python数据处理常用方法（二）

6、正则取出固定位置的字符

template = "DF','17340','http://www.zgglkx.com','2021','205')"
res = re.findall(r"DF','(.*?)',",template)[0]
print(res)

结果：

17340
Process finished with exit code 0

7、正则匹配判断字符串中是否含有中文

import re
Pattern = re.compile(u'[\u4e00-\u9fa5]+')
key='[25] 张初兵,荣喜民.仿射利率模型下确定缴费型养老金的最优投资[J]. 系统工程理论与实践,2012,32(5):1048-1056. Zhang Chubing, Rong Ximin. Optimal investment for DC pension under the affineinterest rate model[J]. Systems Engineering-Theory & Practice, 2012, 32(5):1048-1056.'
match = Pattern.search(key)
if match:
    print("存在中文")

8、list添加删除连接元素

在最后添加元素

list.append()

    1

从最后删除元素

a = list.pop()

    1

用#连接列表的元素

'#'.join(list[3:5])

    1

9、函数变量声明

def sum(*args):
    a,b,c=args
    d = a+b+c
    print({f"The sum is {d}.")

    1
    2
    3
    4

输入：

sum(1,2,3)

    1

输出：

The sum is 6.

10、input对话框获取实时输入

age = input("how old qre you: ")
print("I am ",age,"years old")

how old are you: 2
I am  2 years old
Process finished with exit code 0