Jupyter notebook 給了我正確代碼的錯誤

Question

我的 jupyter 筆記本對正確的代碼給出了錯誤。 具體來說這是我的錯誤： AttributeError: 'NoneType' object has no attribute 'plot'

我再次檢查，我已經重新編寫了我的代碼，我還逐個單元格地運行了我的代碼，並且還使用Run all 。 但不工作。 您的幫助將不勝感激。

這是我的代碼

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)

這是我的錯誤 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 也給出了錯誤。 這是我的 plot 的代碼

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")

這是我的 plot 錯誤 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'

這是我的 plot的屏幕截圖代碼和錯誤屏幕截圖代碼和錯誤屏幕截圖

Answer 1

您的堆棧跟蹤准確地指示了有問題的行：

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

顯然recent_grads是None ，因此您不能對其調用任何方法，包括count （以及您稍后嘗試調用的plot ）。

所以上一條指令中的read_csv可能有問題。 我想輸入文件存在，否則會更早拋出另一個異常。 也許這個文件是空的？