Modify Dates Entry for SWAN Input Files

#!/usr/bin/env python

" Modificar las fechas de entrada de los ficheros swn que corresponden a la generacion de productos para EQUION"

from time import localtime,mktime

today = str(localtime()[0]) + str(localtime()[1]) + str(localtime()[2])
tmpdate = mktime((localtime()[0],localtime()[1],localtime()[2]+1,0,0,0,0,0,0))
tomow = str(localtime(tmpdate)[0]) + str(localtime(tmpdate)[1]) + str(localtime(tmpdate)[2])
tmpdate = mktime((localtime()[0],localtime()[1],localtime()[2]+5,0,0,0,0,0,0))
day4 = str(localtime(tmpdate)[0]) + str(localtime(tmpdate)[1]) + str(localtime(tmpdate)[2])

_swn1 = open('OlasCaribe_dia1.swn','r+')
## Malla de Entrada
for count in range(24):
    line = _swn1.readline()
_swn1.seek(-37,1)
_swn1.write(today)
_swn1.seek(13,1)
_swn1.write(tomow)
line = _swn1.readline()      #lee la linea completa para mover el puntero al final de la linea

# Nesting Galerazamba
for count in range(24):
    line =  _swn1.readline()     #lee el numero de lineas anteriores a la de interes
_swn1.seek(-23,1)
_swn1.write(today)
line = _swn1.readline()      #lee la linea completa para mover el puntero al final de la linea

##Boya Galerazamba
for count in range(6):
    line = _swn1.readline()
_swn1.seek(-23,1)
_swn1.write(today)
line = _swn1.readline()

#Boya Mapale I
for count in range(6):
    line = _swn1.readline()
_swn1.seek(-23,1)
_swn1.write(today)
line = _swn1.readline()

#Boya Mapale II
for count in range(6):
    line = _swn1.readline()
_swn1.seek(-23,1)
_swn1.write(today)
line = _swn1.readline()

#Boya NOAA
for count in range(6):
    line = _swn1.readline()
_swn1.seek(-23,1)
_swn1.write(today)
line = _swn1.readline()
for count in range(3):
    line = _swn1.readline()
_swn1.seek(-23,1)
_swn1.write(today)
line = _swn1.readline()
line = _swn1.readline()
_swn1.seek(-23,1)
_swn1.write(today)
line = _swn1.readline()
line = _swn1.readline()
_swn1.seek(-23,1)
_swn1.write(today)
line = _swn1.readline()
line = _swn1.readline()
_swn1.seek(-23,1)
_swn1.write(today)
line = _swn1.readline()
for count in range(3):
    line = _swn1.readline()
_swn1.seek(-39,1)
_swn1.write(today)          #escribe el dato de salida
_swn1.seek(15,1)         #desplaza el pointer hasta el siguiente campo de fecha
_swn1.write(tomow)
_swn1.close()

# Comentados:
#for count in range(47):
#   null_ =  _swn1.readline()     #lee el numero de lineas anteriores a la de interes
#line = _swn1.readline()      #lee la linea completa donde se va a hacer la modificacion
#_swn1.seek(-23,1)            #se devuelve xx caracteres antes del final de la misma linea
#_swn1.write(today)          #escribe el dato de salida
#line = _swn1.readline()      #lee la linea completa para mover el puntero al final de la linea

#for count in range(33):
#    null_ =  _swn1.readline()
#line = _swn1.readline()
#_swn1.seek(-39,1)
#_swn1.write(today)          #escribe el dato de salida
#_swn1.seek(15,1)         #desplaza el pointer hasta el siguiente campo de fecha
#_swn1.write(tomow)
#_swn1.close()
#End of OlasCaribe_dia1.swn Treatment

# =================================================
_swn2 = open('OlasCaribe_dia2_5.swn','r+')

#Vientos
for count in range(24):
    line =  _swn2.readline()
_swn2.seek(-37,1)
_swn2.write(tomow)
_swn2.seek(13,1)
_swn2.write(day4)
line = _swn2.readline()

#Nesting Galerazamba
for count in range(24):
    line =  _swn2.readline()
_swn2.seek(-23,1)
_swn2.write(tomow)
line = _swn2.readline()

