我想要做的是打印区块链中的硬币总数。
我正在使用Chainscan manual
中的示例到目前为止,这是我的代码:
from chainscan import iter_blocks
total_btc = 0
for block in iter_blocks(show_progressbar = True):
coinbase_tx = next(iter(block.txs)) # the first tx is coinbase
total_btc += coinbase_tx.get_total_output_value()
print('Total %d satoshis (up to block height %d)' % (total_btc, block.height))
问题是我收到了UnsupportedOperation错误。这是追溯:
UnsupportedOperation Traceback (most recent call last)
<ipython-input-3-2b54aca19755> in <module>()
1 total_btc = 0
----> 2 for block in iter_blocks(show_progressbar = True):
3 coinbase_tx = next(iter(block.txs)) # the first tx is coinbase
4 total_btc += coinbase_tx.get_total_output_value()
5 print('Total %d satoshis (up to block height %d)' % (total_btc, block.height))
/usr/local/lib/python3.5/dist-packages/chainscan/utils.py in iter_blocks(block_iter, **kwargs)
23 """
24 if block_iter is None:
---> 25 block_iter = LongestChainBlockIterator(**kwargs)
26 return block_iter
27
/usr/local/lib/python3.5/dist-packages/chainscan/scan.py in __init__(self, block_iter, height_safety_margin, block_filter, **kwargs)
322 """
323 if block_iter is None:
--> 324 block_iter = TopologicalBlockIterator(**kwargs)
325 self.block_iter = block_iter
326 if height_safety_margin is None:
/usr/local/lib/python3.5/dist-packages/chainscan/scan.py in __init__(self, rawfile_block_iter, **kwargs)
230 """
231 if rawfile_block_iter is None:
--> 232 rawfile_block_iter = RawFileBlockIterator(**kwargs)
233 self.rawfile_block_iter = rawfile_block_iter
234
/usr/local/lib/python3.5/dist-packages/chainscan/scan.py in __init__(self, raw_data_iter, **kwargs)
155 """
156 if raw_data_iter is None:
--> 157 raw_data_iter = RawDataIterator(**kwargs)
158 self.raw_data_iter = raw_data_iter
159
/usr/local/lib/python3.5/dist-packages/chainscan/rawfiles.py in __init__(self, raw_files_iter, use_mmap, **kwargs)
115 """
116 if raw_files_iter is None:
--> 117 raw_files_iter = RawFilesIterator(**kwargs)
118 self.raw_files_iter = raw_files_iter
119 self.use_mmap = use_mmap
.
/usr/local/lib/python3.5/dist-packages/click/utils.py in echo(message, file, nl, err, color)
257
258 if message:
--> 259 file.write(message)
260 file.flush()
261
UnsupportedOperation: not writable
有什么想法吗?
提前致谢。