human
Solve the following python programming problem given the following code:
def test_compile_stale_platform_settings(self) : 
    with temporary_dir (root_dir = os.path.abspath ('.')) as tmpdir : 
        with open (os.path.join (f, 'BUILD'), 'w') as f : 
            f.write (dedent ("
        java_library(name='diamond',
          sources=['Diamond.java'],
       )
        ")) 
with open (os.path.join (tmpdir, 'Diamond.java'), 'w') as f : 
            f.write (dedent ('
          public class Diamond<T> {
            public static void main(String[] args) {
              // The diamond operator <> for generics was introduced in jdk7.
              Diamond<String> shinyDiamond = new Diamond<>();
            }
          }
        ')) 
platforms = { 
            'java6' : { 
                'source' : '6', 
}, 
            'java7' : { 
                'source' : '7', 
}, 
} 
        with self.temporary_workdir () as workdir : 
            def compile_diamond(platform) : 
                return self.run_pants_with_workdir (((['--jvm-platform-platforms={}'.format (platforms), '--jvm-platform-default-platform={}'.format (platform), '-ldebug', 'compile'] + self.get_pants_compile_args ()) + ['{}:diamond'.format (tmpdir)]), workdir = workdir) 
self.assert_failure (compile_diamond ('java6'), 'Diamond.java was compiled successfully with java6 starting from a fresh workdir, but that should not be possible.') 
            self.assert_success (compile_diamond ('java7'), 'Diamond.java failed to compile in java7, which it should be able to.') 
            self.assert_failure (compile_diamond ('java6'), 'Diamond.java erroneously compiled in java6, which means that either compilation was skipped due to bad fingerprinting/caching, or the compiler failed to clean up the previous class from the java7 compile.') 

    
    

    Fix the buggy line: with open (os.path.join (f, 'BUILD'), 'w') as f :
assistant
#Here is Python code to fix the buggy line: with open (os.

with open (os.path.join (tmpdir, 'BUILD'), 'w') as f :