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va-project/backend/api/companies.py

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Python

import os
import pandas as pd
import numpy as np
from scraper.top100_extractor import programming_crime_list
COMPANIES_CSV_PATH: str = 'scraper/companies.csv'
def non_nan(a: list[any]) -> list[any]:
return list(filter(lambda a: type(a) == str or not np.isnan(a), a))
def get_companies(root_dir: str) -> list[dict]:
"""
reads the companies.csv file and returns it as a JSON-ifiable object
to return to the frontend.
"""
df = pd.read_csv(os.path.join(root_dir, COMPANIES_CSV_PATH), index_col='ticker')
tickers = pd.Series(programming_crime_list)
df = df.loc[df.index.isin(tickers), :]
df['tags'] = df[['tag 1', 'tag 2', 'tag 3']].values.tolist()
df['tags'] = df['tags'].apply(non_nan)
del df['tag 1']
del df['tag 2']
del df['tag 3']
return df.reset_index().replace({ np.nan: None }).to_dict('records')