join(params), fn['name'], ', '.join(call_params)))
+            print(commentStr + ('inline void %s(%s) { %s_pfn(%s); }' \
+                    % (fn['name'], ', '.join(params), fn['name'], ', '.join(call_params))))
         else:
-            print commentStr + ('inline %s %s(%s) { return %s_pfn(%s); }' \
-                    % (' '.join(fn['ret']), fn['name'], ', '.join(params), fn['name'], ', '.join(call_params)))
+            print(commentStr + ('inline %s %s(%s) { return %s_pfn(%s); }' \
+                    % (' '.join(fn['ret']), fn['name'], ', '.join(params), fn['name'], ', '.join(call_params))))
 
 def ProcessTemplate(inputFile, ctx, noteLine='//\n// AUTOGENERATED, DO NOT EDIT\n//'):
     f = open(inputFile, "r")
     if noteLine:
-        print noteLine
+        print(noteLine)
     for line in f:
         if line.startswith('@'):
             assert line[-1] == '\n'
             line = line[:-1]  # remove '\n'
             assert line[-1] == '@'
             name = line[1:-1]
-            assert ctx.has_key(name), name
+            assert name in ctx, name
             line = ctx[name] + ('\n' if len(ctx[name]) > 0 and ctx[name][-1] != '\n' else '')
         sys.stdout.write(line)
     f.close()

modules/core/src/opencl/runtime/generator/parser_cl.py

@@ -2,6 +2,7 @@
 # usage:
 #     cat opencl11/cl.h | $0 cl_runtime_opencl11
 #     cat opencl12/cl.h | $0 cl_runtime_opencl12
+from __future__ import print_function
 import sys, re;
 
 from common import remove_comments, getTokens, getParameters, postProcessParameters
@@ -77,7 +78,7 @@ while True:
 
         name = parts[i]; i += 1;
         fn['name'] = name
-        print 'name=' + name
+        print('name=' + name)
 
         params = getParameters(i, parts)
 
@@ -88,7 +89,7 @@ while True:
 
 f.close()
 
-print 'Found %d functions' % len(fns)
+print('Found %d functions' % len(fns))
 
 postProcessParameters(fns)
 

modules/core/src/opencl/runtime/generator/parser_clamdblas.py

 #!/bin/python
 # usage:
 #     cat clAmdBlas.h | $0
+from __future__ import print_function
 import sys, re;
 
 from common import remove_comments, getTokens, getParameters, postProcessParameters
@@ -69,7 +70,7 @@ while True:
 
         name = parts[i]; i += 1;
         fn['name'] = name
-        print 'name=' + name
+        print('name=' + name)
 
         params = getParameters(i, parts)
 
@@ -80,7 +81,7 @@ while True:
 
 f.close()
 
-print 'Found %d functions' % len(fns)
+print('Found %d functions' % len(fns))
 
 postProcessParameters(fns)
 

modules/core/src/opencl/runtime/generator/parser_clamdfft.py

 #!/bin/python
 # usage:
 #     cat clAmdFft.h | $0
+from __future__ import print_function
 import sys, re;
 
 from common import remove_comments, getTokens, getParameters, postProcessParameters
@@ -63,7 +64,7 @@ while True:
 
         name = parts[i]; i += 1;
         fn['name'] = name
-        print 'name=' + name
+        print('name=' + name)
 
         params = getParameters(i, parts)
 
@@ -77,7 +78,7 @@ while True:
 
 f.close()
 
-print 'Found %d functions' % len(fns)
+print('Found %d functions' % len(fns))
 
 postProcessParameters(fns)
 

modules/dnn/misc/quantize_face_detector.py

+from __future__ import print_function
 import argparse
 import cv2 as cv
 import tensorflow as tf
@@ -199,8 +200,8 @@ with tf.Session() as sess:
     outDNN = cvNet.forward(out_nodes)
 
     outTF = sess.run([mbox_loc, mbox_conf_flatten], feed_dict={inp: inputData.transpose(0, 2, 3, 1)})
-    print 'Max diff @ locations:  %e' % np.max(np.abs(outDNN[0] - outTF[0]))
-    print 'Max diff @ confidence: %e' % np.max(np.abs(outDNN[1] - outTF[1]))
+    print('Max diff @ locations:  %e' % np.max(np.abs(outDNN[0] - outTF[0])))
+    print('Max diff @ confidence: %e' % np.max(np.abs(outDNN[1] - outTF[1])))
 