#Boya Galerazamba
for count in range(6):
    line =  _swn2.readline()
_swn2.seek(-23,1)
_swn2.write(tomow)
line =  _swn2.readline()

#Boya Mapale I
for count in range(6):
    line =  _swn2.readline()
_swn2.seek(-23,1)
_swn2.write(tomow)
line =  _swn2.readline()

#Boya Mapale II
for count in range(6):
    line =  _swn2.readline()
_swn2.seek(-23,1)
_swn2.write(tomow)
line =  _swn2.readline()
#Boya NOAA
for count in range(6):
    line =  _swn2.readline()
_swn2.seek(-23,1)
_swn2.write(tomow)
line =  _swn2.readline()
for count in range(3):
    line =  _swn2.readline()
_swn2.seek(-23,1)
_swn2.write(tomow)
line =  _swn2.readline()
line =  _swn2.readline()
_swn2.seek(-23,1)
_swn2.write(tomow)
line =  _swn2.readline()
line =  _swn2.readline()
_swn2.seek(-23,1)
_swn2.write(tomow)
line =  _swn2.readline()
line =  _swn2.readline()
_swn2.seek(-23,1)
_swn2.write(tomow)
line =  _swn2.readline()
for count in range(3):
    line =  _swn2.readline()
_swn2.seek(-39,1)
_swn2.write(tomow)
_swn2.seek(15,1)
_swn2.write(day4)
_swn2.close()

# End of OlasCaribe_dia2_5.swn treatment
# =================================================
_swn3 = open('OlasGalerazamba.swn','r+')
for count in range(53):
    line =  _swn3.readline()
_swn3.seek(-23,1)
_swn3.write(today)
line =  _swn3.readline()

for count in range(6):
    line =  _swn3.readline()
_swn3.seek(-23,1)
_swn3.write(today)
line =  _swn3.readline()

for count in range(6):
    line =  _swn3.readline()
_swn3.seek(-23,1)
_swn3.write(today)
line =  _swn3.readline()

for count in range(5):
    line =  _swn3.readline()
_swn3.seek(-23,1)
_swn3.write(today)
line =  _swn3.readline()

line =  _swn3.readline()
_swn3.seek(-23,1)
_swn3.write(today)
line =  _swn3.readline()

line =  _swn3.readline()
_swn3.seek(-23,1)
_swn3.write(today)
line =  _swn3.readline()

line =  _swn3.readline()
_swn3.seek(-23,1)
_swn3.write(today)
line =  _swn3.readline()

for count in range(4):
    line =  _swn3.readline()
_swn3.seek(-39,1)
_swn3.write(today)
_swn3.seek(15,1)
_swn3.write(tomow)
_swn3.close()
# End of OlasGalerazamba.swn treatment
# =================================================
_swn4 = open('OlasGalerazamba2.swn','r+')
for count in range(54):
    line =  _swn4.readline()
_swn4.seek(-23,1)
_swn4.write(tomow)
line =  _swn4.readline()
for count in range(6):
    line =  _swn4.readline()
_swn4.seek(-23,1)
_swn4.write(tomow)
line =  _swn4.readline()

for count in range(6):
    line =  _swn4.readline()
_swn4.seek(-23,1)
_swn4.write(tomow)
line =  _swn4.readline()

for count in range(5):
    line =  _swn4.readline()
_swn4.seek(-23,1)
_swn4.write(tomow)
line =  _swn4.readline()

line =  _swn4.readline()
_swn4.seek(-23,1)
_swn4.write(tomow)
line =  _swn4.readline()

line =  _swn4.readline()
_swn4.seek(-23,1)
_swn4.write(tomow)
line =  _swn4.readline()

line =  _swn4.readline()
_swn4.seek(-23,1)
_swn4.write(tomow)
line =  _swn4.readline()

for count in range(4):
    line =  _swn4.readline()
_swn4.seek(-39,1)
_swn4.write(tomow)
_swn4.seek(15,1)
_swn4.write(day4)
_swn4.close()
# End of OlasGalerazamba2.swn treatment