Domain name parse error: unexpected identifier

[rmalenko]

I have got this error full domain name au.edu in error message \\"au\\" i.e .edu is disappeared

File "./prometheus_query.py", line 35, in <module>
    metric_data = prom.custom_query(
  File "/usr/local/lib/python3.8/dist-packages/prometheus_api_client/prometheus_connect.py", line 355, in custom_query
    raise PrometheusApiClientException(
prometheus_api_client.exceptions.PrometheusApiClientException: HTTP Status Code 400 (b'{"status":"error","errorType":"bad_data","error":"invalid parameter \\"query\\": 1:70: parse error: unexpected identifier \\"aubg\\" in label matching, expected string"}')

my code is:

domain = "au.edu"

metric_data = prom.custom_query(
    query="avg_over_time(host_tracker_uptime_percent{job='donodeexporter', zone="f'{domain}'"}[30d])"
)
metric_df = MetricSnapshotDataFrame(metric_data)
print(metric_df.head())

If I provide domain name this code works

metric_data = prom.custom_query(
    query="avg_over_time(host_tracker_uptime_percent{job='donodeexporter', zone='au.edu'}[30d])"
)
metric_df = MetricSnapshotDataFrame(metric_data)
print(metric_df.head())

    instance             job                   zone     timestamp                                        value
0  prom.k.com  donodeexporter  au.edu 2022-11-03 11:44:08.178999808  99.921485