添加到 DataFrame 时无法连接对象

Question

我正在尝试向 DataFrame 添加一个句子和一枚硬币（我猜在本例中就像一个标签）。虽然我不断收到此错误：

Traceback (most recent call last):
      File "c:\Users\gjohn\Documents\code\machineLearning\trading_bot\filter.py", line 132, in <module>
        df = df.append({'coin': coin, 'review': sentence}, ignore_index=True)
      File "C:\Users\gjohn\AppData\Local\Programs\Python\Python39\lib\site-packages\pandas\core\series.py", line 2877, in append
        return concat(
      File "C:\Users\gjohn\AppData\Local\Programs\Python\Python39\lib\site-packages\pandas\util\_decorators.py", line 311, in wrapper
        return func(*args, **kwargs)
      File "C:\Users\gjohn\AppData\Local\Programs\Python\Python39\lib\site-packages\pandas\core\reshape\concat.py", line 294, in concat
        op = _Concatenator(
      File "C:\Users\gjohn\AppData\Local\Programs\Python\Python39\lib\site-packages\pandas\core\reshape\concat.py", line 384, in __init__
        raise TypeError(msg)
 TypeError: cannot concatenate object of type '<class 'dict'>'; only Series and DataFrame objs are valid

这是代码：

data = pd.read_csv('C:\\Users\\gjohn\\Documents\\code\\machineLearning\\trading_bot\\testreviews.csv')
df = data['review'] # Create a dataframe of the reviews.
classes = data['class'] # Create a dataframe of the classes.
for sentence in sentences:
    coin = find_coin(common_words, sentence)
    if len(sentence) > 0 and coin != None:
        df = df.append({'coin': coin, 'review': sentence}, ignore_index=True)

我找不到如何解决此问题并且我确实需要帮助，但如果您能帮助我，那就太好了。谢谢！

也对混乱的代码表示歉意：D

Answer 1

您用来构造字典的句子是什么？

也许您应该检查字典是否构建正确？