如何在某些条件下使用python3读取列表？

Question

How to read list with some conditions using python3?

By default i want to check the first list with date condition and second as alpha numberic condition and rest all list as numbers conditions. Is it easy to check the condition in nested list or dictionary ??? import re

  list_1=[["01/01/2019","02/02/2019"],["abc012","def345"],["1","2"],["2.50","3.15"],["4.50","5.55"]]

 for i,string in enumerate(list_1):
     for j in string:
          if re.findall(r"\d{1,2}/\d{1,2}/\d{4}", j):
             print(j,"first")
     for k in string:
          if re.findall(r"[a-zA-Z0-9]", k):
             print(k,"second")
    for l in string:
          if re.findall(r"[0-9]", l):
           print(l,"third")

Expected Output:

01/01/2019,first
02/02/2019,first
abc012 second
def345 second
1 third
2 third
2.50 third
3.15 third
4.50 third
5.55 third

Answer 1

Yes, you can do this as bellow:

for i,string in enumerate(list_1):
    if i == 0 :
       for j in string:
          if re.findall(r"\d{1,2}/\d{1,2}/\d{4}", j):
             print(j,"first")
    elif i == 1:
       for k in string:
          if re.findall(r"[a-zA-Z0-9]", k):
             print(k,"second")
    else:
       for l in string:
          if re.findall(r"[0-9]", l):
             print(l,"third")