GoPubby - Write and Read a Dictionary into TXT file in Python

I've been exploring an elegant way of exporting/importing a dictionary into/from an external TXT file for recording purposes. Say I have a dictionary with stocks codes and prices, and the dictionary's name is called stocks, and this dictionary is stored in a py file called rank.py. The txt file I've like to export to is 'stocks.txt'. The relative path from the operating py file to the txt file is 'static/stocks.txt'. To export the dictionary from the py file into the txt file, this code will be neat:


from rank import stocks

with open('static/stocks.txt', 'w') as f:
    print(stocks, file=f)

To read the dictionary from the txt file, use this code:


with open('static/stocks.txt', 'r') as f:
    content = f.read() 
    stocks = eval(content)

When it comes to the operation in flask route functions, I found it worked totally different with regard to the file path of the txt file. An error of "no file/file directory" keeps blowing off the code. Eventually I figured out that the file path should be written in a different way with the following code:


import os
from flask import current_app

f_path = os.path.join(current_app.root_path, 'static/stocks.txt')
with open(f_path, 'r') as f:
    content = f.read() 
    stocks = eval(content)

What a tricky debugging issue!

Write and Read a Dictionary into TXT file in Python

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