读取txt文件并存储在python数据帧中的代码。某些文件未被读取并给出NaN值

Question

从文件夹中读取txt文件时，某些文件返回NaN，而实际文件不是空的。 无法找出这些文件被忽略的原因

import pandas as pd
import os

def get_transcripts(file_path):
    try:
        with open(file_path, 'r') as t:
            text = t.read()
            return text
    except:
        print(file_path)


# parent directory path
path = 'D:\\Urja\\Data_Analytics_project\\NPR_Podcasts\\NPR_Podcasts\\'

# dataframe to load the transcripts
df = pd.DataFrame()

for podcast in os.listdir(path)[0:20]:  # gets transcripts for the first podcast
    podcast_name = podcast
    id = 1

    for episode in os.listdir(path + podcast + '/'):
        episode_name = episode.replace('.txt', '')
        transcript = get_transcripts(path + podcast + '/' + episode)

        temp = pd.DataFrame.from_dict({'id': [id],
                                       'podcast_name': [podcast_name],
                                       'episode_name': [episode_name],
                                       'transcript': [transcript]},
                                      orient='columns')
    
        df = pd.concat([df, temp], axis=0).reset_index(drop=True)
        id += 1

df