Created
March 26, 2021 14:10
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from concurrent.futures import ThreadPoolExecutor, ProcessPoolExecutor | |
import pandas as pd | |
from pathlib import Path | |
import sys | |
base_dir = sys.argv[1] | |
output_csv = sys.argv[2] | |
files = Path(base_dir).rglob('*.csv') | |
def read_file(file): | |
return pd.read_csv(file) | |
with ProcessPoolExecutor(12) as pool: | |
df = pd.concat(pool.map(read_file, files)) | |
df.to_csv(output_csv, index=False) |
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