allcombo4.py

import csv
import os

# Function to extract the first column from a CSV file
def extract_first_column(csv_file):
    with open(csv_file, 'r') as file:
        reader = csv.reader(file)
        first_column = [int(row[0]) for row in reader]
    return first_column

# Directory containing combo CSV files
csv_directory = os.path.dirname(os.path.abspath(__file__))

# List to store the first columns from each CSV
all_first_columns = []

# Loop through each combo CSV file
for i in range(1, 7):  # Assuming combo files are named combo1.csv to combo6.csv
    csv_file_path = os.path.join(csv_directory, f'text4combo{i}.csv')
    first_column = extract_first_column(csv_file_path)
    all_first_columns.append(first_column)

# Transpose the list of lists to get a list of columns
all_first_columns_transposed = list(map(list, zip(*all_first_columns)))

# Save the transposed result into a new CSV file
output_csv_path = os.path.join(csv_directory, 'loopnum4.csv')
with open(output_csv_path, 'w', newline='') as csvfile:
    writer = csv.writer(csvfile)
    writer.writerows(all_first_columns_transposed)

print(f"Combined first columns saved to {output_csv_path}")