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--- bash:output:troubleshooting:badly-written_commands [2021/01/26 15:17] – created peter
+++ bash:output:troubleshooting:badly-written_commands [2021/01/26 15:19] (current) – peter
@@ Line 1: / Line 1: @@
 ====== BASH - Output - Troubleshooting - Badly-written commands ======
+Some commands are not well-written, however, and may write information to the wrong place.
+You must keep an eye out for such commands, and work around them when necessary.
+For example:
+<code bash>
+vers=$(python --version)
+Python 2.7.13
+echo "{$vers}"
+{}
+</code>
+<WRAP info>
+**NOTE:**  Even though we specifically asked for the version number, python wrote it to stderr.
+Thus, it appeared on the terminal, and was not captured in the vers variable.
+To fix, you would need to use **2>&1** here.
+</WRAP>