diff --git a/Python/pywarpx/fields.py b/Python/pywarpx/fields.py
index 31dde3d8a4c..33b6329c9ca 100644
--- a/Python/pywarpx/fields.py
+++ b/Python/pywarpx/fields.py
@@ -703,6 +703,7 @@ def BzFPExternalWrapper(level=0, include_ghosts=False):
         mf_name="Bfield_fp_external", idir=2, level=level, include_ghosts=include_ghosts
     )
 
+
 def ExHybridExternalWrapper(level=0, include_ghosts=False):
     return _MultiFABWrapper(
         mf_name="Efield_hyb_external[x]", level=level, include_ghosts=include_ghosts
@@ -738,6 +739,7 @@ def BzHybridExternalWrapper(level=0, include_ghosts=False):
         mf_name="Bfield_hyb_external[z]", level=level, include_ghosts=include_ghosts
     )
 
+
 def JxFPWrapper(level=0, include_ghosts=False):
     return _MultiFABWrapper(
         mf_name="current_fp", idir=0, level=level, include_ghosts=include_ghosts
diff --git a/Python/pywarpx/picmi.py b/Python/pywarpx/picmi.py
index 390523cfd1e..fb9662510ce 100644
--- a/Python/pywarpx/picmi.py
+++ b/Python/pywarpx/picmi.py
@@ -1834,12 +1834,14 @@ def __init__(
         self.By_external_function = By_expression
         self.Bz_external_function = Bz_expression
 
-        if (Ex_expression is not None
+        if (
+            Ex_expression is not None
             or Ey_expression is not None
             or Ez_expression is not None
             or Bx_expression is not None
             or By_expression is not None
-            or Bz_expression is not None):
+            or Bz_expression is not None
+        ):
             self.add_external_fields = True
 
         # Handle keyword arguments used in expressions
diff --git a/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceSolver.H b/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceSolver.H
index 488c73d84a0..11abeedf90a 100644
--- a/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceSolver.H
+++ b/Source/FieldSolver/FiniteDifferenceSolver/FiniteDifferenceSolver.H
@@ -4,7 +4,7 @@
  *
  * Authors: Remi Lehe (LBNL)
  *          S. Eric Clark (Helion Energy)
- * 
+ *
  * License: BSD-3-Clause-LBNL
  */
 
diff --git a/Source/FieldSolver/FiniteDifferenceSolver/HybridPICModel/HybridPICModel.H b/Source/FieldSolver/FiniteDifferenceSolver/HybridPICModel/HybridPICModel.H
index 1b5ccd1bb74..3d8f1448612 100644
--- a/Source/FieldSolver/FiniteDifferenceSolver/HybridPICModel/HybridPICModel.H
+++ b/Source/FieldSolver/FiniteDifferenceSolver/HybridPICModel/HybridPICModel.H
@@ -53,7 +53,7 @@ public:
         const int ncomps,
         const amrex::IntVect& ngJ,
         const amrex::IntVect& ngRho,
-        const amrex::IntVect& ngE, 
+        const amrex::IntVect& ngE,
         const amrex::IntVect& ngB,
         const amrex::IntVect& jx_nodal_flag,
         const amrex::IntVect& jy_nodal_flag,
@@ -83,7 +83,7 @@ public:
         warpx::fields::FieldType field_type,
         std::array< amrex::ParserExecutor<4>, 3> const& expression,
         int lev);
-    
+
     void GetExternalFieldFromExpression (
         warpx::fields::FieldType field_type,
         std::array< amrex::ParserExecutor<4>, 3> const& expression,
diff --git a/Source/FieldSolver/WarpXPushFieldsHybridPIC.cpp b/Source/FieldSolver/WarpXPushFieldsHybridPIC.cpp
index 15f94c30f81..29d8bebda40 100644
--- a/Source/FieldSolver/WarpXPushFieldsHybridPIC.cpp
+++ b/Source/FieldSolver/WarpXPushFieldsHybridPIC.cpp
@@ -67,7 +67,7 @@ void WarpX::HybridPICEvolveFields ()
 
     // Get requested number of substeps to use
     const int sub_steps = m_hybrid_pic_model->m_substeps;
-    
+
     amrex::Real t_eval = gett_old(0);
     amrex::Real sub_dt = 0.5_rt*dt[0]/sub_steps;
 
@@ -83,8 +83,8 @@ void WarpX::HybridPICEvolveFields ()
             for (int idim = 0; idim < 3; ++idim) {
                 MultiFab::Subtract(
                     *m_fields.get(FieldType::Bfield_fp, Direction{idim}, lev),
-                    *m_fields.get(FieldType::hybrid_B_fp_external, Direction{idim}, lev), 
-                    0, 0, 1, 
+                    *m_fields.get(FieldType::hybrid_B_fp_external, Direction{idim}, lev),
+                    0, 0, 1,
                     m_fields.get(FieldType::hybrid_B_fp_external, Direction{idim}, lev)->nGrowVect());
             }
         }
@@ -217,13 +217,13 @@ void WarpX::HybridPICEvolveFields ()
             for (int idim = 0; idim < 3; ++idim) {
                 MultiFab::Add(
                     *m_fields.get(FieldType::Bfield_fp, Direction{idim}, lev),
-                    *m_fields.get(FieldType::hybrid_B_fp_external, Direction{idim}, lev), 
-                    0, 0, 1, 
+                    *m_fields.get(FieldType::hybrid_B_fp_external, Direction{idim}, lev),
+                    0, 0, 1,
                     m_fields.get(FieldType::hybrid_B_fp_external, Direction{idim}, lev)->nGrowVect());
                 MultiFab::Add(
                     *m_fields.get(FieldType::Efield_fp, Direction{idim}, lev),
-                    *m_fields.get(FieldType::hybrid_E_fp_external, Direction{idim}, lev), 
-                    0, 0, 1, 
+                    *m_fields.get(FieldType::hybrid_E_fp_external, Direction{idim}, lev),
+                    0, 0, 1,
                     m_fields.get(FieldType::hybrid_E_fp_external, Direction{idim}, lev)->nGrowVect());
             }
         }