def get_nav_open(fund_type='all'):
 if (ct._check_nav_oft_input(fund_type) is True):
  ct._write_head()
  nums = _get_fund_num((ct.SINA_NAV_COUNT_URL % (ct.P_TYPE['http'], ct.DOMAINS['vsf'], ct.NAV_OPEN_KEY[fund_type], ct.NAV_OPEN_API[fund_type], ct.NAV_OPEN_T2[fund_type], ct.NAV_OPEN_T3)))
  fund_df = _parse_fund_data((ct.SINA_NAV_DATA_URL % (ct.P_TYPE['http'], ct.DOMAINS['vsf'], ct.NAV_OPEN_KEY[fund_type], ct.NAV_OPEN_API[fund_type], nums, ct.NAV_OPEN_T2[fund_type], ct.NAV_OPEN_T3)))
  return fund_df

def get_nav_open ( fund_type = 'all' ) : if ( ct . _check_nav_oft_input ( fund_type ) is True ) : ct . _write_head ( ) nums = _get_fund_num ( ( ct . SINA_NAV_COUNT_URL % ( ct . P_TYPE [ 'http' ] , ct . DOMAINS [ 'vsf' ] , ct . NAV_OPEN_KEY [ fund_type ] , ct . NAV_OPEN_API [ fund_type ] , ct . NAV_OPEN_T2 [ fund_type ] , ct . NAV_OPEN_T3 ) ) ) fund_df = _parse_fund_data ( ( ct . SINA_NAV_DATA_URL % ( ct . P_TYPE [ 'http' ] , ct . DOMAINS [ 'vsf' ] , ct . NAV_OPEN_KEY [ fund_type ] , ct . NAV_OPEN_API [ fund_type ] , nums , ct . NAV_OPEN_T2 [ fund_type ] , ct . NAV_OPEN_T3 ) ) ) return fund_df
parameters type:string 1 .