import  re
r=re.findall("[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+\.[a-zA-Z0-9_-]+","<>ksf_skfkdkfj@sfjlsf.com<")
print(r):\Users\zhaow\AppData\Local\Programs\Python\Python37\python.exe D:/study/python/atp/lib/t.py
['ksf_skfkdkfj@sfjlsf.com']

import  rer=re.findall("\d{17}[a-z1-9A-Z]","<ssf41060319890218456xdkjf")
print(r)/Library/Frameworks/Python.framework/Versions/3.7/bin/python3.7 /Users/dongyf/Documents/python/besttest_study/ryg.py
['41060319890218456x']

import  rer=re.findall("1[3,4,5,7,8,9]\d{9}","<ssf134567898769xdkjf")
print(r)/Library/Frameworks/Python.framework/Versions/3.7/bin/python3.7 /Users/dongyf/Documents/python/besttest_study/ryg.py
['13456789876']

import  rer=re.findall("\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}","<ssf134.234.21.2332xdkjf")
print(r)/Library/Frameworks/Python.framework/Versions/3.7/bin/python3.7 /Users/dongyf/Documents/python/besttest_study/ryg.py
['134.234.21.233']

处理多维数组：

def merge2(m):if isinstance(m, list):return ''.join(['%s' % d for i in m for d in merge2(i)])else:return ''.join(['%s' % m])或仅处理1维数组def store(m):if isinstance(m,list):return ''.join('%s'%i for i in m)else:return ''

import json
def load(a):try:return json.loads(a)except Exception as e:return ""
a='{"zhaozhao":{"price":"4.33","num":"5"}}'
print(load(a))

#数组转字符串
def store(a):s=''for j,i in enumerate(a,1):for index,key in enumerate(i,1):s=s+key+"="+i[key]if index<len(i): #最后一个元素无需加分号s=s+";"if j<len(a): #最后一个元素无需加换行符s=s+r"\n"return s
a=[{"k1":"value1"},{"k2":"value2"},{"k3":"value3","k4":"value4"}]
print(store(a))#字符串解析字典数组
def load(a):y=[]for i in a.split("\n"):x = {} #每次字典添加完成清空for j in i.split(";"):k,v=j.split("=") #元素分割后装入字典x[k]=vy.append(x) #字典装入完毕加入数组return ys="k1=value1\nk2=value2\nk3=value3;k4=value4"
print(load(s))