文件的基本操作

f = open(‘01.txt‘,mode=‘a‘)
f.write("\nhelloworld\n")

import time
def get_time():
    return time.strftime(‘%Y_%m_%d-%H_%M‘)

# TODO 创建一个文件，文件名为当前日期，文件后缀名为 .txt, 文件中写入10行内容。
file_name = get_time()
file_name = file_name+‘.txt‘
f = open(file_name,mode=‘a‘)
for i in range(10):
    f.write(f‘{i+1}\thelloworld\n‘)

f = open(‘./2020_08_25-11_58.txt‘)
# print(f.read())  
# print(f.readline())
# print(f.readline())
print(f.readlines())   # [‘1\thelloworld\n‘, ‘2\thelloworld\n‘, ‘3\thelloworld\n‘, ‘4\thelloworld\n‘, ‘5\thelloworld\n‘, ‘6\thelloworld\n‘, ‘7\thelloworld\n‘, ‘8\thelloworld\n‘, ‘9\thelloworld\n‘, ‘10\thelloworld\n‘]

print(__file__) #    C:\Users\zengy\PycharmProjects\untitled2\demo.py

import os
print(os.path.dirname(__file__))
print(os.path.dirname(os.path.dirname(__file__)) )
base_dir = os.path.dirname(__file__)
print(base_dir)

C:\Users\zengy\PycharmProjects\untitled2
C:\Users\zengy\PycharmProjects
C:\Users\zengy\PycharmProjects\untitled2

logs_path=os.path.join(base_dir,‘logs‘)
print(logs_path)

print(os.path.exists(logs_path))  # False

if not os.path.exists(logs_path):
    os.mkdir(logs_path)

import os
import time
# 1 创建目录
log_dir=os.path.join(os.path.dirname(__file__),‘../logs‘)
if not os.path.exists(log_dir):
    os.mkdir(log_dir)

# 2 确定文件路径
filename = time.strftime(‘%Y_%m_%d-%H_%M_%S‘)
filepath = os.path.join(log_dir,filename+‘.log‘)
# encoding=‘utf8‘ 设置文件编码
f = open(filepath,mode=‘a‘,encoding=‘utf8‘)
for i in range(10):
    f.write(f‘{i+1} \t 凡猫教育\n‘)
f.close()