pandas histogram plot error: ValueError: num must be 1 <= num <= 0, not 1

问题

I am drawing a histogram of a column from pandas data frame:

%matplotlib notebook
import matplotlib.pyplot as plt
import matplotlib
df.hist(column='column_A', bins = 100)

but got the following errors:

     62                     raise ValueError(
     63                         "num must be 1 <= num <= {maxn}, not {num}".format(
---> 64                             maxn=rows*cols, num=num))
     65                 self._subplotspec = GridSpec(rows, cols)[int(num) - 1]
     66                 # num - 1 for converting from MATLAB to python indexing

ValueError: num must be 1 <= num <= 0, not 1

Does anyone know what this error mean? Thanks!

来源：https://stackoverflow.com/questions/39581525/pandas-histogram-plot-error-valueerror-num-must-be-1-num-0-not-1