[python] allow for multiple init_logger() calls

dune/xt/common/exceptions.hh

@@ -148,6 +148,9 @@ class dependency_missing : public Dune::Exception
 class this_should_not_happen : public Dune::InvalidStateException
 {};
 
+class logger_error : public Dune::Exception
+{};
+
 
 } // namespace Exceptions
 

dune/xt/common/python.cc

@@ -47,8 +47,11 @@ void add_initialization(pybind11::module& m, std::string logger_name)
            const std::string& info_color,
            const std::string& debug_color,
            const std::string& warning_color) {
+        try {
           Dune::XT::Common::TimedLogger().create(
               max_info_level, max_debug_level, enable_warnings, enable_colors, info_color, debug_color, warning_color);
+        } catch (Dune::XT::Common::Exceptions::logger_error&) {
+        }
         },
         "max_info_level"_a = std::numeric_limits<ssize_t>::max(),
         "max_debug_level"_a = std::numeric_limits<ssize_t>::max(),

dune/xt/common/timedlogging.cc

@@ -95,8 +95,7 @@ void TimedLogging::create(const ssize_t max_info_level,
                           const std::string warning_color)
 {
   DUNE_UNUSED std::lock_guard<std::mutex> guard(mutex_);
-  if (created_)
-    DUNE_THROW(Exceptions::you_are_using_this_wrong, "Do not call create() more than once!");
+  DUNE_THROW_IF(created_, Exceptions::logger_error, "Do not call create() more than once!");
   max_info_level_ = max_info_level;
   max_debug_level_ = max_debug_level;
   enable_warnings_ = enable_warnings;