如何在python代码中设置环境变量
如何在python代码中设置环境变量
提问于 2018-08-07 03:32:53
我最近开始用python编写代码。我正在尝试创建一个环境变量，并使用python将列表分配给它。因此，当我尝试通过命令行(如printenv )读取我的环境变量时，它将在那里列出。
这是我用编写的代码：
from API_CALLS import Post_Request as Request
import os
class VTM_Config:
@staticmethod
def validate_pool_nodes(url, headers, expected_num_of_active_nodes):
try:
print('\nNow Executing Validate VTM Configs...\n')
# validate that vtm api works by sending a get_session_with_ssl call to the url
vtm_get_session_response = Request.get_session_with_ssl(url=url, headers=headers)
data = vtm_get_session_response
active_nodes = [
n['node']
for n in data['properties']['basic']['nodes_table']
if n['state'] == 'active'
]
actual_num_of_active_nodes = len(active_nodes)
if expected_num_of_active_nodes != actual_num_of_active_nodes:
print("Number of Active Nodes = {}".format(actual_num_of_active_nodes))
raise Exception("ERROR: You are expecting : {} nodes, but this pool contains {} nodes".format(
expected_num_of_active_nodes, actual_num_of_active_nodes))
else:
print("Number of Active Nodes = {}\n".format(actual_num_of_active_nodes))
print("Active servers : {}\n".format(active_nodes))
os.environ["ENABLED_POOL_NODES"] = active_nodes
return os.environ["ENABLED_POOL_NODES"]
except Exception as ex:
raise ex我正在尝试使用os.environ["ENABLED_POOL_NODES"] = active_nodes创建一个环境变量，并尝试返回它。
当我运行这段代码时，我得到如下错误: raise list (“type(value).name) expect，not %s%List TypeError: str expect，not list。
问:如何将list赋值给环境变量。
回答 1
Stack Overflow用户
发布于 2018-08-09 00:57:01
所以，这是一个简单的解决方案，感谢你们所有人。我最终只是返回字符串值并打印到控制台，在那里jenkins作业中的shell脚本将获得输出：
def validate_pool_nodes(url, headers, expected_num_of_active_nodes):
try:
print('\nNow Executing Validate VTM Configs...\n', file=sys.stderr)
# validate that vtm api works by sending a get_session_with_ssl call to the url
vtm_get_session_response = Request.get_session_with_ssl(url=url, headers=headers)
data = vtm_get_session_response
active_nodes = {
n['node']
for n in data['properties']['basic']['nodes_table']
if n['state'] == 'active'
}
actual_num_of_active_nodes = len(active_nodes)
if expected_num_of_active_nodes != actual_num_of_active_nodes:
print("Number of Active Nodes = {}".format(actual_num_of_active_nodes), file=sys.stderr)
raise Exception("ERROR: You are expecting : {} nodes, but this pool contains {} nodes".format(
expected_num_of_active_nodes, actual_num_of_active_nodes))
else:
print("Number of Active Nodes = {}\n".format(actual_num_of_active_nodes), file=sys.stderr)
return str(active_nodes)
except Exception as ex:
raise ex下面是python的"main“方法：
if __name__ == '__main__':
arg1 = sys.argv[1]
arg2 = int(sys.argv[2])
run_prereq = Prerequisites()
run_prereq.validate_login_redirect(pool_arg=arg1)
nodes_list = run_prereq.validate_pool_nodes(pool_arg=arg1, num__of_nodes_arg=arg2)
sys.stdout.write(nodes_list)
sys.exit(0)页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/51714499
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