python: Use UTF-8 encodings for opened files

qa/pull-tester/rpc-tests.py

@@ -418,7 +418,7 @@ class RPCCoverage(object):
         if not os.path.isfile(coverage_ref_filename):
             raise RuntimeError("No coverage reference found")
 
-        with open(coverage_ref_filename, 'r') as f:
+        with open(coverage_ref_filename, 'r', encoding='utf8') as f:
             all_cmds.update([i.strip() for i in f.readlines()])
 
         for root, dirs, files in os.walk(self.dir):
@@ -427,7 +427,7 @@ class RPCCoverage(object):
                     coverage_filenames.add(os.path.join(root, filename))
 
         for filename in coverage_filenames:
-            with open(filename, 'r') as f:
+            with open(filename, 'r', encoding='utf8') as f:
                 covered_cmds.update([i.strip() for i in f.readlines()])
 
         return all_cmds - covered_cmds

qa/zcash/updatecheck.py

@@ -107,7 +107,7 @@ class GitHubToken:
     def __init__(self):
         token_path = os.path.join(SOURCE_ROOT, ".updatecheck-token")
         try:
-            with open(token_path) as f:
+            with open(token_path, encoding='utf8') as f:
                 token = f.read().strip()
                 self._user = token.split(":")[0]
                 self._password = token.split(":")[1]

src/test/bctest.py

@@ -39,7 +39,7 @@ def bctest(testDir, testObj, exeext):
     inputData = None
     if "input" in testObj:
         filename = testDir + "/" + testObj['input']
-        inputData = open(filename).read()
+        inputData = open(filename, encoding='utf8').read()
         stdinCfg = subprocess.PIPE
 
     # Read the expected output data (if there is any)
@@ -49,7 +49,7 @@ def bctest(testDir, testObj, exeext):
         outputFn = testObj['output_cmp']
         outputType = os.path.splitext(outputFn)[1][1:] # output type from file extension (determines how to compare)
         try:
-            outputData = open(testDir + "/" + outputFn).read()
+            outputData = open(testDir + "/" + outputFn, encoding='utf8').read()
         except:
             logging.error("Output file " + outputFn + " can not be opened")
             raise
@@ -105,7 +105,7 @@ def bctest(testDir, testObj, exeext):
 def bctester(testDir, input_basename, buildenv):
     """ Loads and parses the input file, runs all tests and reports results"""
     input_filename = testDir + "/" + input_basename
-    raw_data = open(input_filename).read()
+    raw_data = open(input_filename, encoding='utf8').read()
     input_data = json.loads(raw_data)
 
     failed_testcases = []