AttributeError: 'DataFrame' object has no attribute

问题

I keep getting different attribute errors when trying to run this file in ipython...beginner with pandas so maybe I'm missing something

Code:

from pandas import Series, DataFrame

import pandas as pd

import json

nan=float('NaN')
data = []
with open('file.json') as f:
for line in f:
    data.append(json.loads(line))

df = DataFrame(data, columns=['accepted', 'user', 'object', 'response'])
clean = df.replace('NULL', nan)
clean = clean.dropna()

print clean.value_counts() 

AttributeError: 'DataFrame' object has no attribute 'value_counts'

Any ideas?

回答1:

value_counts is a Series method rather than a DataFrame method (and you are trying to use it on a DataFrame, clean). You need to perform this on a specific column:

clean[column_name].value_counts()

It doesn't usually make sense to perform value_counts on a DataFrame, though I suppose you could apply it to every entry by flattening the underlying values array:

pd.value_counts(df.values.flatten())

回答2:

To get all the counts for all the columns in a dataframe, it's just df.count()

来源：https://stackoverflow.com/questions/19392226/attributeerror-dataframe-object-has-no-attribute