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3. Bitcoin Core/daemonCommands.py

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+import os
+import subprocess
+import time
+import re
+
+os.system(r"bitcoind -daemon")
+time.sleep(9)
+
+cmd = ['bitcoin-cli', 'getblockchaininfo']
+proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
+output = proc.communicate()[0].decode('ascii') # all blockchaininfo as a string
+
+os.system(r"bitcoin-cli stop")
+
+
+try:
+    blocks = re.search('"blocks": (.+?),\n', output).group(1)
+except AttributeError:
+    # not found in the output
+    blocks = 'not found any blocks' # apply your error handling
+
+try:
+    diff = re.search('"difficulty": (.+?),\n', output).group(1)
+except AttributeError:
+    # not found in the output
+    diff = 'not found any difficulty' # apply your error handling
+
+
+
+print("blobks:",blocks)
+print("difficulty:",diff)