我尝试在python中使用resample方法，但收到以下错误：

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NameError Traceback (most recent call last)
<ipython-input-22-9ff5896e97a3> in <module>
----> 1 df_no_default_downsampled=resample(df_no_deafult,replace=False,n_samples=1000,random_state=42)
      2 df_default_downsampled=resample(df_deafult,replace=False,n_samples=1000,random_state=42)

NameError: name 'resample' is not defined