“module”对象没有属性“isna”

Question

我有一个名为batch_df的df，我在df中添加了“as_percentage”。如果小时数为Nan，则设置为0。PyCharm中的代码运行良好，但当我在终端上运行时，出现了一个错误：请帮助！

Traceback (most recent call last):

File "/Users/vic_ong/dev/resource-management/generateBatch.py", line 166, in main()

File "/Users/vic_ong/dev/resource-management/generateBatch.py", line 51, in main

batch_df.loc[pd.isna(batch_df['hours']) == False, 'as_percentage'] = 0 AttributeError: 'module' object has no attribute 'isna'

编辑--我的代码如下所示：

#!/usr/bin/env python2
import lib
import pandas as pd
import datetime
import os
pd.set_option('expand_frame_repr', False)
# get directories
batchInputDir = '/Users/vic_ong/dev/resource-management/data/input/batchUpload'


def main():
# start timer
start_time = datetime.datetime.now()

# walk into every csv file in batchUpload and concatenate them into one df
list_ = []
for root, dirs, files in os.walk(batchInputDir):
    for file in files:
        if file.endswith('.csv'):
            df = pd.read_csv(os.path.join(batchInputDir, file), index_col=None, header=0)
            list_.append(df)
batch_df = pd.concat(list_)
batch_df = batch_df.dropna(how='all')
batch_df.reset_index(drop=True, inplace=True)
# clean data frame
# rename to standardized column names
batch_df.rename(columns={'Resource Name': 'name',
                         'Hours': 'hours'},
                inplace=True)
# determine if value given was a percentage
batch_df['as_percentage'] = 1
batch_df.loc[pd.isna(batch_df['hours']) == False, 'as_percentage'] = 0
print batch_df.head

if __name__ == '__main__':
main()

批量样品：

name hours as_percentage vic Nan 1 vic1 Nan 1

Answer 1

pandas.isna = pandas.isnull这是我的权宜之计吗

Answer 2

The ^{} alias for ^{} was only added in version 0.21（0.22是截至2018年1月的最新版本）；在0.20和更早版本上，它不存在；您必须使用旧的（并且仍然受支持的）名称isnull。请更新您的pandas安装，或使用旧名称。