robertwb commented on code in PR #17366:
URL: https://github.com/apache/beam/pull/17366#discussion_r850718537
##########
sdks/java/extensions/python/src/main/java/org/apache/beam/sdk/extensions/python/PythonService.java:
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@@ -96,6 +95,18 @@ public AutoCloseable start() throws IOException,
InterruptedException {
return p::destroy;
}
+ private String whichPython() {
+ for (String executable : ImmutableList.of("python3", "python")) {
+ try {
+ new ProcessBuilder(executable, "--version").start().waitFor();
+ return executable;
+ } catch (IOException | InterruptedException exn) {
+ // Ignore.
Review Comment:
It will move on to the next item in the list above, trying to find some
python in the path. In this case, first we're trying python3, and if that fails
we try plain old python, and if that fails we give up (though we could add
other items in this list as needed).
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