Ok I see. Actually can `client.env.EnvPut*` modify any of the settings after the library is loaded? I know in the past I had to change some env vars prior to first load.
Now the script
```py
from XRootD import client
import time
fs = client.FileSystem("localhost:9999")
tic = time.monotonic()
status, _ = fs.ping(1)
toc = time.monotonic()
print(f"Got status {status} in {toc-tic:.3f}s")
client.env.EnvPutInt("TimeoutResolution", 5)
tic = time.monotonic()
status, _ = fs.ping(1)
toc = time.monotonic()
print(f"Got status {status} in {toc-tic:.3f}s")
tic = time.monotonic()
status, _ = fs.ping(10)
toc = time.monotonic()
print(f"Got status {status} in {toc-tic:.3f}s")
```
returns
```
Got status [ERROR] Operation expired in 15.031s
Got status [ERROR] Operation expired in 15.050s
Got status [ERROR] Operation expired in 10.029s
```
so I'm not quite sure when it updates the var but it happens eventually
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