[Solved] TypeError: ‘generator’ object has no attribute ‘__getitem__’

I have written a generating function that should return a dictionary. however when I try to print a field I get the following error

print row2['SearchDate']
TypeError: 'generator' object has no attribute '__getitem__'

This is my code

from csv import DictReader
import pandas as pd
import numpy as np

def genSearch(SearchInfo):
    for row2 in DictReader(open(SearchInfo)):
        yield row2

train = 'minitrain.csv'

SearchInfo = 'SearchInfo.csv'

row2 = {'SearchID': -1}

for row1 in DictReader(open(train)):
    if 'SearchID' in row1 and 'SearchID' in row2 and row1['SearchID'] == row2['SearchID']:
        x = deepcopy( row1 )
        #x['SearchDate'] = row2['percent']
        print 'new'
        print x
        #call your generator
        row2 = genSearch(SearchInfo)
        print row2['SearchDate']
Enquirer: MAS


Solution #1:

Generator returns an iterator, you explicitly needs to call next on it.

Your last line of code should be something like –

rows_generator = genSearch(SearchInfo)
row2 = next(rows_generator, None)
print row2['SearchDate']

Ideally, we use iterators in a loop, which automatically does the same for us.

Respondent: hspandher

Solution #2:

Generators are necessarily iterators , not iterables. Iterables contain
__item__() and __getitem__() methods, whilst iterators contain next() / __next__() method (python version 2.x/3.x).

Respondent: Reza Saidafkan

The answers/resolutions are collected from stackoverflow, are licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0 .

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