请耐心等待我，我还是新手编程，所以我试图读取文件并将一些文本存储到变量中，这是我的代码：
fo=open(vpn_account)
for line in fo:
if line.find('remote')==0:
vpn=line.split()
if len(vpn) > 1:
servervpn=vpn[1] + ":" + vpn[2]
hostvpn=vpn[1]
portvpn=vpn[2]
print servervpn
fo.close()
当它读取下面的文件时会返回49.213.16.5:443，这就是我想要的。
dev tun
proto tcp
remote 49.213.16.5 443
http-proxy-retry
http-proxy 49.213.16.5 8080
keepalive 4 30
cipher AES-128-CBC
auth SHA1
resolv-retry infinite
nobind
persist-key
persist-tun
client
verb 3
auth-user-pass user.txt
route 0.0.0.0 0.0.0.0 vpn_gateway
route 0.0.0.0 0.0.0.0 net_gateway
route-method exe
route-delay 2
pull
mute-replay-warnings
tun-mtu 1500
mssfix 1430
redirect-gateway def1
dhcp-option DNS 8.8.8.8
dhcp-option DNS 8.8.4.4
<ca>
-----BEGIN CERTIFICATE-----
MIIDzjCCAragAwIBAgIBADANBgkqhkiG9w0BAQsFADBmMRYwFAYDVQQDDA1ERUxU
QSBTU0ggVlBOMRcwFQYDVQQKDA5ERUxUQSBDT01QVVRFUjELMAkGA1UEBhMCSUQx
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BQADggEPADCCAQoCggEBANoYM2+r1IaiDoBmZbylWpfKz/XEFmiEH0oLBl7EzFB6
rtaz9XjbkU6TyFQcnL3AWHKbkP7Gs7oJKwAexb5mQ3jVEIU+krQ4yl89wE86DleU
Kd1ez76XjbYzMMRFukJC/EiGJXfQAvctgFIRUKbruppbFMjbSGFovfPzll0RSdvM
2o6nY7VrtYp5YhA/H06Modum/bt8ScKYBS0Di00s+5AV+X2kFVvJzsCDHmXMDhfz
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tMrFPVOr6ZPhOuxQIKRSnPfc
-----END CERTIFICATE-----
</ca>
<cert>
-----BEGIN CERTIFICATE-----
MIID0DCCArigAwIBAgIBADANBgkqhkiG9w0BAQsFADBnMRwwGgYDVQQDDBMzMjE3
MTY0MzQ0MjMzODgwMjUxMRwwGgYDVQQKDBMzMjE3MTY0MzQ0MjMzODgwMjUxMRww
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EzMyMTcxNjQzNDQyMzM4ODAyNTExCzAJBgNVBAYTAlVTMIIBIjANBgkqhkiG9w0B
AQEFAAOCAQ8AMIIBCgKCAQEAyAApbf4Yn9eKyje5FcwdL+Qz2kxlXHOno1ZBMOIm
hbopcLvjBs8dpME9PaSsIeyC5hr6V3dCMwEUIsTa2G6mYl7aB2vGk08FtS9QfwXS
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QjFDajAw8jDxvjs2TQR9DXrXSKk=
-----END CERTIFICATE-----
</cert>
<key>
-----BEGIN RSA PRIVATE KEY-----
MIIEogIBAAKCAQEAyAApbf4Yn9eKyje5FcwdL+Qz2kxlXHOno1ZBMOImhbopcLvj
Bs8dpME9PaSsIeyC5hr6V3dCMwEUIsTa2G6mYl7aB2vGk08FtS9QfwXS9UOkP5/g
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konRU5LiDTsm7iLQjqacXe7GAisGAVQ7dz1LeTuUHHrdWhMJikk=
-----END RSA PRIVATE KEY-----
</key>
但是当脚本读取下面的文件时，我得到：
Traceback (most recent call last):
File "./test", line 12, in <module>
print servervpn
NameError: name 'servervpn' is not defined
这里是脚本有问题的文件：
client
dev tun
proto tcp
remtote 45.64.99.44 443
resolv-retry infinite
nobind
tun-mtu 1500
tun-mtu-extra 32
mssfix 1450
persist-key
persist-tun
auth-user-pass id2tcpvpncom443.txt
comp-lzo
reneg-sec 0
verb 3
<ca>
-----BEGIN CERTIFICATE-----
MIIE4jCCA8qgAwIBAgIJANc096jxw0XjMA0GCSqGSIb3DQEBCwUAMIGmMQswCQYD
VQQGEwJpZDELMAkGA1UECBMCaWQxEzARBgNVBAcTCnRjcHZwbi5jb20xEzARBgNV
BAoTCnRjcHZwbi5jb20xEzARBgNVBAsTCnRjcHZwbi5jb20xEzARBgNVBAMTCnRj
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Hg8EPpxH9H2B0PK3vui0gP36EJwCFgNSAsECAwEAAaOCAQ8wggELMB0GA1UdDgQW
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5Q93CX8++A+nfpMUVq2N3usgDg+xMqq9tYNUBgNFWAtmzzuAebgGa0qe7c2d+Qyr
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hqWapVxuLMxTUqCrMEtyq3BfO4i+YjbC/57TYRDAJq8AlKeDhScIiRaHKSMo8bl5
khmMCQgndaYkqGk80hJTcK5acH39K4l86Lslsj4rbmCTv8hWeQ09HPmreq/3UECC
OYHQg1bq
-----END CERTIFICATE-----
</ca>
<cert>
-----BEGIN CERTIFICATE-----
MIIFQjCCBCqgAwIBAgIBATANBgkqhkiG9w0BAQsFADCBpjELMAkGA1UEBhMCaWQx
CzAJBgNVBAgTAmlkMRMwEQYDVQQHEwp0Y3B2cG4uY29tMRMwEQYDVQQKEwp0Y3B2
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rZuUm+DSFnMqF3L74FTQMZ+LAUN5xGC4j/gtzT70nlW4eB4qWF4XFgLIok7pMt//
3xnxgw7n
-----END CERTIFICATE-----
</cert>
<key>
-----BEGIN PRIVATE KEY-----
MIIEvwIBADANBgkqhkiG9w0BAQEFAASCBKkwggSlAgEAAoIBAQDAsP9pWJBf9Jl8
A1+rRD1LyaR8J4t8VhzzhVKUpbKLanov1ymfCYH4OevWAW/uuoKt5hlg55TEPKPT
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k+iIuH6zfsYWjL2hoSkG1OTvJA==
-----END PRIVATE KEY-----
</key>
我真的不知道脚本有什么问题，我该如何解决？
答案 0 :(得分：0)
您的文件中有remtote而不是remote：没有符合匹配项（if line.find('remote')==0:永远不会True）：servervpn永远不会被定义，因为你甚至没有进入if条件
您必须使代码对错误更加健壮
with open(vpn_account) as fo:
for line in fo:
if line.find('remote')==0:
vpn=line.split()
if len(vpn) > 2:
servervpn=vpn[1] + ":" + vpn[2]
hostvpn=vpn[1]
portvpn=vpn[2]
break # no need to continue reading the file: we found the pattern
else:
raise Exception("no remote line found")
else条件与for循环相关。如果没有break，则执行else代码，并引发显式异常。
答案 1 :(得分：0)
根据您的代码逻辑，您逐行读取文本文件并搜索以remote开头的行，如果找到，那么您正在初始化一个局部变量servervpn，该变量将在for循环
请注意servervpn是在if条件内创建的局部变量，因此如果不满足if条件（如第二个文本文件中那样没有行开头）使用remote），然后变量不会被创建，从而导致错误。