Python：在 mongo 插入期间找不到导致 bson.errors.InvalidDocument 的 unicode 字段

Question

我使用pymongo在集合中插入一个复杂的结构作为行。该结构是字典列表等的字典列表的字典。

有没有办法找到导致错误的字段是unicode而不是str？我试过：

def dump(obj):
  with open('log', 'w') as flog:
    for attr in dir(obj):
      t, att = type(attr), getattr(obj, attr)
      output =  "obj.%s = %s" % (t, att)
      flog.write(output)

但到目前为止运气不佳。

有什么聪明的递归方式可以打印所有内容吗？

感谢

Answer 1

下面的内容帮助我找出了哪个dict包含unicode值，因为dict可以通过其键来识别。列表案例没有帮助。

def find_the_damn_unicode(obj):
    if isinstance(obj, unicode):
        ''' The following conversion probably doesn't do anything meaningfull since
            obj is probably a primitive type, thus passed by value. Thats why encoding
            is also performed inside the for loops below'''
        obj = obj.encode('utf-8')
        return obj
    if isinstance(obj, dict):
        for k, v in obj.items():
            if isinstance(v, unicode):
                print 'UNICODE value with key ', k
                obj[k] = obj[k].encode('utf-8')
            else:
                obj[k] = find_the_damn_unicode(v)
    if isinstance(obj, list):
        for i, v in enumerate(obj):
            if isinstance(v, unicode):
                print 'UNICODE inside a ... list'
                obj[i] = obj[i].encode('utf-8')
            else:
                obj[i] = find_the_damn_unicode(v)
    return obj