文件

 

f = open(r'F:文档珍爱网模版.txt', 'r')
print(f.read())
f.seek(0)  # .seek将光标移动到0位操作
f.close()  # .close关闭文件操作，不操作也可以，python有垃圾回收机制

 

f = open(r'F:文档珍爱网模版.txt', 'r')
print(f.read())
f.seek(0)  # .seek将光标移动到0位操作
print(f.read(4))
f.seek(0)
l = f.readlines()  # 读取所有的行到一个列表
print(l)
f.seek(0)
print(f.readline())  # 读取下一行
f.seek(0)
for line in l:
    print(line)
for line in f:
    print(line, end='')
f.close()  # .close关闭文件操作，不操作也可以，python有垃圾回收机制

f = open(r"f:文档珍爱网.txt", encoding='utf8')
print(f.read())
f.seek(0)
import os  # 操作系统功能模块

print(os.getcwd())  # 查看当前文件路径
os.chdir(r'f:文档')
print(os.getcwd())
f = open(r'珍爱网.txt', encoding='utf8')
print(f.read())

 

import os

os.getcwd()
os.chdir(r'f:文档')
print(os.getcwd())
coures = open('coures.txt', 'w', encoding='utf8')
coures.write("机构：腾讯课堂
")
coures.close()  # 加上.close操作才可以在文件里保存写入的内容
names = ['Tom', 'Jerry', 'Mike', 'Jack']
f = open('people.txt', 'w', encoding='utf8')
f.writelines(names)
f.flush()  # 将内存里缓存的内容直接映射在目标文件里
names = [name + '
' for name in names]
print(names)
f = open('people.txt', 'w', encoding='utf8')  # 'w'写操作会覆盖原有内容
f.writelines(names)
print(f.flush())
l = ['John
', 'Mary
']
f = open('people.txt', 'a', encoding='utf8')
f.writelines(l)
print(f.flush())
f.close()  # 日常写代码容易忘掉
with open('people.txt', 'r', encoding='utf8') as f:  # 用 with, as 围绕f变量设置个上下文以：缩进
    for line in f:
        print(line)
with open('test.txt', 'w', encoding='utf8') as f:
    f.write('Hello
')
    f.write('world
')
print(f)