Python pandas read_csv .txt file in for loop returns none element

Question

I am trying to read from list.txt

Here is the code

import pandas as pd

df = pd.read_csv('sample.csv', skipinitialspace=True)
list= pd.read_csv('list.txt')
print (list)

for i in list:
    df1 = df.loc[(df['ID'] == i)]
    print ('-------------------------')
    print (df1)

It returns

  1
0  2
1  3
2  4
3  5
-------------------------
Empty DataFrame
Columns: [ID, 1st, 2nd, 3rd, 4th]
Index: []

Why is it returning ID column’s i value as none, and prints Empty Dataframe?

Asked By: Arif Test

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Source

Answer 1

The reason it is returning None is because you are iterating over a DataFrame in a wrong way.

Have a look at this:
pandas.DataFrame.iterrows

Answered By: Hardik Yagnik

Answer 2

you can convert the DataFrame values into List and then iterate through the values

df = pd.read_csv('sample.csv', skipinitialspace=True)
list = df.values.tolist()

for i in range(len(list)-1):   
print(list[i])

Answered By: Qadir Khan

Python pandas read_csv .txt file in for loop returns none element

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