使用python中出现的错误统计

1， unsupported operand type(s) for /: 'map' and 'int'

机器学习实战 PCA程序

Traceback (most recent call last):

  File "<ipython-input-29-808c65c1265e>", line 1, in <module>
    lowDMat,reconMat=pca.pca(dataMat,1)

  File "I:pythonPCApca.py", line 15, in pca
    meanVals = mean(dataMat, axis=0)

解决办法：

2 ，TypeError: ufunc 'isnan' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''

Traceback (most recent call last):

  File "<ipython-input-17-945c872e5152>", line 1, in <module>
    dataMat=pca.replaceNanWithMean()

  File "I:pythonPCApca.py", line 59, in replaceNanWithMean
    meanVal = mean(datMat[nonzero(~isnan(datMat[:,i].A))[0],i])

TypeError: ufunc 'isnan' not supported for the input types, and the inputs could not be 
safely coerced to any supported types according to the casting rule ''safe''