python-文本操作和二进制储存

0x01 open方法

r read

w write

a append

b byte

test.txt内容为

yicunyiye

wutang

读取test.txt

f = open('test.txt','r',encoding='utf-8')
text = f.read()
print(text)

读取一行

f = open('test.txt','r',encoding='utf-8')
text = f.readline()
print(text)

全部

f = open('test.txt','r',encoding='utf-8')
text = f.readlines()
print(text)

输出

['yicunyiye\n', 'wutang\n']

美化

f = open('test.txt','r',encoding='utf-8')
text = f.readlines()
for t in text:
    print(t.strip().replace("\n",""))

输出

yicunyiye

wutang

f = open('test.txt','r',encoding='utf-8')
for i in range(3):
    text = f.readline()
    print(text.strip().replace("\n",""))

输出同上

0x02 with open as

这种就不需要f.close()了

with open('test.txt','r',encoding='utf8') as f:
    print(f.readlines())

写入文件

#w 不存在就创建 存在就覆盖
with open('test_two.txt','w',encoding='utf8') as f:
    f.write('yicunyiye')

追加文件

#a 不存在就创建 存在就追加
with open('test_two.txt','a',encoding='utf8') as f:
    f.write('\nniubi')