Python输入与输出(文件读取、json格式转换）

name="小明"
name2="小k"
dic = {"name":"eson","age":90}
print('{1} is {0} ‘s sister'.format(name,name2))
print('my name is {name},i‘m {age} years old'.format(**dic))

name="ESON"
print(f'my name is {name.lower()}')

写法一：

file = open('venv/pyvenv.cfg','rt')
#print(file.read())
print(file.readline())
print(file.readable())
file.close()

写法二：

with open('venv/pyvenv.cfg','rt') as file:print(file.readlines())

# dump
import jsoninfo = [{"name": "eson","age": 18,"gender": "female"},{"name": "john""age": 20,"gender": "male"}
]
json.dump(info,open('datas/datas.json','w'))

# loads
import json
info = '''[{"name": "eson","age": "18","gender": "female"},{"name": "john","age": "20","gender": "male"}]
'''
print(type(info))
datas = json.loads(info)
print(datas)

import json
jsobj = json.load(open('datas/datas.json','r'))
print(jsobj[0]['name'])