Python code in interpolation_1 fails in shell version

[wenzeslaus]

!import grass.script as gs
!for power in [0.5, 1, 2, 5]:
!    gs.run_command('d.mon', start='cairo',
!        output='elev_idw_1m_power_{}_histogram.png'.format(power))
!    gs.run_command('d.histogram',
!        map='elev_idw_1m_power_{}'.format(power))
!    gs.run_command('d.mon', stop='cairo')
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/bin/sh: 1: import: not found
/bin/sh: 1: Syntax error: end of file unexpected
/bin/sh: 1: Syntax error: word unexpected (expecting ")")
/bin/sh: 1: Syntax error: "(" unexpected
/bin/sh: 1: Syntax error: word unexpected (expecting ")")
/bin/sh: 1: Syntax error: "(" unexpected
/bin/sh: 1: Syntax error: word unexpected (expecting ")")

The generator does not recognize this as Python code.