Python基本语法

列表遍历

[i for i in ll]

for i in ll:
     print i

Json

 

import json
## Python数据类型to JSON

j = json.dumps(dict)

## Json字符串 to Python数据类型
dict = json.loads(s=j)
## 再转成对象
    stu = Student()
    stu.__dict__ = dict

  

 

字典遍历

for i in d:
 t = i + d[i]
 
for k,v in d.items():
 t = k + v

 


时间

t = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')


now = datetime.datetime.now()
delta = datetime.timedelta(days=3)
n_days = now + delta
print n_days.strftime('%Y-%m-%d %H:%M:%S') 

 

文件操作

with open(fileOnline) as f:
    for line in f:
        print ("line:{}".format(line.strip("\n")))