robotframework 日志输出中出现中文乱码

在python安装目录下，在Lib/site-packages/robot/utils目录下的unic.py文件中，在下面两个位置，把“ASCII”改为“utf-8”

解决方法：
1、robotframework为3.0.X

2、找到python安装目录下的\Lib\site-packages\robot\utils\unic.py文件

3、引入json库：import json

文件代码全部拷贝出来如下：

    #  Copyright 2008-2015 Nokia Networks
    #  Copyright 2016-     Robot Framework Foundation
    #
    #  Licensed under the Apache License, Version 2.0 (the "License");
    #  you may not use this file except in compliance with the License.
    #  You may obtain a copy of the License at
    #
    #      http://www.apache.org/licenses/LICENSE-2.0
    #
    #  Unless required by applicable law or agreed to in writing, software
    #  distributed under the License is distributed on an "AS IS" BASIS,
    #  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    #  See the License for the specific language governing permissions and
    #  limitations under the License.
     
    from pprint import PrettyPrinter
     
    from .platform import IRONPYTHON, JYTHON, PY2
    from .robottypes import is_bytes, is_unicode
    import json
     
    if PY2:
     
        def unic(item):
            if isinstance(item, unicode):
                return item
            if isinstance(item, (bytes, bytearray)):
                try:
                    return item.decode('ASCII')
                except UnicodeError:
                    return u''.join(chr(b) if b < 128 else '\\x%x' % b
                                    for b in bytearray(item))
                                    
            if isinstance(item, (list, dict, tuple)):
                try:
                    item = json.dumps(item, ensure_ascii=False, encoding='utf-8')
                except UnicodeDecodeError:
                    try:
                        item = json.dumps(item, ensure_ascii=False, encoding='gbk')
                    except:
                        pass
                except:
                    pass
            try:
                try:
                    return unicode(item)
                except UnicodeError:
                    return unic(str(item))
            except:
                return _unrepresentable_object(item)
     
    else:
     
        def unic(item):
            if isinstance(item, str):
                return item
            if isinstance(item, (bytes, bytearray)):
                try:
                    return item.decode('ASCII')
                except UnicodeError:
                    return ''.join(chr(b) if b < 128 else '\\x%x' % b
                                   for b in item)
            try:
                return str(item)
            except:
                return _unrepresentable_object(item)
     
     
    # JVM and .NET seem to handle Unicode normalization automatically. Importing
    # unicodedata on Jython also takes some time so it's better to avoid it.
    if not (JYTHON or IRONPYTHON):
     
        from unicodedata import normalize
        _unic = unic
     
        def unic(item):
            return normalize('NFC', _unic(item))
     
     
    def prepr(item, width=400):
        return unic(PrettyRepr(width=width).pformat(item))
     
     
    class PrettyRepr(PrettyPrinter):
     
        def format(self, object, context, maxlevels, level):
            try:
                if is_unicode(object):
                    return repr(object).lstrip('u'), True, False
                if is_bytes(object):
                    return 'b' + repr(object).lstrip('b'), True, False
                return PrettyPrinter.format(self, object, context, maxlevels, level)
            except:
                return _unrepresentable_object(object), True, False
     
     
    def _unrepresentable_object(item):
        from .error import get_error_message
        return u"<Unrepresentable object %s. Error: %s>" \
               % (item.__class__.__name__, get_error_message())