Question

如何使用python3在某些条件下读取列表？

默认情况下，我想检查第一个具有日期条件的列表，第二个作为字母数字条件，其余所有列表都作为数字条件。在嵌套列表或字典中检查条件是否容易？汇入

  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")

预期输出：

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

是的，您可以像下面这样：

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")

如何在某些条件下使用python3读取列表？

1 个答案: