python: Explicitly set encoding to utf8 when opening text files

qa/rpc-tests/hardforkdetection.py

@@ -17,7 +17,7 @@ class HardForkDetectionTest(BitcoinTestFramework):
     def setup_network(self):
         self.nodes = []
         self.alert_filename = os.path.join(self.options.tmpdir, "alert.txt")
-        with open(self.alert_filename, 'w'):
+        with open(self.alert_filename, 'w', encoding='utf8'):
             pass  # Just open then close to create zero-length file
         self.nodes.append(start_node(0, self.options.tmpdir,
                             ["-blockversion=2", "-alertnotify=echo %s >> \"" + self.alert_filename + "\""]))
@@ -48,7 +48,7 @@ def run_test(self):
         self.assert_safemode_on("We do not appear to fully agree with our peers!")
 
         # Check that an -alertnotify was triggered.
-        with open(self.alert_filename, 'r') as f:
+        with open(self.alert_filename, 'r', encoding='utf8') as f:
             alert_text = f.read()
 
         if len(alert_text) == 0:

qa/rpc-tests/sapling_rewind_check.py

@@ -98,7 +98,7 @@ def run_test(self):
         except:
             logpath = self.options.tmpdir + "/node2/regtest/debug.log"
             found = False
-            with open(logpath, 'r') as f:
+            with open(logpath, 'r', encoding='utf8') as f:
                 for line in f:
                     # Search for the rollback message in the debug log, and ensure that it has the
                     # correct expected rollback length.

qa/rpc-tests/test_framework/util.py

@@ -600,7 +600,7 @@ def check_node_log(self, node_number, line_to_check, stop_node = True):
         self.nodes[node_number].stop()
         bitcoind_processes[node_number].wait()
     logpath = self.options.tmpdir + "/node" + str(node_number) + "/regtest/debug.log"
-    with open(logpath, "r") as myfile:
+    with open(logpath, "r", encoding="utf8") as myfile:
         logdata = myfile.readlines()
     for (n, logline) in enumerate(logdata):
         if line_to_check in logline:

qa/rpc-tests/wallet_import_export.py

@@ -57,7 +57,7 @@ def run_test(self):
 
 # Helper functions
 def parse_wallet_file(dump_path):
-    file_lines = open(dump_path, "r").readlines()
+    file_lines = open(dump_path, "r", encoding="utf8").readlines()
     # We expect information about the HDSeed and fingerpring in the header
     assert_true("HDSeed" in file_lines[4], "Expected HDSeed")
     assert_true("fingerprint" in file_lines[4], "Expected fingerprint")

qa/zcash/smoke_tests.py

@@ -747,7 +747,7 @@ def start(self, extra_args=None, timewait=None):
             cli_args.append('-testnet=1')
         cli_args.append('getblockcount')
 
-        devnull = open('/dev/null', 'w+')
+        devnull = open('/dev/null', 'w+', encoding='utf8')
         if os.getenv('PYTHON_DEBUG', ''):
             print('start_node: zcashd started, calling zcash-cli -rpcwait getblockcount')
         subprocess.check_call(cli_args, stdout=devnull)

qa/zcash/updatecheck.py

@@ -303,7 +303,7 @@ def __init__(self, name):
 
     def current_version(self):
         mk_file_path = os.path.join(SOURCE_ROOT, "depends", "packages", safe_depends(self.name) + ".mk")
-        mk_file = open(mk_file_path, 'r').read()
+        mk_file = open(mk_file_path, 'r', encoding='utf8').read()
 
         regexp_whitelist = [
             "package\)_version=(\d+)\.(\d+)\.(\d+)$",
@@ -329,7 +329,7 @@ def current_version(self):
 class LevelDbVersionGetter:
     def current_version(self):
         header_path = os.path.join(SOURCE_ROOT, "src", "leveldb", "include", "leveldb", "db.h")
-        header_contents = open(header_path, 'r').read()
+        header_contents = open(header_path, 'r', encoding='utf8').read()
 
         match = re.search("kMajorVersion\s*=\s*(\d+);\s*.*kMinorVersion\s*=\s*(\d+);\s*$", header_contents, re.MULTILINE)
         if match:
@@ -340,7 +340,7 @@ def current_version(self):
 class UnivalueVersionGetter:
     def current_version(self):
         configure_path = os.path.join(SOURCE_ROOT, "src", "univalue", "configure.ac")
-        configure_contents = open(configure_path, 'r').read()
+        configure_contents = open(configure_path, 'r', encoding='utf8').read()
 
         match = re.search("AC_INIT.*univalue.*\[(\d+)\.(\d+)\.(\d+)\]", configure_contents)
         if match:
@@ -357,7 +357,7 @@ def __init__(self):
             "postponed-updates.txt"
         )
 
-        file = open(postponedlist_path, 'r')
+        file = open(postponedlist_path, 'r', encoding='utf8')
         for line in file.readlines():
             stripped = re.sub('#.*$', '', line).strip()
             if stripped != "":

zcutil/make-release.py

@@ -595,14 +595,14 @@ def __init__(self, path):
 
     def __enter__(self):
         logging.debug('Patching %r', self._path)
-        self._inf = open(self._path, 'r')
+        self._inf = open(self._path, 'r', encoding='utf8')
         self._outf = StringIO()
         return (self._inf, self._outf)
 
     def __exit__(self, et, ev, tb):
         if (et, ev, tb) == (None, None, None):
             self._inf.close()
-            with open(self._path, 'w') as f:
+            with open(self._path, 'w', encoding='utf8') as f:
                 f.write(self._outf.getvalue())