配列から関数に複数の引数を送る方法

配列から、関数に複数の引数を送るやり方が分からず困っています。

また、
以下のエラーが発生してしまいます。
ValueError: could not convert string to float: max_wind_direction

以下がプログラム一部抜粋です。

# coding: utf-8
import codecs
import math

class JMACSVReader(object):
  def __init__(self, filename,format,encoding='shift_jisx0213', header_ofs=6):
    self.format = format
    self._istream = codecs.open(filename, 'r', encoding)
    for i in range(header_ofs):
      self._istream.readline() # ヘッダを読み飛ばす

  def _parse_line(self,line):
    record = {}
    for k,v in zip(self.format, line.split(',')):
      if k is not None:
        record[k] = v
    return record

  def __iter__(self):
    for line in self._istream:
      yield(self._parse_line(line))

weather_codes = [
  (u'薄', 'Usu'),(u'大', 'Oo'),
  (u'暴風雨', 'Bofu'), (u'快晴', 'Kaisei'),
  (u'雨', 'Ame'),(u'晴', 'Hare'),
  (u'雪', 'Yuki'), (u'曇', 'Kumori'),
  (u'みぞれ', 'Mizore'), (u'ひょう', 'Hyo'),
  (u'霧', 'Kiri'),
]

sincos_codes = [
  (u'北','0'),(u'東','90'),
  (u'南','180'),(u'西','270'),
  (u'北北東','23'),(u'北東','45'),
  (u'東北東','68'),(u'東南東','113'),
  (u'南東','135'),(u'南南東','158'),
  (u'南南西','203'),(u'南西','225'),
  (u'西南西','248'),(u'西北西','293'),
  (u'北西','315'),(u'北北西','338'),
]

wind_direction_codes = [
  (u'北', 'N'),(u'東','S'),
  (u'南','S'),(u'西','N'),
  (u'北北東','N'),(u'北東','N'),
  (u'東北東','N'),(u'東南東','S'),
  (u'南東','S'),(u'南南東','S'),
  (u'南南西','S'),(u'南西','S'),
  (u'西南西','E'),(u'西北西','N'),
  (u'北西','N'),(u'北北西','N'),
]

def ame(weather):
  yuki_length=weather.find(u'雪')
  ame_length=weather.find(u'雨')
  if(yuki_length==-1):
    weather= u'雨'
    return weather
  if(ame_length<yuki_length):
    weather= u'雨'
    return weather
  else:
    weather= u'雪'
    return weather

def ame_yuki(weather):
  if u'雨' in weather:
    weather=ame(weather)
    return weather
  elif u'雪' in weather:
    weather= u'雪'
    return weather
  elif u'みぞれ' in weather:
    weather= u'雪'
    return weather
  elif u'ひょう' in weather:
    weather= u'雪'
    return weather
  else:
   return weather


def wind_direction(wind):

  for k,v in wind_direction_codes:
   wind = re.sub('^%s$'%k,v,wind.strip())
  return wind
def exchange_cos(rad):
  test=float(rad)
  test=math.radians(test)
  hi=math.cos(test)
  return hi

def wind_exchange_cos(wind_s,wind):
  for k,v in sincos_codes:
   wind = re.sub('^%s$'%k,v,wind.strip())
  wind=exchange_cos(wind)
  #test=math.radians(wind)
  #hi=math.sin(test)
  wind=wind_s*wind
  #print str(wind).encode('utf-8')
  return str(wind).encode('utf-8')

def exchange_sin(rad):
  test=float(rad)
  test=math.radians(test)
  hi=math.sin(test)
  return hi

def wind_exchange_sin(wind_s,wind):
  for k,v in sincos_codes:
   wind = re.sub('^%s$'%k,v,wind.strip())
  wind=exchange_sin(wind)
  #test=math.radians(wind)
  #hi=math.sin(test)
  wind=wind_s*wind
  #print str(wind).encode('utf-8')
  return str(wind).encode('utf-8')

def encode_weather(weather):
  # 日本語があると何かと面倒なのでコード値にしてしまう。彦根市は上記のルールだけで大丈夫だったが、他の地域や期間に対応するにはパターンを増やす必要があるかも。
  # 「晴れ一時雨後曇り」とか後ろについてくるやつは面倒くさいので除去する。

 weather=ame_yuki(weather)
 wcode = re.sub( u'(一時|時々|後|、).*','',weather.strip())

 for k,v in weather_codes:
  wcode = wcode.replace(k,v)
 return wcode

def format_file_main(filename, in_format, out_format):
  jmacsv = JMACSVReader(filename, in_format)
  for record in jmacsv:
    line = []
    for of in out_format:
      if isinstance(of,tuple):
        line.append(of[1](record[of[0]]))
      else:
        line.append(record[of])
    print(u'\t'.join(line).encode('utf-8'))

if __name__=='__main__':
  # usage: jmaformat.py data.csv
  import sys
  import re
  in_format = [
    'date',
    'temp_max',None,None,
    'temp_min',None,None,
    'weather',None,None,
    'total_rainfall',None,None,None,
    'avg_windspeed',None,None,
    'avg_atom',None,None,
    'avg_humid',None,None,
    'avg_temp',None,None,
    'hours_of_sunshine',None,None,None,
    'highest_snow_depth',None,None,None,
    'max_windspeed',None,'max_wind_direction',None,None,
    'max_instantaneous_windspeed',None,'max_instantaneous_wind_direction',None,None,None,None,None,
    'avg_vapor_pressure',None,None,
    'min_atom',None,None,
    'avg_humid',None,None,
    'min_humid',None,None,None,
    '10min_avg_cloudcover',None,None,
    'total_snow_depth',None,None,None,
    'total_solar_insolation',None,None,
    '1hour_max_rainfall',None,None,None,
  ]


  out_format = ['date','temp_max','temp_min','total_rainfall',
  'avg_windspeed','avg_atom','avg_humid','avg_temp', 'hours_of_sunshine',
  'highest_snow_depth','max_windspeed',
  (wind_exchange_sin(max_windspeed,max_wind_direction)),(wind_exchange_cos(max_windspeed,max_wind_direction)),
  'max_instantaneous_windspeed',('max_instantaneous_wind_direction',wind_exchange_sin),('max_instantaneous_wind_direction',wind_exchange_cos),
  'avg_vapor_pressure','min_atom','avg_humid','min_humid','10min_avg_cloudcover',
  'total_snow_depth','total_solar_insolation','1hour_max_rainfall',('weather',  encode_weather ),]



  for file in sys.argv[1:]:
    format_file_main(file,in_format,out_format)