导入ethjsonrpc时会引发如下错误：
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python3.6/site-packages/ethjsonrpc/__init__.py", line 1, in <module>
from ethjsonrpc.client import (EthJsonRpc, ParityEthJsonRpc,
File "/usr/local/lib/python3.6/site-packages/ethjsonrpc/client.py", line 7, in <module>
from ethereum import utils
File "/usr/local/lib/python3.6/site-packages/ethereum/utils.py", line 103, in <module>
assert sha3('').encode('hex') == 'c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470'
AttributeError: 'bytes' object has no attribute 'encode'
答案 0 :(得分：1)
这是<?php
namespace App\Nova\Lenses;
use Laravel\Nova\Fields\ID;
use Illuminate\Http\Request;
use Laravel\Nova\Fields\Text;
use Laravel\Nova\Lenses\Lens;
use Laravel\Nova\Fields\Number;
use Illuminate\Support\Facades\DB;
use Laravel\Nova\Http\Requests\LensRequest;
class MostValuableUsers extends Lens
{
/**
* Get the query builder / paginator for the lens.
*
* @param \Laravel\Nova\Http\Requests\LensRequest $request
* @param \Illuminate\Database\Eloquent\Builder $query
* @return mixed
*/
public static function query(LensRequest $request, $query)
{
return $request->withOrdering($request->withFilters(
$query->select($this->columns())
->join('licenses', 'users.id', '=', 'licenses.user_id')
->orderBy('revenue', 'desc')
->groupBy('users.id', 'users.name')
));
}
/**
* Get the columns that should be selected.
*
* @return array
*/
protected function columns()
{
return [
'users.id',
'users.name',
DB::raw('sum(licenses.price) as revenue'),
];
}
/**
* Get the fields available to the lens.
*
* @param \Illuminate\Http\Request $request
* @return array
*/
public function fields(Request $request)
{
return [
ID::make('ID', 'id'),
Text::make('Name', 'name'),
Number::make('Revenue', 'revenue', function ($value) {
return '$'.number_format($value, 2);
}),
];
}
/**
* Get the filters available for the lens.
*
* @param \Illuminate\Http\Request $request
* @return array
*/
public function filters(Request $request)
{
return [];
}
/**
* Get the URI key for the lens.
*
* @return string
*/
public function uriKey()
{
return 'most-profitable-users';
}
}
的问题，如github issue page所示。提议的解决方法是仅注释ethjsonrpc
最好改用python2来使用此模块，以防由于版本差异而导致出现更多错误。