How to read and write txt files line by line in python

This time I will bring you pythonHow to read and write txt files line by line, what are the precautions for reading and writing txt files line by line in python, the following is a practical case, let's come together take a look.

The example is as follows:

# -*-coding:utf-8-*-
import os
file_obj = open("test2.txt")
all_lines = file_obj.readlines()
for line in all_lines:
  print line
file_obj.close()
# 写之前，先检验文件是否存在，存在就删掉
if os.path.exists("dest.txt"):
  os.remove("dest.txt")
mylist = ["luoluo", "taotao", "mumu"]
# 以写的方式打开文件，如果文件不存在，就会自动创建
file_write_obj = open("dest.txt", 'w')
for var in mylist:
  file_write_obj.writelines(var)
  file_write_obj.write('\n')
file_write_obj.close()

w Open in write mode,

a Open in append mode

r Open in read-write mode

w Open in read-write mode

a Open in read-write mode

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

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