利用Python实现文件读取与输入以及数据存储与读取的常用命令

filename = 'C:\\Users\\yu\\Desktop\\number.txt'
 
with open(filename) as f:
    contents = f.read()
print(contents)

filename = 'C:\\Users\\yu\\Desktop\\number.txt'
 
with open(filename, 'a') as f:
    f.write("\n爬虫小迷弟写入数据")

import json
filename = 'C:\\Users\\yu\\Desktop\\data.txt'
number = [1, 2, 3, 4, 5, 6, 6]
with open(filename, 'r+') as f:
    json.dump(number, f)

import json
filename = 'C:\\Users\\yu\\Desktop\\data.txt'
number = []
with open(filename, 'r+') as f:
    number = json.load(f)
print(number)

#%%
for i in range(len(X_test)):
    with open("%d.txt"%(i),'w',encoding='utf-8') as f:       
        for j in X_test[i]:
           f.write(j,)

import os

path = "./testdata" #文件夹目录
files= os.listdir(path) #得到文件夹下的所有文件名称
x_test = []
for file in files: #遍历文件夹
    position = path+'\\'+ file #构造绝对路径，"\\"，其中一个'\'为转义符        
    with open(position, "r",encoding='utf-8') as f:    #打开文件
        data = f.read()   #读取文件
        x_test.append(data)