如何读取从os.listdir获取的文件的内容？ [重复]

Question

这个问题在这里已有答案：

• Python giving FileNotFoundError for file name returned by os.listdir 2回答

我正在尝试读取CSV文件。我在两个文件夹下有两个CSV。我得到了CSV文件但是当我尝试阅读内容时，它说我没有这样的文件或目录。

import os
import csv

def scanCSVFile(folder, output_file_name):
    myfile = open(output_file_name, "a")
    files = os.listdir(folder)
    for file in files:
        if file.endswith('.csv'): #gives two csv files
            with open(file) as csvfile: 
                csvreader = csv.reader(csvfile)
                next(csvreader)
                for line in csvreader:
                    print (line)

    myfile.close()


def openCSV(path):
    scanCSVFile("./src/goi","goi.yml")
    scanCSVFile("./src/kanji","kanji.yml")

openCSV('.')

错误：

C:\Users\Peace\Documents\LMS>python csvToYaml.py 
Traceback (most recent call last): 
File "csvToYaml.py", line 26, in <module> openCSV('.') 
File "csvToYaml.py", line 24, in openCSV scanCSVFile("./src/goi","goi.yml") 
File "csvToYaml.py", line 14, in scanCSVFile with open(file) as csvfile:  
FileNotFoundError: [Errno 2] No such file or directory: 'Pro.csv'

Answer 1

你必须从代码中删除break

import os,glob

folder_path = r'path'

for filename in glob.glob(os.path.join(folder_path, '*.csv')):
    with open(filename, 'r') as f:
        for line in f:
            print(line)

Answer 2

您可以使用pandas从csv文件中读取数据.Data将存储在数据帧中。 “.yml”扩展现在已经过时了。大多使用“.yaml”。以下链接显示了如何阅读.yaml文件。 How can I parse a YAML file in Python

# loading libraries and reading the data from csv files.
import pandas as pd
market_df = pd.read_csv("./src/goi.csv")
print(market_df)