fix(SU2_PY): improve Python wrapper reliability and remove invalid-escape warnings

SU2_PY/OptimalPropeller.py

@@ -344,29 +344,29 @@ def write_external_file(CTrs, CPrs):
 # Automatically plot the computed propeller performance.
 
 pl.figure(1)
-pl.plot(r, dCt_optimal, "r", markersize=4, label="$\\frac{dCT}{d\overline{r}}$")
-pl.plot(r, dCp, "k", markersize=4, label="$\\frac{dCP}{d\overline{r}}$")
+pl.plot(r, dCt_optimal, "r", markersize=4, label=r"$\frac{dCT}{d\overline{r}}$")
+pl.plot(r, dCp, "k", markersize=4, label=r"$\frac{dCP}{d\overline{r}}$")
 pl.grid(True)
 pl.legend(numpoints=3)
-pl.xlabel("$\overline{r}$")
+pl.xlabel(r"$\overline{r}$")
 pl.ylabel("")
 pl.title("Load Distribution")
 
 pl.figure(2)
-pl.plot(chi, a_optimal, "r", markersize=4, label="$a$")
-pl.plot(chi, ap_optimal, "k", markersize=4, label="$a^1$")
+pl.plot(chi, a_optimal, "r", markersize=4, label=r"$a$")
+pl.plot(chi, ap_optimal, "k", markersize=4, label=r"$a^1$")
 pl.grid(True)
 pl.legend(numpoints=3)
-pl.xlabel("$\chi$")
+pl.xlabel(r"$\chi$")
 pl.ylabel("")
 pl.title("Interference Factors")
 
 if prandtl_correction:
     pl.figure(3)
     pl.plot(r, F, "k", markersize=4)
     pl.grid(True)
-    pl.xlabel("$\overline{r}$")
-    pl.ylabel("$F(\overline{r})$")
+    pl.xlabel(r"$\overline{r}$")
+    pl.ylabel(r"$F(\overline{r})$")
     pl.title("Tip Loss Prandtl Correction Function")
 
 pl.show()

SU2_PY/SU2/run/interface.py

@@ -263,11 +263,14 @@ def run_command(Command):
     """
     sys.stdout.flush()
 
+    # Use communicate() to continuously drain stderr and avoid deadlocks if the
+    # subprocess writes a lot of output to stderr.
     proc = subprocess.Popen(
         Command, shell=True, stdout=sys.stdout, stderr=subprocess.PIPE
     )
-    return_code = proc.wait()
-    message = proc.stderr.read().decode()
+    _, stderr = proc.communicate()
+    return_code = proc.returncode
+    message = stderr.decode(errors="replace")
 
     if return_code < 0:
         message = "SU2 process was terminated by signal '%s'\n%s" % (
@@ -277,7 +280,7 @@ def run_command(Command):
         raise SystemExit(message)
     elif return_code > 0:
         message = "Path = %s\nCommand = %s\nSU2 process returned error '%s'\n%s" % (
-            os.path.abspath(","),
+            os.path.abspath("."),
             Command,
             return_code,
             message,

SU2_PY/parallel_computation_fsi.py

@@ -102,7 +102,6 @@ def parallel_computation(filename, partitions=0, compute=True):
         config.SOLUTION_FILENAME = config.RESTART_FILENAME
     elif config.SOLVER == "FLUID_STRUCTURE_INTERACTION":
         config.SOLUTION_FILENAME = config.RESTART_FILENAME
-        config.SOLUTION_FILENAME = config.RESTART_FILENAME
 
     info = SU2.run.merge(config)
     state.update(info)