     # Save a graph
     graph_def = sess.graph.as_graph_def()

modules/java/check-tests.py

 #!/usr/bin/env python
 
+from __future__ import print_function
 import sys, os, re
 
 classes_ignore_list = (
@@ -148,9 +149,9 @@ class JavaParser:
 
 if __name__ == '__main__':
     if len(sys.argv) < 2:
-        print "Usage:\n", \
+        print("Usage:\n", \
             os.path.basename(sys.argv[0]), \
-            "<Classes/Tests dir1/file1> [<Classes/Tests dir2/file2> ...]\n", "Not tested methods are loggedto stdout."
+            "<Classes/Tests dir1/file1> [<Classes/Tests dir2/file2> ...]\n", "Not tested methods are loggedto stdout.")
         exit(0)
     parser = JavaParser()
     for x in sys.argv[1:]:

modules/ts/misc/perf_tests_timing.py

 #!/usr/bin/env python
 
+from __future__ import print_function
 import testlog_parser, sys, os, xml, glob, re
 from table_formatter import *
 from optparse import OptionParser
@@ -154,6 +155,6 @@ if __name__ == "__main__":
             htmlPrintFooter(sys.stdout)
         else:
             if not options.failedOnly:
-                print '\nOverall time: %.2f min\n' % overall_time
+                print('\nOverall time: %.2f min\n' % overall_time)
             tbl.consolePrintTable(sys.stdout)
-            print 2 * '\n'
+            print(2 * '\n')

modules/ts/misc/table_formatter.py

 #!/usr/bin/env python
 
+from __future__ import print_function
 import sys, re, os.path, cgi, stat, math
 from optparse import OptionParser
 from color import getColorizer, dummyColorizer
@@ -723,7 +724,7 @@ def formatValue(val, metric, units = None):
 
 if __name__ == "__main__":
     if len(sys.argv) < 2:
-        print "Usage:\n", os.path.basename(sys.argv[0]), "<log_name>.xml"
+        print("Usage:\n", os.path.basename(sys.argv[0]), "<log_name>.xml")
         exit(0)
 
     parser = OptionParser()

modules/ts/misc/testlog_parser.py

 #!/usr/bin/env python
 
+from __future__ import print_function
 import collections
 import re
 import os.path
@@ -108,7 +109,7 @@ class TestInfo(object):
 
 
     def dump(self, units="ms"):
-        print "%s ->\t\033[1;31m%s\033[0m = \t%.2f%s" % (str(self), self.status, self.get("gmean", units), units)
+        print("%s ->\t\033[1;31m%s\033[0m = \t%.2f%s" % (str(self), self.status, self.get("gmean", units), units))
 
 
     def getName(self):
@@ -198,22 +199,22 @@ def parseLogFile(filename):
 
 if __name__ == "__main__":
     if len(sys.argv) < 2:
-        print "Usage:\n", os.path.basename(sys.argv[0]), "<log_name>.xml"
+        print("Usage:\n", os.path.basename(sys.argv[0]), "<log_name>.xml")
         exit(0)
 
     for arg in sys.argv[1:]:
-        print "Processing {}...".format(arg)
+        print("Processing {}...".format(arg))
 
         run = parseLogFile(arg)
 
-        print "Properties:"
+        print("Properties:")
 
         for (prop_name, prop_value) in run.properties.items():
-          print "\t{} = {}".format(prop_name, prop_value)
+          print("\t{} = {}".format(prop_name, prop_value))
 
-        print "Tests:"
+        print("Tests:")
 
         for t in sorted(run.tests):
             t.dump()
 
-        print
+        print()

samples/dnn/fast_neural_style.py

+from __future__ import print_function
 import cv2 as cv
 import numpy as np
 import argparse
@@ -43,7 +44,7 @@ while cv.waitKey(1) < 0:
 
     t, _ = net.getPerfProfile()
     freq = cv.getTickFrequency() / 1000
-    print t / freq, 'ms'
+    print(t / freq, 'ms')
 
     if args.median_filter:
         out = cv.medianBlur(out, args.median_filter)

samples/dnn/mobilenet_ssd_accuracy.py

+from __future__ import print_function
 # Script to evaluate MobileNet-SSD object detection model trained in TensorFlow
 # using both TensorFlow and OpenCV. Example:
 #
@@ -115,14 +116,14 @@ pylab.rcParams['figure.figsize'] = (10.0, 8.0)
 annType = ['segm','bbox','keypoints']
 annType = annType[1]      #specify type here
 prefix = 'person_keypoints' if annType=='keypoints' else 'instances'
-print 'Running demo for *%s* results.'%(annType)
+print('Running demo for *%s* results.'%(annType))
 
 #initialize COCO ground truth api
 cocoGt=COCO(args.annotations)
 
 #initialize COCO detections api
 for resFile in ['tf_result.json', 'cv_result.json']:
-    print resFile
+    print(resFile)
     cocoDt=cocoGt.loadRes(resFile)
 
     cocoEval = COCOeval(cocoGt,cocoDt,annType)

samples/python/tutorial_code/imgProc/match_template/match_template.py

+from __future__ import print_function
 import sys
 import cv2 as cv
 
@@ -16,8 +17,8 @@ max_Trackbar = 5
 def main(argv):
 
     if (len(sys.argv) < 3):
-        print 'Not enough parameters'
-        print 'Usage:\nmatch_template_demo.py <image_name> <template_name> [<mask_name>]'
+        print('Not enough parameters')
+        print('Usage:\nmatch_template_demo.py <image_name> <template_name> [<mask_name>]')
         return -1
 
     ## [load_image]
@@ -33,7 +34,7 @@ def main(argv):
         mask = cv.imread( sys.argv[3], cv.IMREAD_COLOR )
 
     if ((img is None) or (templ is None) or (use_mask and (mask is None))):
-        print 'Can\'t read one of the images'
+        print('Can\'t read one of the images')
         return -1
     ## [load_image]