python 文件读写方式

with open(‘/path/to/file‘, ‘r‘) as f:
    content = f.read()

with open(‘/Users/michael/test.txt‘, ‘w‘) as f:
    f.write(‘Hello, world!‘)

>>> f = open(‘/Users/michael/test.jpg‘, ‘rb‘)
>>> f.read()
‘\xff\xd8\xff\xe1\x00\x18Exif\x00\x00...‘ # 十六进制表示的字节

>>> f = open(‘/Users/michael/gbk.txt‘, ‘rb‘)
>>> u = f.read().decode(‘gbk‘)
>>> u
u‘\u6d4b\u8bd5‘

import codecs
with codecs.open(‘/Users/michael/gbk.txt‘, ‘r‘, ‘gbk‘) as f:
    f.read() # u‘\u6d4b\u8bd5‘

model={...} #数据
with open("./hmm.json",‘w‘,encoding=‘utf-8‘) as json_file:
        json.dump(model,json_file,ensure_ascii=False)

model={} #存放读取的数据
with open("./hmm.json",‘r‘,encoding=‘utf-8‘) as json_file:
        model=json.load(json_file)