【HowToPython】「CSV」ファイルをPythonで読み込み, 「LIST」として格納する方法

「CSV」ファイルをPythonで読み込み, 「LIST」として格納する方法についての記事となっております。

データ構造

### Data Structure

### - SAMPLE
###    - sample.csv
### - sample.py

実行ファイルの内容

one,two,three
four,five,six
seven,eight,nine

import csv

def option_001(filePath):

    file_IO = open(filePath)
    info_STR = file_IO.read()
    
    row_LIST = info_STR.split("\n")

		### print(row_LIST )
		### ['one,two,three', 'four,five,six', 'seven,eight,nine']

    data_LIST = [row_STR.split(",") for row_STR in row_LIST]

		### print(data_LIST)
		### [['one', 'two', 'three'], ['four', 'five', 'six'], ['seven', 'eight', 'nine']]
    
    file_IO.close()
    
    return data_LIST

def option_002(filePath):

    with open(filePath) as file_IO:
        info_STR = file_IO.read()
        
    row_LIST = info_STR.split("\n")

		### print(row_LIST )
		### ['one,two,three', 'four,five,six', 'seven,eight,nine']

    data_LIST = [row_STR.split(",") for row_STR in row_LIST]

		### print(data_LIST)
		### [['one', 'two', 'three'], ['four', 'five', 'six'], ['seven', 'eight', 'nine']]
    
    return data_LIST

def option_003(filePath):

    with open(filePath) as file_IO:
        info_CSV = csv.reader(file_IO)
        data_LIST = [val for val in info_CSV]
    
		### print(data_LIST)
		### [['one', 'two', 'three'], ['four', 'five', 'six'], ['seven', 'eight', 'nine']]

    return data_LIST

### INPUT: File Path (str)
### OUTPUT: File Information (list)

FILE_PATH = "SAMPLE/sample.csv"
print(option_001(FILE_PATH))
### print(option_002(FILE_PATH))
### print(option_003(FILE_PATH))