Jupyter notebook 给了我正确代码的错误

Question

我的 jupyter 笔记本对正确的代码给出了错误。 具体来说这是我的错误： AttributeError: 'NoneType' object has no attribute 'plot'

我再次检查，我已经重新编写了我的代码，我还逐个单元格地运行了我的代码，并且还使用Run all 。 但不工作。 您的帮助将不胜感激。

这是我的代码

import pandas as pd
import matplotlib.pyplot as plt
%matplotlib inline

recent_grads = pd.read_csv("recent-grads.csv")
cleaned_data_count = recent_grads.count()
print (cleaned_data_count)

这是我的错误 output

AttributeError                            Traceback (most recent call last)
<ipython-input-6-e0fa232c36bf> in <module>
      1 # Look up the number of rows to ascertain if data has been droped
----> 2 cleaned_data_count = recent_grads.count()
      3 print (cleaned_data_count)

AttributeError: 'NoneType' object has no attribute 'count'

我的 plot 也给出了错误。 这是我的 plot 的代码

recent_grads.plot(x="Sample_size", y="Median", kind = "scatter", title = "Sample_size VS Median")
recent_grads.plot(x="Sample_size", y="Unemployment_rate", kind = "scatter", title = "Sample_size VS Uemployemny")
recent_grads.plot(x="Full_time", y="Median", kind = "scatter", title = "Full_time VS Median")
recent_grads.plot(x="ShareWomen", y="Unemployment_rate", kind = "scatter", title = "Sharewoman VS Unemployment_rate")
recent_grads.plot(x="Men",y="Median", kind = "scatter", title = "Men VS Median")
recent_grads.plot(x="Women",y="Median", kind = "scatter", title = "Sample_size VS Median")

这是我的 plot 错误 output

AttributeError                            Traceback (most recent call last)
<ipython-input-23-6d7d435b7c0f> in <module>
----> 1 recent_grads.plot(x="Sample_size", y="Median", kind = "scatter", title = "Sample_size VS Median")
      2 recent_grads.plot(x="Sample_size", y="Unemployment_rate", kind = "scatter", title = "Sample_size VS Uemployemny")
      3 recent_grads.plot(x="Full_time", y="Median", kind = "scatter", title = "Full_time VS Median")
      4 recent_grads.plot(x="ShareWomen", y="Unemployment_rate", kind = "scatter", title = "Sharewoman VS Unemployment_rate")
      5 recent_grads.plot(x="Men",y="Median", kind = "scatter", title = "Men VS Median")

AttributeError: 'NoneType' object has no attribute 'plot'

这是我的 plot的屏幕截图代码和错误屏幕截图代码和错误屏幕截图

Answer 1

您的堆栈跟踪准确地指示了有问题的行：

----> 2 cleaned_data_count = recent_grads.count()
...
AttributeError: 'NoneType' object has no attribute 'count'

显然recent_grads是None ，因此您不能对其调用任何方法，包括count （以及您稍后尝试调用的plot ）。

所以上一条指令中的read_csv可能有问题。 我想输入文件存在，否则会更早抛出另一个异常。 也许这个文件是空的？