query = query.decode(errors='replace') AttributeError: 'str' object has no attribute 'decode'

django项目启动问题，报错如下

raceback (most recent call last):

  File "/usr/lib/python3.6/threading.py", line 916, in _bootstrap_inner

    self.run()

  File "/usr/lib/python3.6/threading.py", line 864, in run

    self._target(*self._args, **self._kwargs)

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/utils/autoreload.py", line 54, in wrapper

    fn(*args, **kwargs)

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 120, in inner_run

    self.check_migrations()

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/core/management/base.py", line 453, in check_migrations

    executor = MigrationExecutor(connections[DEFAULT_DB_ALIAS])

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/db/migrations/executor.py", line 18, in __init__

    self.loader = MigrationLoader(self.connection)

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/db/migrations/loader.py", line 49, in __init__

    self.build_graph()

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/db/migrations/loader.py", line 212, in build_graph

    self.applied_migrations = recorder.applied_migrations()

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 73, in applied_migrations

    if self.has_table():

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/db/migrations/recorder.py", line 56, in has_table

    return self.Migration._meta.db_table in self.connection.introspection.table_names(self.connection.cursor())

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 256, in cursor

    return self._cursor()

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 233, in _cursor

    self.ensure_connection()

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 217, in ensure_connection

    self.connect()

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 197, in connect

    self.init_connection_state()

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/db/backends/mysql/base.py", line 231, in init_connection_state

    if self.features.is_sql_auto_is_null_enabled:

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/utils/functional.py", line 80, in __get__

    res = instance.__dict__[self.name] = self.func(instance)

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/db/backends/mysql/features.py", line 82, in is_sql_auto_is_null_enabled

    cursor.execute('SELECT @@SQL_AUTO_IS_NULL')

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/db/backends/utils.py", line 103, in execute

    sql = self.db.ops.last_executed_query(self.cursor, sql, params)

  File "/home/zhangtq/.local/lib/python3.6/site-packages/django/db/backends/mysql/operations.py", line 146, in last_executed_query

    query = query.decode(errors='replace')

AttributeError: 'str' object has no attribute 'decode'

 解决方法

vi /home/zhangtq/.local/lib/python3.6/site-packages/django/db/backends/mysql/operations.py

将decode改为encode