Python 2.7.5中的for循环

我是Python的新手，正在尝试编写一个脚本来为在多个位置运行的所有VMWare vCenter创建清单报告。该脚本基本上使用我的凭据在vCenter中创建会话ID，然后运行REST API调用以从vCenter获取所需信息。我可以为一个vCenter运行它，但是我想进行修改，使其应该一个一个地读取所有vCenter列表，并为每个vCenter执行所有REST API请求并生成输出，如下所示。你能帮忙吗？

输入文件格式：

vcenter1.abc.com
vcenter2.abc.com
vcenter3.xyz.com
vcenter4.xyz.com

我当前的一个vCenter脚本：

#!/usr/bin/python
import requests
import json

vcenter="vcenter1.abc.com"

sess = requests.post(
    "https://vcenter1.abc.com/rest/com/vmware/cis/session",
    auth=('vcusr_testapi@vsphere.local', 'xxxxxxx'),
    verify=False
)

session_id = sess.json()['value']

print 'vcenter,#datacenters,#clusters,#Hosts,#HostsConnected,#HostsDisconnected,#VMs,#PoweredOnVMs,#PoweredOffVMs'

resp = requests.get(
    "https://vcenter1.abc.com/rest/vcenter/datacenter",
    verify=False,
    headers={
        "vmware-api-session-id": session_id
     }
)

vc_response=json.loads(resp.text)
list_dc=vc_response["value"]
count_dc=len(list_dc)

resp = requests.get(
    "https://vcenter1.abc.com/rest/vcenter/cluster",
    verify=False,
    headers={
        "vmware-api-session-id": session_id
    }
)

vc_response=json.loads(resp.text)
list_cluster=vc_response["value"]
count_cluster=len(list_cluster)

resp = requests.get(
    "https://vcenter1.abc.com/rest/vcenter/host",
    verify=False,
    headers={
        "vmware-api-session-id": session_id
    }
)

host_response=json.loads(resp.text)
list_host=host_response["value"]
count_host=len(list_host)

resp = requests.get(
    "https://vcenter1.abc.com/rest/vcenter/host?filter.connection_states=CONNECTED",
    verify=False,
    headers={
        "vmware-api-session-id": session_id
    }
)

host_response=json.loads(resp.text)
list_host_connect=host_response["value"]
count_host_connect=len(list_host_connect)

resp = requests.get(
    "https://vcenter1.abc.com/rest/vcenter/host?filter.connection_states=DISCONNECTED",
    verify=False,
    headers={
        "vmware-api-session-id": session_id
    }
)

host_response=json.loads(resp.text)
list_host_disconnect=host_response["value"]
count_host_disconnect=len(list_host_disconnect)

resp = requests.get(
    "https://vcenter1.abc.com/rest/vcenter/vm",
    verify=False,
    headers={
        "vmware-api-session-id": session_id
    }
)

vc_response=json.loads(resp.text)
list_vm=vc_response["value"]
count_vm=len(list_vm)

resp = requests.get(
    "https://vcenter1.abc.com/rest/vcenter/vm?filter.power_states=POWERED_OFF",
    verify=False,
    headers={
        "vmware-api-session-id": session_id
    }
)

vc_response=json.loads(resp.text)
list_vm_on=vc_response["value"]
count_vm_on=len(list_vm_on)

resp = requests.get(
    "https://vcenter1.abc.com/rest/vcenter/vm?filter.power_states=POWERED_ON",
    verify=False,
    headers={
        "vmware-api-session-id": session_id
    }
)

vc_response=json.loads(resp.text)
list_vm_off=vc_response["value"]
count_vm_off=len(list_vm_off)

print vcenter,count_dc,count_cluster,count_host,count_host_connect,count_host_disconnect,count_vm,count_vm_on,count_vm_off

##print(vcenter, count_dc, sep=",")

当前脚本的输出：

vcenter,#datacenters,#clusters,#Hosts,#HostsConnected,#HostsDisconnected,#VMs,#PoweredOnVMs,#PoweredOffVMs
vcenter1.abc.com 5 6 16 14 2 389 140 249

我想以逗号分隔格式打印变量输出的输出，类似于输出文件中的标题行，请使用语法帮助我。

另外，需要修改脚本以使用for循环或任何其他机制为所有vCenter运行脚本。

我正在使用Python 2.7.5。