fix: flake8 errors
diff --git a/lib/py/test/test_compiler/test_keyword_escape.py b/lib/py/test/test_compiler/test_keyword_escape.py
index 37baccc..bc6eb49 100755
--- a/lib/py/test/test_compiler/test_keyword_escape.py
+++ b/lib/py/test/test_compiler/test_keyword_escape.py
@@ -32,28 +32,32 @@
         thrift_path = os.environ['THRIFT']
         if os.path.exists(thrift_path):
             return thrift_path
-    
+
     # Check common locations in PATH
     paths = [
         'thrift',
         '/usr/local/bin/thrift',
         '/usr/bin/thrift',
     ]
-    
+
     for path in paths:
         if shutil.which(path):
             return path
-    
+
     # Check if we're in the source tree with built compiler
-    possible_build_thrift = os.path.join(os.path.dirname(__file__), '..', '..', '..', 'build', 'compiler', 'cpp', 'bin', 'thrift')
+    possible_build_thrift = os.path.join(
+        os.path.dirname(__file__), '..', '..', '..',
+        'build', 'compiler', 'cpp', 'bin', 'thrift')
     if os.path.exists(possible_build_thrift):
         return possible_build_thrift
-    
+
     # Check for cpp compiler location
-    possible_cpp_thrift = os.path.join(os.path.dirname(__file__), '..', '..', '..', 'compiler', 'cpp', 'thrift')
+    possible_cpp_thrift = os.path.join(
+        os.path.dirname(__file__), '..', '..', '..',
+        'compiler', 'cpp', 'thrift')
     if os.path.exists(possible_cpp_thrift):
         return possible_cpp_thrift
-    
+
     return None
 
 
@@ -61,57 +65,57 @@
     """
     Test that the Python generator produces valid Python code
     when the Thrift schema contains Python keywords.
-    
+
     This verifies THRIFT-5927: Python code generator should escape
     identifiers that are Python reserved keywords.
     """
     thrift_file = os.path.join(os.path.dirname(__file__), 'Thrift5927.thrift')
-    
+
     if not os.path.exists(thrift_file):
-        print(f"ERROR: Test file not found: {thrift_file}")
+        print("ERROR: Test file not found: " + thrift_file)
         return 1
-    
+
     thrift_bin = find_thrift()
     if not thrift_bin:
         print("WARNING: thrift compiler not found, skipping test")
         print("(In CI, thrift should be available via THRIFT env var)")
         return 0  # Skip gracefully rather than fail
-    
+
     with tempfile.TemporaryDirectory() as tmpdir:
         result = subprocess.run(
             [thrift_bin, '-r', '-gen', 'py', '-out', tmpdir, thrift_file],
             capture_output=True,
             text=True
         )
-        
+
         if result.returncode != 0:
-            print(f"ERROR: thrift compiler failed")
-            print(f"stdout: {result.stdout}")
-            print(f"stderr: {result.stderr}")
+            print("ERROR: thrift compiler failed")
+            print("stdout: " + result.stdout)
+            print("stderr: " + result.stderr)
             return 1
-        
+
         py_files = glob.glob(os.path.join(tmpdir, '**', '*.py'), recursive=True)
-        
+
         if not py_files:
             print("ERROR: No Python files generated")
             return 1
-        
+
         failed = []
         for py_file in py_files:
             try:
                 py_compile.compile(py_file, doraise=True)
             except py_compile.PyCompileError as e:
                 failed.append((py_file, str(e)))
-        
+
         if failed:
             print("ERROR: Generated Python files have syntax errors:")
             for file_path, error in failed:
-                print(f"  {file_path}: {error}")
+                print("  " + file_path + ": " + error)
             return 1
-        
-        print(f"OK: All {len(py_files)} generated Python files compile successfully")
+
+        print("OK: All " + str(len(py_files)) + " generated Python files compile successfully")
         return 0
 
 
 if __name__ == '__main__':
-    sys.exit(test_keyword_escape_compilation())
\ No newline at end of file
+    sys.exit(test_keyword_escape_compilation())