ValueError: no enough values to unpack (expected 2, got 1) 错误

Question

代码1【输入文件】：

file = input("Email LIST : ")
in_emails = open(file,'r',errors='ignore').read().splitlines()
    
    domain_set = set()
    
    out_emails = []
    
    for email in in_emails:
        _, tmp = email.split("@", maxsplit=1)
        domain, _ = tmp.split(":", maxsplit=1)
        if domain not in domain_set:
            out_emails.append(email)
            domain_set.add(domain)
    
    print(out_emails)

代码 2（对于 Explane in_emails）：

in_emails = [
    "aazz@example1.com:584ZZ121",
    "bbssd@example1.com:8721ZZ2",
    "bbaz@example.com:872174s",
    "cc@bla.com:584SDZ21",
    "cc@bla.com:584SDZ21",
    "ccee@bla2.com:584SDZ21",
    ]

domain_set = set()

out_emails = []

for email in in_emails:
    _, tmp = email.split("@", maxsplit=1)
    domain, _ = tmp.split(":", maxsplit=1)
    if domain not in domain_set:
        out_emails.append(email)
        domain_set.add(domain)

print(out_emails)

如果“in_emails”中有错误行通过输入法[代码1]，我会收到以下错误：

_, tmp = email.split("@", maxsplit=1) ValueError: not enough values to unpack (expected 2, got 1) 

忽略错误行的任何解决方案？

Answer 1

您可以铺平任何出错的地方并像这样记录它：

for email in in_emails:

    try:
        _, tmp = email.split("@", maxsplit=1)
        domain, _ = tmp.split(":", maxsplit=1)
        if domain not in domain_set:
            out_emails.append(email)
            domain_set.add(domain)
    except Exception as err:
        print(f"Failed to parse email '{email}'", err)

Answer 2

确保没有将任何空字符串传递给 email。 如果 email 不包含@ ，则拆分将始终返回单个值。 而且您不能将单个值解压缩（或分配）到两个变量中。

_, tmp = "random@gmail.com".split("@", maxsplit=1)它有效。

_, tmp = "randomemail".split("@", maxsplit=1)会抛出错误。

有关拆分方法的更多信息，请参见此处： python-split